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Inital Release:          OTP 25.0
Git Tag:                 OTP-25.0
Date:                    2022-04-13
Trouble Report Id:       OTP-15991, OTP-15993, OTP-16464, OTP-16607,
                         OTP-16643, OTP-16644, OTP-16702, OTP-16852,
                         OTP-16982, OTP-17119, OTP-17151, OTP-17224,
                         OTP-17304, OTP-17318, OTP-17323, OTP-17351,
                         OTP-17370, OTP-17414, OTP-17447, OTP-17471,
                         OTP-17479, OTP-17480, OTP-17481, OTP-17504,
                         OTP-17518, OTP-17523, OTP-17524, OTP-17544,
                         OTP-17550, OTP-17551, OTP-17554, OTP-17555,
                         OTP-17556, OTP-17558, OTP-17561, OTP-17562,
                         OTP-17566, OTP-17569, OTP-17589, OTP-17592,
                         OTP-17608, OTP-17612, OTP-17617, OTP-17627,
                         OTP-17630, OTP-17636, OTP-17644, OTP-17654,
                         OTP-17660, OTP-17661, OTP-17667, OTP-17669,
                         OTP-17676, OTP-17681, OTP-17682, OTP-17683,
                         OTP-17684, OTP-17685, OTP-17701, OTP-17704,
                         OTP-17705, OTP-17710, OTP-17717, OTP-17720,
                         OTP-17728, OTP-17729, OTP-17733, OTP-17752,
                         OTP-17753, OTP-17755, OTP-17758, OTP-17762,
                         OTP-17772, OTP-17778, OTP-17779, OTP-17784,
                         OTP-17802, OTP-17810, OTP-17819, OTP-17820,
                         OTP-17821, OTP-17824, OTP-17826, OTP-17832,
                         OTP-17836, OTP-17841, OTP-17842, OTP-17846,
                         OTP-17855, OTP-17860, OTP-17866, OTP-17869,
                         OTP-17870, OTP-17878, OTP-17881, OTP-17882,
                         OTP-17884, OTP-17885, OTP-17889, OTP-17890,
                         OTP-17892, OTP-17894, OTP-17897, OTP-17899,
                         OTP-17901, OTP-17908, OTP-17909, OTP-17910,
                         OTP-17911, OTP-17915, OTP-17920, OTP-17921,
                         OTP-17923, OTP-17925, OTP-17927, OTP-17930,
                         OTP-17935, OTP-17939, OTP-17945, OTP-17950,
                         OTP-17951, OTP-17953, OTP-17958, OTP-17961,
                         OTP-17964, OTP-17965, OTP-17968, OTP-17969,
                         OTP-17970, OTP-17974, OTP-17976, OTP-17977,
                         OTP-17980, OTP-17984, OTP-17985, OTP-17986,
                         OTP-17988, OTP-17990, OTP-17991, OTP-17996,
                         OTP-17997, OTP-17999, OTP-18000, OTP-18001,
                         OTP-18003, OTP-18008, OTP-18009, OTP-18011,
                         OTP-18012, OTP-18014, OTP-18015, OTP-18020,
                         OTP-18027, OTP-18033, OTP-18034, OTP-18035,
                         OTP-18036, OTP-18038, OTP-18039, OTP-18047
Seq num:                 ERIERL-590, ERIERL-663, ERIERL-760, ERL-1347,
                         GH-2375, GH-2690, GH-4143, GH-4492, GH-4622,
                         GH-4673, GH-4759, GH-4784, GH-4819, GH-4853,
                         GH-4915, GH-4965, GH-4968, GH-4971, GH-5016,
                         GH-5071, GH-5093, GH-5094, GH-5140, GH-5204,
                         GH-5214, GH-5297, GH-5368, GH-5376, GH-5379,
                         GH-5402, GH-5403, GH-5463, GH-5513, GH-5606,
                         GH-5617, GH-5655, GH-5683, GH-5728, GH-5780,
                         GH-5782, GH-5801, GH-5828
System:                  OTP
Release:                 25
Application:             asn1-5.0.19, common_test-1.23, compiler-8.2,
                         crypto-5.1, debugger-5.3, dialyzer-5.0,
                         diameter-2.2.6, edoc-1.2, erl_docgen-1.3,
                         erl_interface-5.3, erts-13.0, eunit-2.7.1,
                         inets-8.0, jinterface-1.13, kernel-8.4,
                         megaco-4.4, mnesia-4.21, observer-2.12,
                         odbc-2.14, parsetools-2.4, public_key-1.13,
                         runtime_tools-1.19, sasl-4.2, snmp-5.13,
                         ssh-4.14, ssl-10.8, stdlib-4.0,
                         syntax_tools-3.0, tools-3.5.3, wx-2.2,
                         xmerl-1.3.29
Predecessor:             OTP

 Check out the git tag OTP-25.0, and build a full OTP system including
 documentation.

 ---------------------------------------------------------------------
 --- HIGHLIGHTS ------------------------------------------------------
 ---------------------------------------------------------------------

  OTP-15991    Application(s): erts, stdlib
               Related Id(s): PR-5208

               Users can now configure ETS tables with the
               {write_concurrency, auto} option. This option forces
               tables to automatically change the number of locks that
               are used at run-time depending on how much concurrency
               is detected. The {decentralized_counters, true} option
               is enabled by default when {write_concurrency, auto} is
               active.

               Benchmark results comparing this option with the other
               ETS optimization options are available here:

               https://erlang.org/bench/ets_bench_result_lock_config.html


  OTP-16702    Application(s): compiler, erts

               To enable more optimizations, BEAM files compiled with
               OTP 21 and earlier cannot be loaded in OTP 25.


  OTP-16982    Application(s): erts
               Related Id(s): PR-5020

               The signal queue of a process with
               message_queue_data=off_heap* has been optimized to
               allow parallel reception of signals from multiple
               processes.

               This is possible to do as Erlang only guarantees that
               signals (i.e., message signals and non-message signals)
               sent from a single process to another process are
               ordered in send order. However, there are no ordering
               guarantees for signals sent from different processes to
               a particular process. Therefore, several processes can
               send signals in parallel to a specific process without
               synchronizing with each other. However, such signal
               sending was previously always serialized as the senders
               had to acquire the lock for the outer signal queue of
               the receiving process. This parallel signal sending
               optimization yields much better scalability for signal
               sending than what was previously possible, see
               https://erlang.org/bench/sigq_bench_result.html for
               benchmark results.

               * Information about how to enable the
               message_queue_data=off_heap setting can be found in the
               documentation of the function erlang:process_flag/2.


  OTP-17119    Application(s): erts
               Related Id(s): PR-4869

               The JIT now works for 64-bit ARM processors.


  OTP-17151    Application(s): compiler, erts
               Related Id(s): ERIERL-590, PR-5479

               Added support for the compile attribute -nifs() to
               empower compiler and loader with information about
               which functions may be overridden as NIFs by
               erlang:load_nif/2. It is recommended to use this
               attribute in all modules that load NIF libraries.


  OTP-17351    Application(s): stdlib
               Related Id(s): GH-4673, PR-4952

               The format_status/2 callback for gen_server, gen_statem
               and gen_event has been deprecated in favor of the new
               format_status/1 callback.

               The new callback adds the possibility to limit and
               change many more things than the just the state, such
               as the last received message, the reason for
               terminating and more events specific to each type of
               behavior. See the respective modules documentation for
               more details.


  OTP-17481    Application(s): stdlib
               Related Id(s): PR-4811

               The timer module has been modernized and made more
               efficient, which makes the timer server less
               susceptible to being overloaded. The timer:sleep/1
               function now accepts an arbitrarily large integer.


  OTP-17504    Application(s): compiler, erts
               Related Id(s): GH-4971, PR-5281, PR-5752

               When binary construction using the binary syntax fails,
               the error message printed in the shell and by
               erl_error:format_exception/3,4 will contain more
               detailed information about what went wrong.


  OTP-17684    Application(s): compiler, erts
               Related Id(s): PR-5316, PR-5664

               The Erlang compiler now includes type information in
               BEAM files, and the JIT can now use that type
               information to do optimizations such as eliminating or
               simplifying type tests.


  OTP-17705    Application(s): compiler
               Related Id(s): PR-5411

               The maybe ... end construction proposed in EEP-49 has
               been implemented. It can simplify complex code where
               otherwise deeply nested cases would have to be used.

               To enable maybe, give the option -enable-feature
               maybe_expr to erlc or add -feature(enable, maybe_expr).
               inside the module.


  OTP-17710    Application(s): otp
               Related Id(s): PR-5597

               A new DEVELOPMENT how-to guide has been added that
               describes how to build and test Erlang/OTP when fixing
               bugs or developing new functionality.

               The makefile system has been extended to make it easier
               to run tests at different granulates directly from the
               command line. This new functionality is described in
               the development how-to.

               Using the extended makefile system, testing has been
               added to the Github actions run for each opened PR so
               that more bugs are caught earlier when bug fixes and
               new features are proposed.


  OTP-17720    Application(s): common_test, kernel, stdlib
               Related Id(s): PR-5162

               The new module peer supersedes the slave module. The
               slave module is now deprecated and will be removed in
               OTP 27.

               peer contains an extended and more robust API for
               starting erlang nodes.


  OTP-17784    Application(s): kernel, stdlib
               Related Id(s): PR-5792

               In order to make it easier for the user to manage
               multiple outstanding asynchronous call requests, new
               functionality utilizing request identifier collections
               have been introduced in erpc, gen_server, gen_statem,
               and gen_event.


  OTP-17841    Application(s): compiler, erts
               Related Id(s): PR-5694

               When a record matching or record update fails, a
               {badrecord,ExpectedRecordTag} exception used to be
               raised. In this release, the exception has been changed
               to {badrecord,ActualValue}, where ActualValue is the
               actual that was found instead of the expected record.


  OTP-17911    Application(s): kernel
               Related Id(s): OTP-17843, PR-5611, PR-5687

               *** POTENTIAL INCOMPATIBILITY ***

               As of OTP 25, global will by default prevent
               overlapping partitions due to network issues by
               actively disconnecting from nodes that reports that
               they have lost connections to other nodes. This will
               cause fully connected partitions to form instead of
               leaving the network in a state with overlapping
               partitions.

               Prevention of overlapping partitions can be disabled
               using the prevent_overlapping_partitions kernel(6)
               parameter, making global behave like it used to do.
               This is, however, problematic for all applications
               expecting a fully connected network to be provided,
               such as for example mnesia, but also for global itself.
               A network of overlapping partitions might cause the
               internal state of global to become inconsistent. Such
               an inconsistency can remain even after such partitions
               have been brought together to form a fully connected
               network again. The effect on other applications that
               expects that a fully connected network is maintained
               may vary, but they might misbehave in very subtle hard
               to detect ways during such a partitioning. Since you
               might get hard to detect issues without this fix, you
               are strongly advised not to disable this fix. Also note
               that this fix has to be enabled on all nodes in the
               network in order to work properly.


  OTP-17953    Application(s): stdlib
               Related Id(s): PR-5621

               Added filelib:ensure_path/1 that ensures that all
               directories for the given path exists (unlike
               filelib:ensure_dir/1, which will not create the last
               segment of the path).


  OTP-17969    Application(s): stdlib
               Related Id(s): PR-5588

               The functions groups_from_list/2 and groups_from_list/3
               have been added to the maps module.


  OTP-17977    Application(s): stdlib
               Related Id(s): GH-5606, PR-5766

               The functions uniq/1 and uniq/2 for removing duplicates
               have been added to the lists module.


  OTP-17988    Application(s): compiler, kernel, stdlib, syntax_tools

               Added support for selectable features as described in
               EEP-60. Features can be enabled/disabled during
               compilation with options (ordinary and +term) to erlc
               as well as with directives in the file. Similar options
               can be used to erl for enabling/disabling features
               allowed at runtime. The new maybe expression (EEP-49)
               is fully supported as the feature maybe_expr.


  OTP-18039    Application(s): compiler

               Change format of feature options and directives for
               better consistency. Options to erlc and the
               -compile(..) directive now has the format {feature,
               feature-name, enable | disable}. The -feature(..) now
               has the format -feature(feature-name, enable |
               disable).


 ---------------------------------------------------------------------
 --- POTENTIAL INCOMPATIBILITIES -------------------------------------
 ---------------------------------------------------------------------

  OTP-17544    Application(s): stdlib
               Related Id(s): PR-5008

               Fix gen_server:call with the first argument as self()
               to throw an error instead of failing with a timeout.

               The same fix has also been done for gen_statem:call/3,
               gen_event:sync_notify/2 and any other functionality
               relying on the internal gen:call/3 function.

               A similar fix was also done when using io:format/2 and
               the current group_leader was set to the current
               process.


  OTP-17569    Application(s): erts
               Related Id(s): PR-4793

               The growth rate of writable binaries has been adjusted
               to only increase by 20% after 16MB in size. Before this
               change the size would always double.

               This change may degrade write performance of large
               binaries.


  OTP-17627    Application(s): inets, stdlib

               Adjust uri_string:normalize behavior for URIs with
               undefined port (URI string with a port colon but no
               port value or URI map with port => undefined).

               Remove redundant normalization from http_request
               module.

               Before this change, normalize would not remove port
               subcomponent in such cases and could for example return
               "http://localhost:" URI.


  OTP-17644    Application(s): dialyzer
               Related Id(s): PR-5223

               Fixed a bug that could cause the type analyzer to enter
               an infinite loop.


  OTP-17681    Application(s): kernel
               Related Id(s): PR-5307

               The most, or at least the most used, rpc operations now
               require erpc support in order to communicate with other
               Erlang nodes. erpc was introduced in OTP 23. That is,
               rpc operations against Erlang nodes of releases prior
               to OTP 23 will fail.


  OTP-17683    Application(s): erts
               Related Id(s): PR-5306

               Distributed spawn operations now require distributed
               spawn_request() support. Distributed spawn_request()
               was introduced in OTP 23. That is, distributed spawn
               operations against Erlang nodes of releases prior to
               OTP 23 will fail.


  OTP-17821    Application(s): dialyzer
               Related Id(s): GH-5016, OTP-17554, PR-5408

               The default location of the plt has been changed from
               $HOME to filename:basedir(user_cache,"erlang").


  OTP-17866    Application(s): inets

               This change removes deprecated functions:
               http_uri:parse/1, http_uri:parse/2 and
               http_uri:scheme_defaults/0.

               This change delays until OTP-26 removal of deprecated
               functions: http_uri:encode/1 and http_uri:decode/1.

               This change marks httpd_util:decode_hex/1 and
               httpd_util:encode_hex/1 as deprecated.


  OTP-17889    Application(s): inets

               Fixed typo in Reason term returned from
               httpc_handler:handle_http_body.

               After this change, could_not_establish_ssl_tunnel atom
               is returned within Reason term.


  OTP-17894    Application(s): syntax_tools
               Related Id(s): PR-5509

               The erl_syntax_lib:analyze_attribute/1 function would
               return {Name, {Name, Value}} instead of {Name, Value}
               (which is the documented return value).


  OTP-17911    Application(s): kernel
               Related Id(s): OTP-17843, PR-5611, PR-5687

               *** HIGHLIGHT ***

               As of OTP 25, global will by default prevent
               overlapping partitions due to network issues by
               actively disconnecting from nodes that reports that
               they have lost connections to other nodes. This will
               cause fully connected partitions to form instead of
               leaving the network in a state with overlapping
               partitions.

               Prevention of overlapping partitions can be disabled
               using the prevent_overlapping_partitions kernel(6)
               parameter, making global behave like it used to do.
               This is, however, problematic for all applications
               expecting a fully connected network to be provided,
               such as for example mnesia, but also for global itself.
               A network of overlapping partitions might cause the
               internal state of global to become inconsistent. Such
               an inconsistency can remain even after such partitions
               have been brought together to form a fully connected
               network again. The effect on other applications that
               expects that a fully connected network is maintained
               may vary, but they might misbehave in very subtle hard
               to detect ways during such a partitioning. Since you
               might get hard to detect issues without this fix, you
               are strongly advised not to disable this fix. Also note
               that this fix has to be enabled on all nodes in the
               network in order to work properly.


  OTP-17920    Application(s): ssh

               The representation of Edward curves (ed25519 and ed448)
               inside ssh had a temporary representation (ed_pri and
               ed_pub).

               That is now changed to the public_key form. See the
               manual for more information.


  OTP-17921    Application(s): public_key

               The deprecated public_key functions ssh_decode/2,
               ssh_encode/2, ssh_hostkey_fingerprint/1 and
               ssh_hostkey_fingerprint/2 are removed.

               They are replaced by ssh_file:decode/2,
               ssh_file:encode/2, ssh:hostkey_fingerprint/1 and
               ssh:hostkey_fingerprint/2 respectively.

               Note that the decode/2 and encode/2 are not exact
               replacement functions, some minor changes may be
               needed. Se the manual for more information.


  OTP-17925    Application(s): stdlib
               Related Id(s): PR-5631

               The non-local function handler for the erl_eval can now
               be called with either two or three arguments. When
               called with three arguments, the first argument is the
               annotation for the node in the abstract format.

               All errors during evaluation will now be passed through
               erlang:raise/3. If the restricted shell is active and
               it does not let erlang:raise/3 through, evaluation
               errors will be printed in less clear way. See the
               documentation for restricted shell in shell.


  OTP-17950    Application(s): wx

               Added aux1Down and aux2Down fields to the wxMouseState
               record. Since one record have been changed a
               recompilation of user code might be required.


  OTP-17965    Application(s): crypto

               The infomation in error messages are increased.

               Previously the error was signaled with en error class
               exception badarg, notsup or error, and also in some
               more ways like an other exception or a return value in
               a non-standardized format.

               Now it is an error-class exception
               {notsup|badarg|error, InfoFromCfile,
               Description::string()}.

               The InfoFromCfile is a term with name and line number
               of the C-file where the error was found. This is
               primarily intended for a crypto maitntainer or an
               advanced user to find the cause of complicated errors -
               maybe in crypto itself. The contents of that term might
               be changed in the future.

               The Description is a clear text string that describes
               the error. In case of badarg and notsup the intention
               is that it should help the user to find the cause ("Bad
               key size" as an example). Specially for some error that
               are unlikely, the string may not be possible to
               understand without deep knowledge of the underlying
               cryptolib. Such messages are intended for a crypto
               maintainer.

               The first element on call stack (the S in try ... catch
               error:E:S .... end) gives more information like the
               actual argument list in the call of crypto and the
               argument number (if possible) in the call to the NIF
               inside crypto.

               The functions in crypto affected by this change are:

               sign/4, sign/5, verify/5, verify/6,

               generate_key/2, generate_key/3, compute_key/4,

               hash/2, hash/4, hash_init/1, hash_update/4,
               hash_final/1,

               mac/3,4, mac_init/3, mac_update/2, mac_final/2,

               pbkdf2_hmac/5,

               public_encrypt/4, private_decrypt/4, private_encrypt/4,
               public_decrypt/4

               This schema was introduced earlier in:

               crypto_init/3, crypto_init/4, crypto_update/2,
               crypto_final/1, crypto_get_data/1,

               crypto_one_time/4, crypto_one_time/5,
               crypto_one_time_aead/6, crypto_one_time_aead/7


  OTP-17991    Application(s): stdlib

               The function filename:safe_relative_path/1, which has
               been deprecated since OTP 25, has been removed. Use
               filelib:safe_relative_path/2 instead.


  OTP-18009    Application(s): stdlib
               Related Id(s): PR-5785

               Fixed string:next_grapheme/1 to return an empty binary
               in the tail for binary input for the last grapheme
               cluster.


 ---------------------------------------------------------------------
 --- OTP-25.0 --------------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17224    Application(s): erts, otp

               A test case has been added to the otp_SUITE that test
               that the dependency versions for OTP's applications are
               correct. The test case uses xref to check if the used
               functions are available in the specified dependency
               versions. The test case depends on the Erlang/OTP
               team's testing infrastructure and will be skipped if
               its dependencies are not met.


  OTP-17414    Application(s): common_test, crypto, erl_interface,
               erts, megaco, odbc, otp, snmp, wx
               Related Id(s): PR-4967

               Input for configure scripts adapted to autoconf 2.71.


  OTP-17669    Application(s): erl_docgen, otp
               Related Id(s): PR-5226

               Any exported, but private function or module in
               Erlang/OTP now generate an EEP-48 style documentation
               entry with the content set to hidden.

               Before this change, exported but private functions and
               modules did not have any entry at all.


  OTP-17710    Application(s): otp
               Related Id(s): PR-5597

               *** HIGHLIGHT ***

               A new DEVELOPMENT how-to guide has been added that
               describes how to build and test Erlang/OTP when fixing
               bugs or developing new functionality.

               The makefile system has been extended to make it easier
               to run tests at different granulates directly from the
               command line. This new functionality is described in
               the development how-to.

               Using the extended makefile system, testing has been
               added to the Github actions run for each opened PR so
               that more bugs are caught earlier when bug fixes and
               new features are proposed.


 ---------------------------------------------------------------------
 --- asn1-5.0.19 -----------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17980    Application(s): asn1

               The atom maybe has been quoted in the source code.


 Full runtime dependencies of asn1-5.0.19: erts-11.0, kernel-7.0,
 stdlib-3.13


 ---------------------------------------------------------------------
 --- common_test-1.23 ------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17881    Application(s): common_test
               Related Id(s): PR-5581

               Fix bug when running parallel testcases and together
               with one or more ct hooks that would cause the hook
               lock process to crash and produce printouts in the ct
               logs.


 --- Improvements and New Features ---

  OTP-17414    Application(s): common_test, crypto, erl_interface,
               erts, megaco, odbc, otp, snmp, wx
               Related Id(s): PR-4967

               Input for configure scripts adapted to autoconf 2.71.


  OTP-17676    Application(s): common_test
               Related Id(s): PR-5021

               Remove unused and undocumented tracer node
               functionality.


  OTP-17720    Application(s): common_test, kernel, stdlib
               Related Id(s): PR-5162

               *** HIGHLIGHT ***

               The new module peer supersedes the slave module. The
               slave module is now deprecated and will be removed in
               OTP 27.

               peer contains an extended and more robust API for
               starting erlang nodes.


  OTP-17882    Application(s): common_test
               Related Id(s): PR-5581

               The cth_surefire ct hook has been updated to include
               the file and line number of the executed test case in
               the xml output.

               The performance of the hook has also been improved
               greatly for test runs with many test cases.


 Full runtime dependencies of common_test-1.23: compiler-6.0,
 crypto-4.5, debugger-4.1, erts-7.0, ftp-1.0, inets-6.0, kernel-8.4,
 observer-2.1, runtime_tools-1.8.16, sasl-2.5, snmp-5.1.2, ssh-4.0,
 stdlib-4.0, syntax_tools-1.7, tools-3.2, xmerl-1.3.8


 ---------------------------------------------------------------------
 --- compiler-8.2 ----------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17820    Application(s): compiler

               Fixed a rare bug that would crash the compiler during
               type optimization.


  OTP-17860    Application(s): compiler
               Related Id(s): GH-5513, OTP-17226

               Starting in OTP 24, when a fun was created and
               immediately used, it would be inlined. An unintended
               consequence of the inlining was that what would be a
               function_clause exception without the inlining would
               now be a rather confusing case_clause exception. This
               has been corrected, so that function_clause exceptions
               remain function_clause exceptions in inlined code.


 --- Improvements and New Features ---

  OTP-16702    Application(s): compiler, erts

               *** HIGHLIGHT ***

               To enable more optimizations, BEAM files compiled with
               OTP 21 and earlier cannot be loaded in OTP 25.


  OTP-17151    Application(s): compiler, erts
               Related Id(s): ERIERL-590, PR-5479

               *** HIGHLIGHT ***

               Added support for the compile attribute -nifs() to
               empower compiler and loader with information about
               which functions may be overridden as NIFs by
               erlang:load_nif/2. It is recommended to use this
               attribute in all modules that load NIF libraries.


  OTP-17504    Application(s): compiler, erts
               Related Id(s): GH-4971, PR-5281, PR-5752

               *** HIGHLIGHT ***

               When binary construction using the binary syntax fails,
               the error message printed in the shell and by
               erl_error:format_exception/3,4 will contain more
               detailed information about what went wrong.


  OTP-17684    Application(s): compiler, erts
               Related Id(s): PR-5316, PR-5664

               *** HIGHLIGHT ***

               The Erlang compiler now includes type information in
               BEAM files, and the JIT can now use that type
               information to do optimizations such as eliminating or
               simplifying type tests.


  OTP-17685    Application(s): compiler, erts

               Improved the JIT's support for external tools like perf
               and gdb, allowing them to show line numbers and even
               the original Erlang source code when that can be found.

               To aid them in finding the source code, the
               absolute_path compiler option has been added to embed
               the absolute file path of a module.


  OTP-17705    Application(s): compiler
               Related Id(s): PR-5411

               *** HIGHLIGHT ***

               The maybe ... end construction proposed in EEP-49 has
               been implemented. It can simplify complex code where
               otherwise deeply nested cases would have to be used.

               To enable maybe, give the option -enable-feature
               maybe_expr to erlc or add -feature(enable, maybe_expr).
               inside the module.


  OTP-17810    Application(s): compiler
               Related Id(s): GH-5379

               A subtle bug regarding variable scoping has been
               corrected. Consider this example:

               (A=1) + fun() -> A = 2() end

               In the shell, the expression correctly evaluates to 3.
               In compiled code, it raised a {badmatch, 2} exception.


  OTP-17841    Application(s): compiler, erts
               Related Id(s): PR-5694

               *** HIGHLIGHT ***

               When a record matching or record update fails, a
               {badrecord,ExpectedRecordTag} exception used to be
               raised. In this release, the exception has been changed
               to {badrecord,ActualValue}, where ActualValue is the
               actual that was found instead of the expected record.


  OTP-17842    Application(s): compiler

               Improved optimization of try/catch expressions.


  OTP-17885    Application(s): compiler
               Related Id(s): GH-5140

               The beam_trim pass of the compiler could be extremely
               slow for huge straight-line functions. It will now
               compile such functions much faster (down to seconds
               from minutes for some huge functions).


  OTP-17988    Application(s): compiler, kernel, stdlib, syntax_tools

               *** HIGHLIGHT ***

               Added support for selectable features as described in
               EEP-60. Features can be enabled/disabled during
               compilation with options (ordinary and +term) to erlc
               as well as with directives in the file. Similar options
               can be used to erl for enabling/disabling features
               allowed at runtime. The new maybe expression (EEP-49)
               is fully supported as the feature maybe_expr.


  OTP-18039    Application(s): compiler

               *** HIGHLIGHT ***

               Change format of feature options and directives for
               better consistency. Options to erlc and the
               -compile(..) directive now has the format {feature,
               feature-name, enable | disable}. The -feature(..) now
               has the format -feature(feature-name, enable |
               disable).


 Full runtime dependencies of compiler-8.2: crypto-5.1, erts-13.0,
 kernel-8.4, stdlib-4.0


 ---------------------------------------------------------------------
 --- crypto-5.1 ------------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17984    Application(s): crypto

               Remove faulty types run_time_error() and
               descriptive_error().


 --- Improvements and New Features ---

  OTP-16643    Application(s): crypto
               Related Id(s): OTP-16282

               The deprecated low-level DH API is not used when crypto
               is compiled with OpenSSL 3.0.


  OTP-16644    Application(s): crypto
               Related Id(s): OTP-16282

               The deprecated low-level RSA API is not used when
               crypto is compiled with OpenSSL 3.0.


  OTP-17414    Application(s): common_test, crypto, erl_interface,
               erts, megaco, odbc, otp, snmp, wx
               Related Id(s): PR-4967

               Input for configure scripts adapted to autoconf 2.71.


  OTP-17471    Application(s): crypto
               Related Id(s): PR-4750

               Add crypto:hash_equals/2


  OTP-17561    Application(s): crypto

               Add /opt/homebrew/opt/openssl to standard locations to
               search for OpenSSL cryptolib.


  OTP-17701    Application(s): crypto
               Related Id(s): OTP-16282

               The deprecated low-level DSA API is not used when
               crypto is compiled with OpenSSL 3.0.


  OTP-17704    Application(s): crypto
               Related Id(s): OTP-16282

               The deprecated BN_pseudo_rand_range is not used when
               crypto is compiled with OpenSSL 3.0.


  OTP-17870    Application(s): crypto

               crypto_dyn_iv_init/3 and crypto_dyn_iv_update/3 are
               deprecated.


  OTP-17965    Application(s): crypto

               *** POTENTIAL INCOMPATIBILITY ***

               The infomation in error messages are increased.

               Previously the error was signaled with en error class
               exception badarg, notsup or error, and also in some
               more ways like an other exception or a return value in
               a non-standardized format.

               Now it is an error-class exception
               {notsup|badarg|error, InfoFromCfile,
               Description::string()}.

               The InfoFromCfile is a term with name and line number
               of the C-file where the error was found. This is
               primarily intended for a crypto maitntainer or an
               advanced user to find the cause of complicated errors -
               maybe in crypto itself. The contents of that term might
               be changed in the future.

               The Description is a clear text string that describes
               the error. In case of badarg and notsup the intention
               is that it should help the user to find the cause ("Bad
               key size" as an example). Specially for some error that
               are unlikely, the string may not be possible to
               understand without deep knowledge of the underlying
               cryptolib. Such messages are intended for a crypto
               maintainer.

               The first element on call stack (the S in try ... catch
               error:E:S .... end) gives more information like the
               actual argument list in the call of crypto and the
               argument number (if possible) in the call to the NIF
               inside crypto.

               The functions in crypto affected by this change are:

               sign/4, sign/5, verify/5, verify/6,

               generate_key/2, generate_key/3, compute_key/4,

               hash/2, hash/4, hash_init/1, hash_update/4,
               hash_final/1,

               mac/3,4, mac_init/3, mac_update/2, mac_final/2,

               pbkdf2_hmac/5,

               public_encrypt/4, private_decrypt/4, private_encrypt/4,
               public_decrypt/4

               This schema was introduced earlier in:

               crypto_init/3, crypto_init/4, crypto_update/2,
               crypto_final/1, crypto_get_data/1,

               crypto_one_time/4, crypto_one_time/5,
               crypto_one_time_aead/6, crypto_one_time_aead/7


 Full runtime dependencies of crypto-5.1: erts-9.0, kernel-5.3,
 stdlib-3.9


 ---------------------------------------------------------------------
 --- debugger-5.3 ----------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17554    Application(s): debugger, erts, kernel, observer,
               stdlib
               Related Id(s): GH-5016, OTP-17821, PR-5408

               The configuration files .erlang, .erlang.cookie and
               .erlang.crypt can now be located in the XDG Config Home
               directory.

               See the documentation for each file and
               filename:basedir/2 for more details.


 Full runtime dependencies of debugger-5.3: compiler-8.0, erts-12.0,
 kernel-8.0, stdlib-3.15, wx-2.0


 ---------------------------------------------------------------------
 --- dialyzer-5.0 ----------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17644    Application(s): dialyzer
               Related Id(s): PR-5223

               *** POTENTIAL INCOMPATIBILITY ***

               Fixed a bug that could cause the type analyzer to enter
               an infinite loop.


 --- Improvements and New Features ---

  OTP-17524    Application(s): dialyzer

               Optimize operations in the erl_types module.
               Parallelize the Dialyzer pass remote.


  OTP-17654    Application(s): dialyzer
               Related Id(s): GH-5214

               Added the missing_return and extra_return options to
               raise warnings when specifications differ from inferred
               types. These are similar to, but not quite as verbose
               as overspecs and underspecs.


  OTP-17819    Application(s): dialyzer

               The race_conditions option has been removed.


  OTP-17821    Application(s): dialyzer
               Related Id(s): GH-5016, OTP-17554, PR-5408

               *** POTENTIAL INCOMPATIBILITY ***

               The default location of the plt has been changed from
               $HOME to filename:basedir(user_cache,"erlang").


  OTP-17826    Application(s): dialyzer
               Related Id(s): PR-5498

               dialyzer will now honor dependencies inside type
               declarations. That is, if the declaration of an
               exported type changes, all modules using said type will
               be revisited.


  OTP-17897    Application(s): dialyzer
               Related Id(s): PR-5651

               Dialyzer now better understands the types for min/2,
               max/2, and erlang:raise/3. Because of that, Dialyzer
               can potentially generate new warnings. In particular,
               functions that use erlang:raise/3 could now need a spec
               with a no_return() return type to avoid an unwanted
               warning.


  OTP-17964    Application(s): dialyzer
               Related Id(s): PR-5660

               The typer_core module has been added to provide an
               Erlang API for running typer.


  OTP-18035    Application(s): dialyzer
               Related Id(s): PR-5802

               Added the --annotate-in-place option to typer, which
               can be used to annotate the specs that the tool
               inferred directly into the source code files.


 Full runtime dependencies of dialyzer-5.0: compiler-8.0, erts-12.0,
 kernel-8.0, stdlib-3.15, syntax_tools-2.0, wx-2.0


 ---------------------------------------------------------------------
 --- diameter-2.2.6 --------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17976    Application(s): diameter
               Related Id(s): GH-5463

               Fix decode of non-IP address types; that is, of values
               of the derived AVP data format Address whose first two
               octets specify an address family other than 1 (IP) or 2
               (IP6). Such values have never been decoded, and were
               treated as decode errors. They're now decoded to a
               2-tuple of the integer() address family and binary()
               remaining octets, with no family-specific decode. The
               2-tuple distinguishes the decode from the 4-tuple and
               8-tuple IP address decodes. 2-tuples are also now
               encoded.

               Note that even currently unassigned address families
               are decoded: only the reserved values, 0 and 65535, are
               treated as errors.


 Full runtime dependencies of diameter-2.2.6: erts-10.0, kernel-3.2,
 ssl-9.0, stdlib-3.0


 ---------------------------------------------------------------------
 --- edoc-1.2 --------------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17550    Application(s): edoc
               Related Id(s): GH-5094, PR-5106

               Fix unused types warnings in internal edoc module.


 --- Improvements and New Features ---

  OTP-17556    Application(s): edoc
               Related Id(s): PR-5023

               Add source file to the warning on skipped tags when
               generating EEP-48 style docs.


  OTP-17733    Application(s): edoc
               Related Id(s): PR-5205

               Fix the doc chunks generators to emit documentation
               even if there is not module level documentation.

               Fix the doc chunks generators to respect the @hidden
               and @private tags properly for both modules and
               functions.


 Full runtime dependencies of edoc-1.2: erts-6.0, inets-5.10,
 kernel-3.0, stdlib-3.15, syntax_tools-2.0, xmerl-1.3.7


 ---------------------------------------------------------------------
 --- erl_docgen-1.3 --------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17669    Application(s): erl_docgen, otp
               Related Id(s): PR-5226

               Any exported, but private function or module in
               Erlang/OTP now generate an EEP-48 style documentation
               entry with the content set to hidden.

               Before this change, exported but private functions and
               modules did not have any entry at all.


 Full runtime dependencies of erl_docgen-1.3: edoc-1.0, erts-11.0,
 kernel-8.0, stdlib-3.15, xmerl-1.3.7


 ---------------------------------------------------------------------
 --- erl_interface-5.3 -----------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17846    Application(s): erl_interface
               Related Id(s): PR-5558

               erl_call no longer links against nsl on platforms where
               gethostbyname is provided by libc.


 --- Improvements and New Features ---

  OTP-17318    Application(s): erl_interface, erts, jinterface,
               kernel
               Related Id(s): PR-4972

               The following distribution flags are now mandatory:
               DFLAG_BIT_BINARIES, DFLAG_EXPORT_PTR_TAG,
               DFLAG_MAP_TAGS, DFLAG_NEW_FLOATS, and DFLAG_FUN_TAGS.
               This mainly concerns libraries or application that
               implement the distribution protocol themselves.


  OTP-17414    Application(s): common_test, crypto, erl_interface,
               erts, megaco, odbc, otp, snmp, wx
               Related Id(s): PR-4967

               Input for configure scripts adapted to autoconf 2.71.


  OTP-17682    Application(s): erl_interface, erts, jinterface
               Related Id(s): PR-5347

               Removed use of node creation value zero as a wildcard.
               Also prevent zero from being used as creation by
               erl_interface and jinterface nodes.


  OTP-17802    Application(s): erl_interface
               Related Id(s): PR-5347

               Changed creation arguments, of function ei_connet_init
               and friends, from type short to unsigned int for full
               32-bit range.


 --- Known Bugs and Problems ---

  OTP-16607    Application(s): erl_interface
               Related Id(s): OTP-16608

               The ei API for decoding/encoding terms is not fully
               64-bit compatible since terms that have a
               representation on the external term format larger than
               2 GB cannot be handled.


 ---------------------------------------------------------------------
 --- erts-13.0 -------------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17447    Application(s): erts, kernel
               Related Id(s): GH-4819

               The socket option 'reuseaddr' is *no longer* ignored on
               Windows.


  OTP-17569    Application(s): erts
               Related Id(s): PR-4793

               *** POTENTIAL INCOMPATIBILITY ***

               The growth rate of writable binaries has been adjusted
               to only increase by 20% after 16MB in size. Before this
               change the size would always double.

               This change may degrade write performance of large
               binaries.


  OTP-17661    Application(s): erts, stdlib
               Related Id(s): PR-5165

               Fix reduction counting bug in re:run that caused the
               function to yield too frequently when doing global
               matches.


  OTP-17758    Application(s): erts
               Related Id(s): PR-5391

               Fix spelling mistakes in epmd error messages.


  OTP-17779    Application(s): erts
               Related Id(s): GH-5403, PR-5599

               Fix bug where the "newshell" would trigger a newline at
               the column width of the terminal, even if the next
               character to be printed was a newline. This would cause
               the terminal to render two newlines instead of one.


  OTP-17832    Application(s): erts, stdlib
               Related Id(s): PR-5494

               Fix the memory value returned from ets:info(Tid,memory)
               when the read_concurrency option is used.

               Before this fix the memory used by the scheduler
               specific lock cache lines was not counted towards the
               total. This caused the returned memory usage to be very
               incorrect on systems with many schedulers for tables
               with man locks.


  OTP-17836    Application(s): erts
               Related Id(s): PR-5546

               Fix the undocumented --profile_boot option to work
               again.


  OTP-17970    Application(s): erts
               Related Id(s): PR-5762

               Let EPMD tolerate failure when binding to IPv4/IPv6
               loopback intefaces in addition to user-supplied
               addresses via ERL_EPMD_ADDRESS or the -address option.
               This can happen, for example, if the host system has
               ipv6 disabled via the disable_ipv6 sysctl.


  OTP-18020    Application(s): erts, kernel

               [socket] Encode of sockaddr has been improved.


  OTP-18027    Application(s): erts

               Fixed a bug in binary_to_term/1,
               enif_make_map_from_arrays, erl_drv_send_term, and
               Erlang distribution that could crash the emulator.


  OTP-18047    Application(s): erts
               Related Id(s): PR-5861

               Fix erl_child_setup (the program used by
               open_port({spawn,...}) and os:cmd/1) to better handle
               partial reads from the Erlang VM.


 --- Improvements and New Features ---

  OTP-15991    Application(s): erts, stdlib
               Related Id(s): PR-5208

               *** HIGHLIGHT ***

               Users can now configure ETS tables with the
               {write_concurrency, auto} option. This option forces
               tables to automatically change the number of locks that
               are used at run-time depending on how much concurrency
               is detected. The {decentralized_counters, true} option
               is enabled by default when {write_concurrency, auto} is
               active.

               Benchmark results comparing this option with the other
               ETS optimization options are available here:

               https://erlang.org/bench/ets_bench_result_lock_config.html


  OTP-16464    Application(s): erts, kernel

               The net module now works on Windows.


  OTP-16702    Application(s): compiler, erts

               *** HIGHLIGHT ***

               To enable more optimizations, BEAM files compiled with
               OTP 21 and earlier cannot be loaded in OTP 25.


  OTP-16852    Application(s): erts
               Related Id(s): ERL-1347, PR-5195

               Optimize minor garbage collection for processes with
               large number of binaries, funs and/or external
               pids/ports/refs. This is a continuation of the
               optimization (OTP-17602) released in OTP-24.1.


  OTP-16982    Application(s): erts
               Related Id(s): PR-5020

               *** HIGHLIGHT ***

               The signal queue of a process with
               message_queue_data=off_heap* has been optimized to
               allow parallel reception of signals from multiple
               processes.

               This is possible to do as Erlang only guarantees that
               signals (i.e., message signals and non-message signals)
               sent from a single process to another process are
               ordered in send order. However, there are no ordering
               guarantees for signals sent from different processes to
               a particular process. Therefore, several processes can
               send signals in parallel to a specific process without
               synchronizing with each other. However, such signal
               sending was previously always serialized as the senders
               had to acquire the lock for the outer signal queue of
               the receiving process. This parallel signal sending
               optimization yields much better scalability for signal
               sending than what was previously possible, see
               https://erlang.org/bench/sigq_bench_result.html for
               benchmark results.

               * Information about how to enable the
               message_queue_data=off_heap setting can be found in the
               documentation of the function erlang:process_flag/2.


  OTP-17119    Application(s): erts
               Related Id(s): PR-4869

               *** HIGHLIGHT ***

               The JIT now works for 64-bit ARM processors.


  OTP-17151    Application(s): compiler, erts
               Related Id(s): ERIERL-590, PR-5479

               *** HIGHLIGHT ***

               Added support for the compile attribute -nifs() to
               empower compiler and loader with information about
               which functions may be overridden as NIFs by
               erlang:load_nif/2. It is recommended to use this
               attribute in all modules that load NIF libraries.


  OTP-17224    Application(s): erts, otp

               A test case has been added to the otp_SUITE that test
               that the dependency versions for OTP's applications are
               correct. The test case uses xref to check if the used
               functions are available in the specified dependency
               versions. The test case depends on the Erlang/OTP
               team's testing infrastructure and will be skipped if
               its dependencies are not met.


  OTP-17304    Application(s): erts, kernel, sasl

               An Erlang installation directory is now relocatable on
               the file system given that the paths in the
               installation's RELEASES file are paths that are
               relative to the installations root directory. The
               `release_handler:create_RELEASES/4 function can
               generate a RELEASES file with relative paths if its
               RootDir parameter is set to the empty string.


  OTP-17318    Application(s): erl_interface, erts, jinterface,
               kernel
               Related Id(s): PR-4972

               The following distribution flags are now mandatory:
               DFLAG_BIT_BINARIES, DFLAG_EXPORT_PTR_TAG,
               DFLAG_MAP_TAGS, DFLAG_NEW_FLOATS, and DFLAG_FUN_TAGS.
               This mainly concerns libraries or application that
               implement the distribution protocol themselves.


  OTP-17414    Application(s): common_test, crypto, erl_interface,
               erts, megaco, odbc, otp, snmp, wx
               Related Id(s): PR-4967

               Input for configure scripts adapted to autoconf 2.71.


  OTP-17504    Application(s): compiler, erts
               Related Id(s): GH-4971, PR-5281, PR-5752

               *** HIGHLIGHT ***

               When binary construction using the binary syntax fails,
               the error message printed in the shell and by
               erl_error:format_exception/3,4 will contain more
               detailed information about what went wrong.


  OTP-17554    Application(s): debugger, erts, kernel, observer,
               stdlib
               Related Id(s): GH-5016, OTP-17821, PR-5408

               The configuration files .erlang, .erlang.cookie and
               .erlang.crypt can now be located in the XDG Config Home
               directory.

               See the documentation for each file and
               filename:basedir/2 for more details.


  OTP-17555    Application(s): erts
               Related Id(s): PR-5027

               Make byte_size/1 and binary_part/2/3 callable from
               match specs (in ETS and tracing).


  OTP-17558    Application(s): erts, kernel
               Related Id(s): GH-5402, OTP-17538, PR-5111

               Dynamic node name improvements: erlang:is_alive/0
               changed to return true for pending dynamic node name
               and new function net_kernel:get_state/0.


  OTP-17562    Application(s): erts
               Related Id(s): GH-4492

               A new option called short has been added to the
               functions erlang:float_to_list and
               erlang:float_to_binary. This option creates the
               shortest correctly rounded string representation of the
               given float that can be converted back to the same
               float again.


  OTP-17608    Application(s): erts, kernel, stdlib

               The tagged tuple tests and fun-calls have been
               optimized and are now a little bit cheaper than
               previously.

               These optimizations become possible after making sure
               that all boxed terms have at least one word allocated
               after the arity word. This has been accomplished by
               letting all empty tuples refer to the same empty tuple
               literal which also reduces memory usage for empty
               tuples.


  OTP-17630    Application(s): erts, stdlib

               The signal queue benchmark in parallel_messages_SUITE
               and the ETS benchmark in ets_SUITE have benchmark
               result visualization HTML pages with "fill-screen"
               buttons to make the graphs bigger. This button did not
               work as intended before. When pressing the button for a
               graph, the last graph got replaced with a bigger
               version and not the one over the button. This is now
               fixed.


  OTP-17636    Application(s): erts

               The test case num_bif_SUITE:t_float_to_string
               previously failed sometimes as it assumed a certain
               rounding of floats printed with sprintf but the
               rounding type is platform specific.


  OTP-17660    Application(s): erts
               Related Id(s): PR-5164

               Optimize interpreter to create heap binaries of small
               match contexts if possible.

               This optimization was already done in the JIT.


  OTP-17667    Application(s): erts
               Related Id(s): PR-5237

               Optimize integer multiplication for x86 JIT


  OTP-17682    Application(s): erl_interface, erts, jinterface
               Related Id(s): PR-5347

               Removed use of node creation value zero as a wildcard.
               Also prevent zero from being used as creation by
               erl_interface and jinterface nodes.


  OTP-17683    Application(s): erts
               Related Id(s): PR-5306

               *** POTENTIAL INCOMPATIBILITY ***

               Distributed spawn operations now require distributed
               spawn_request() support. Distributed spawn_request()
               was introduced in OTP 23. That is, distributed spawn
               operations against Erlang nodes of releases prior to
               OTP 23 will fail.


  OTP-17684    Application(s): compiler, erts
               Related Id(s): PR-5316, PR-5664

               *** HIGHLIGHT ***

               The Erlang compiler now includes type information in
               BEAM files, and the JIT can now use that type
               information to do optimizations such as eliminating or
               simplifying type tests.


  OTP-17685    Application(s): compiler, erts

               Improved the JIT's support for external tools like perf
               and gdb, allowing them to show line numbers and even
               the original Erlang source code when that can be found.

               To aid them in finding the source code, the
               absolute_path compiler option has been added to embed
               the absolute file path of a module.


  OTP-17717    Application(s): erts
               Related Id(s): PR-5290

               Add [32-bit] to the Erlang shell title row for 32-bit
               VMs.


  OTP-17728    Application(s): erts
               Related Id(s): PR-5284

               Instructions for how to build the runtime system for
               iOS/iPadOS can now be found in HOWTO/INSTALL.md.


  OTP-17729    Application(s): erts
               Related Id(s): PR-5477

               Add support for static Elixir NIF modules with
               non-alphanumeric characters by using new macro
               STATIC_ERLANG_NIF_LIBNAME.


  OTP-17753    Application(s): erts
               Related Id(s): GH-5297, PR-5305

               Add new function caller_line to for trace match
               specifications used by erlang:trace_pattern/3.

               This new option puts the line number of the caller into
               the trace message sent to the trace receiver.


  OTP-17762    Application(s): erts
               Related Id(s): GH-5204, PR-5219

               A new erl command line argument +ssrct has been
               introduced which will cause the runtime system to skip
               reading CPU topology information. This reduce startup
               time especially when the CPU topology is large. Reading
               of CPU topology information is now also skipped if a
               user defined CPU topology is set using the +sct command
               line argument.


  OTP-17772    Application(s): erts
               Related Id(s): GH-4965, PR-5644

               The default time warp mode will change in Erlang/OTP
               26. Added a warning about this upcoming potential
               incompatibility to the documentation.


  OTP-17824    Application(s): erts

               The emulator will no longer mark unused memory as
               discardable (e.g. through madvise(2)), as it caused
               more problems than it solved.


  OTP-17841    Application(s): compiler, erts
               Related Id(s): PR-5694

               *** HIGHLIGHT ***

               When a record matching or record update fails, a
               {badrecord,ExpectedRecordTag} exception used to be
               raised. In this release, the exception has been changed
               to {badrecord,ActualValue}, where ActualValue is the
               actual that was found instead of the expected record.


  OTP-17892    Application(s): erts, tools
               Related Id(s): PR-5591

               Removed the previously undocumented and unsupported
               emem tool.


  OTP-17899    Application(s): erts
               Related Id(s): PR-5524

               Remove version number from the default install path on
               Windows.


  OTP-17927    Application(s): erts
               Related Id(s): PR-5283

               On Windows apply the limit flag
               JOB_OBJECT_LIMIT_BREAKAWAY_OK in the Erlang service to
               be able to start a OS child process with a different
               session number.


  OTP-17945    Application(s): erts
               Related Id(s): GH-4759, PR-5809

               New erl command line option +IOs. It can be used to
               disable scheduler thread poll optimization, which has
               been seen to cause degraded event latency in some use
               cases.


  OTP-17951    Application(s): erts, kernel
               Related Id(s): PR-5656

               An API for multihomed SCTP connect has been added in
               the guise of gen_sctp:connectx_init/*


  OTP-17968    Application(s): erts, kernel
               Related Id(s): OTP-16464

               [socket] Add encoding of the field hatype of the type
               sockaddr_ll (family 'packet').


  OTP-17985    Application(s): erts
               Related Id(s): GH-5728

               A cross compilation issue has been fixed about finding
               libdlpi during the configure phase.


  OTP-17999    Application(s): erts
               Related Id(s): PR-5768

               process_info/2 now also accepts parent as argument.
               When passed, the process identifier of the parent
               process will be returned.


  OTP-18033    Application(s): erts
               Related Id(s): GH-5376, PR-2926

               The exported type erlang:send_destination/0 has been
               introduced.


  OTP-18036    Application(s): erts
               Related Id(s): PR-5846

               Building of the C/C++ make dependencies on Windows has
               been optimized to be a lot faster.


  OTP-18038    Application(s): erts

               file:sync/1 will now use the F_BARRIERFSYNC flag when
               available on Mac OS.


 Full runtime dependencies of erts-13.0: kernel-8.3, sasl-3.3,
 stdlib-4.0


 ---------------------------------------------------------------------
 --- eunit-2.7.1 -----------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17884    Application(s): eunit
               Related Id(s): GH-5617

               Minor internal improvements.


 Full runtime dependencies of eunit-2.7.1: erts-9.0, kernel-5.3,
 stdlib-3.4


 ---------------------------------------------------------------------
 --- inets-8.0 -------------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17627    Application(s): inets, stdlib

               *** POTENTIAL INCOMPATIBILITY ***

               Adjust uri_string:normalize behavior for URIs with
               undefined port (URI string with a port colon but no
               port value or URI map with port => undefined).

               Remove redundant normalization from http_request
               module.

               Before this change, normalize would not remove port
               subcomponent in such cases and could for example return
               "http://localhost:" URI.


  OTP-17889    Application(s): inets

               *** POTENTIAL INCOMPATIBILITY ***

               Fixed typo in Reason term returned from
               httpc_handler:handle_http_body.

               After this change, could_not_establish_ssl_tunnel atom
               is returned within Reason term.


 --- Improvements and New Features ---

  OTP-17866    Application(s): inets

               *** POTENTIAL INCOMPATIBILITY ***

               This change removes deprecated functions:
               http_uri:parse/1, http_uri:parse/2 and
               http_uri:scheme_defaults/0.

               This change delays until OTP-26 removal of deprecated
               functions: http_uri:encode/1 and http_uri:decode/1.

               This change marks httpd_util:decode_hex/1 and
               httpd_util:encode_hex/1 as deprecated.


  OTP-17997    Application(s): inets
               Related Id(s): GH-5782

               After this change, connect_timeout value is re-used
               when upgrading TCP connection to TLS over a proxy.


 Full runtime dependencies of inets-8.0: erts-6.0, kernel-6.0,
 mnesia-4.12, runtime_tools-1.8.14, ssl-9.0, stdlib-4.0


 ---------------------------------------------------------------------
 --- jinterface-1.13 -------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17318    Application(s): erl_interface, erts, jinterface,
               kernel
               Related Id(s): PR-4972

               The following distribution flags are now mandatory:
               DFLAG_BIT_BINARIES, DFLAG_EXPORT_PTR_TAG,
               DFLAG_MAP_TAGS, DFLAG_NEW_FLOATS, and DFLAG_FUN_TAGS.
               This mainly concerns libraries or application that
               implement the distribution protocol themselves.


  OTP-17682    Application(s): erl_interface, erts, jinterface
               Related Id(s): PR-5347

               Removed use of node creation value zero as a wildcard.
               Also prevent zero from being used as creation by
               erl_interface and jinterface nodes.


  OTP-17961    Application(s): jinterface
               Related Id(s): PR-4839

               Add new abstract class OtpGenericTransportFactory to
               allow implementation of any transport protocol without
               dependency on epmd.


 ---------------------------------------------------------------------
 --- kernel-8.4 ------------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17323    Application(s): kernel

               The DNS resolver implementation has been rewritten to
               validate replies more thoroughly, and a bit optimized
               to create less garbage.


  OTP-17447    Application(s): erts, kernel
               Related Id(s): GH-4819

               The socket option 'reuseaddr' is *no longer* ignored on
               Windows.


  OTP-17551    Application(s): kernel
               Related Id(s): GH-5071, PR-5075

               Fix bug where using the atoms string or report as the
               format when calling logger:log(Level, Format, Args) (or
               any other logging function) would cause a crash or
               incorrect logging.


  OTP-17911    Application(s): kernel
               Related Id(s): OTP-17843, PR-5611, PR-5687

               *** HIGHLIGHT ***

               *** POTENTIAL INCOMPATIBILITY ***

               As of OTP 25, global will by default prevent
               overlapping partitions due to network issues by
               actively disconnecting from nodes that reports that
               they have lost connections to other nodes. This will
               cause fully connected partitions to form instead of
               leaving the network in a state with overlapping
               partitions.

               Prevention of overlapping partitions can be disabled
               using the prevent_overlapping_partitions kernel(6)
               parameter, making global behave like it used to do.
               This is, however, problematic for all applications
               expecting a fully connected network to be provided,
               such as for example mnesia, but also for global itself.
               A network of overlapping partitions might cause the
               internal state of global to become inconsistent. Such
               an inconsistency can remain even after such partitions
               have been brought together to form a fully connected
               network again. The effect on other applications that
               expects that a fully connected network is maintained
               may vary, but they might misbehave in very subtle hard
               to detect ways during such a partitioning. Since you
               might get hard to detect issues without this fix, you
               are strongly advised not to disable this fix. Also note
               that this fix has to be enabled on all nodes in the
               network in order to work properly.


  OTP-17958    Application(s): kernel
               Related Id(s): OTP-17978

               Starting the helper program for name resolving;
               inet_gethost, has been improved to use an absolute file
               system path to ensure that the right program is
               started.

               If the helper program can not be started - the system
               now halts, to avoid running with a silently broken name
               resolver.


  OTP-17986    Application(s): kernel
               Related Id(s): PR-5412

               The type specification for inet_res:getbyname/2,3 has
               been corrected to reflect that it can return peculiar
               #hostent{} records.


  OTP-17990    Application(s): kernel
               Related Id(s): GH-5801

               code:module_status/1 would always report BEAM files
               loaded from an archive as modified, and
               code:modified_modules/0 would always return the name of
               all modules loaded from archives.


  OTP-18001    Application(s): kernel
               Related Id(s): GH-5780, PR-5829

               In logger fix file handler shutdown delay by using
               erlang timers instead of the timer modul's timers.


  OTP-18003    Application(s): kernel
               Related Id(s): PR-5771

               Fix the metadata in log events generated by logger on
               failure to not contain the original log event's
               metadata.


  OTP-18015    Application(s): kernel
               Related Id(s): GH-5828, PR-5845

               Fix logger file backend to re-create the log folder if
               it has been deleted.


  OTP-18020    Application(s): erts, kernel

               [socket] Encode of sockaddr has been improved.


 --- Improvements and New Features ---

  OTP-16464    Application(s): erts, kernel

               The net module now works on Windows.


  OTP-17304    Application(s): erts, kernel, sasl

               An Erlang installation directory is now relocatable on
               the file system given that the paths in the
               installation's RELEASES file are paths that are
               relative to the installations root directory. The
               `release_handler:create_RELEASES/4 function can
               generate a RELEASES file with relative paths if its
               RootDir parameter is set to the empty string.


  OTP-17318    Application(s): erl_interface, erts, jinterface,
               kernel
               Related Id(s): PR-4972

               The following distribution flags are now mandatory:
               DFLAG_BIT_BINARIES, DFLAG_EXPORT_PTR_TAG,
               DFLAG_MAP_TAGS, DFLAG_NEW_FLOATS, and DFLAG_FUN_TAGS.
               This mainly concerns libraries or application that
               implement the distribution protocol themselves.


  OTP-17479    Application(s): kernel
               Related Id(s): PR-4917

               Fix os:cmd to work on Android OS.


  OTP-17554    Application(s): debugger, erts, kernel, observer,
               stdlib
               Related Id(s): GH-5016, OTP-17821, PR-5408

               The configuration files .erlang, .erlang.cookie and
               .erlang.crypt can now be located in the XDG Config Home
               directory.

               See the documentation for each file and
               filename:basedir/2 for more details.


  OTP-17558    Application(s): erts, kernel
               Related Id(s): GH-5402, OTP-17538, PR-5111

               Dynamic node name improvements: erlang:is_alive/0
               changed to return true for pending dynamic node name
               and new function net_kernel:get_state/0.


  OTP-17589    Application(s): kernel
               Related Id(s): PR-4926

               The types for callback result types in gen_statem has
               bee augmented with arity 2 types where it is possible
               for a callback module to specify the type of the
               callback data, so the callback module can get type
               validation of it.


  OTP-17608    Application(s): erts, kernel, stdlib

               The tagged tuple tests and fun-calls have been
               optimized and are now a little bit cheaper than
               previously.

               These optimizations become possible after making sure
               that all boxed terms have at least one word allocated
               after the arity word. This has been accomplished by
               letting all empty tuples refer to the same empty tuple
               literal which also reduces memory usage for empty
               tuples.


  OTP-17617    Application(s): kernel
               Related Id(s): PR-5069

               A net_ticker_spawn_options kernel configuration
               parameter with which one can set spawn options for the
               distribution channel ticker processes has been
               introduced.


  OTP-17681    Application(s): kernel
               Related Id(s): PR-5307

               *** POTENTIAL INCOMPATIBILITY ***

               The most, or at least the most used, rpc operations now
               require erpc support in order to communicate with other
               Erlang nodes. erpc was introduced in OTP 23. That is,
               rpc operations against Erlang nodes of releases prior
               to OTP 23 will fail.


  OTP-17720    Application(s): common_test, kernel, stdlib
               Related Id(s): PR-5162

               *** HIGHLIGHT ***

               The new module peer supersedes the slave module. The
               slave module is now deprecated and will be removed in
               OTP 27.

               peer contains an extended and more robust API for
               starting erlang nodes.


  OTP-17784    Application(s): kernel, stdlib
               Related Id(s): PR-5792

               *** HIGHLIGHT ***

               In order to make it easier for the user to manage
               multiple outstanding asynchronous call requests, new
               functionality utilizing request identifier collections
               have been introduced in erpc, gen_server, gen_statem,
               and gen_event.


  OTP-17915    Application(s): kernel, stdlib
               Related Id(s): GH-2375, GH-2690, PR-5751

               Type specifications have been added to the gen_server,
               and the documentation has been updated to utilize this.

               This surfaced a few type violations that has been
               corrected in global, logger_olp and rpc.


  OTP-17923    Application(s): kernel
               Related Id(s): PR-5646

               IP address validation functions is_ipv4_address/1,
               is_ipv6_address/1 and is_ip_address/1 have been added
               to the module inet in Kernel.


  OTP-17951    Application(s): erts, kernel
               Related Id(s): PR-5656

               An API for multihomed SCTP connect has been added in
               the guise of gen_sctp:connectx_init/*


  OTP-17968    Application(s): erts, kernel
               Related Id(s): OTP-16464

               [socket] Add encoding of the field hatype of the type
               sockaddr_ll (family 'packet').


  OTP-17988    Application(s): compiler, kernel, stdlib, syntax_tools

               *** HIGHLIGHT ***

               Added support for selectable features as described in
               EEP-60. Features can be enabled/disabled during
               compilation with options (ordinary and +term) to erlc
               as well as with directives in the file. Similar options
               can be used to erl for enabling/disabling features
               allowed at runtime. The new maybe expression (EEP-49)
               is fully supported as the feature maybe_expr.


 Full runtime dependencies of kernel-8.4: crypto-5.0, erts-13.0,
 sasl-3.0, stdlib-4.0


 ---------------------------------------------------------------------
 --- megaco-4.4 ------------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17414    Application(s): common_test, crypto, erl_interface,
               erts, megaco, odbc, otp, snmp, wx
               Related Id(s): PR-4967

               Input for configure scripts adapted to autoconf 2.71.


  OTP-17910    Application(s): megaco

               Megaco test suite(s) use the new peer module for node
               starts.


 Full runtime dependencies of megaco-4.4: asn1-3.0, debugger-4.0,
 erts-12.0, et-1.5, kernel-8.0, runtime_tools-1.8.14, stdlib-2.5


 ---------------------------------------------------------------------
 --- mnesia-4.21 -----------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17930    Application(s): mnesia

               Documentation fixes.


 Full runtime dependencies of mnesia-4.21: erts-9.0, kernel-5.3,
 stdlib-3.4


 ---------------------------------------------------------------------
 --- observer-2.12 ---------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17996    Application(s): observer
               Related Id(s): PR-5795

               Fixed default handling of Mac specific menus.


  OTP-18012    Application(s): observer, runtime_tools
               Related Id(s): #5798

               Reading port socket options on macOS and Windows
               "skips" invalid options.


 --- Improvements and New Features ---

  OTP-17554    Application(s): debugger, erts, kernel, observer,
               stdlib
               Related Id(s): GH-5016, OTP-17821, PR-5408

               The configuration files .erlang, .erlang.cookie and
               .erlang.crypt can now be located in the XDG Config Home
               directory.

               See the documentation for each file and
               filename:basedir/2 for more details.


 Full runtime dependencies of observer-2.12: erts-11.0, et-1.5,
 kernel-8.1, runtime_tools-1.19, stdlib-3.13, wx-1.2


 ---------------------------------------------------------------------
 --- odbc-2.14 -------------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17414    Application(s): common_test, crypto, erl_interface,
               erts, megaco, odbc, otp, snmp, wx
               Related Id(s): PR-4967

               Input for configure scripts adapted to autoconf 2.71.


 Full runtime dependencies of odbc-2.14: erts-6.0, kernel-3.0,
 stdlib-2.0


 ---------------------------------------------------------------------
 --- parsetools-2.4 --------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17755    Application(s): parsetools

               In the generated code, yecc will now quote all atoms
               coming from terminals in the grammar, in order to avoid
               conflicts with future reserved words.


 Full runtime dependencies of parsetools-2.4: erts-6.0, kernel-3.0,
 stdlib-3.4


 ---------------------------------------------------------------------
 --- public_key-1.13 -------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17890    Application(s): public_key, ssl

               Allow key file passwords to be input as a single
               binary, that is we change the datatype to be the more
               for the purpose logical data type iodata() instead of
               string().


  OTP-17921    Application(s): public_key

               *** POTENTIAL INCOMPATIBILITY ***

               The deprecated public_key functions ssh_decode/2,
               ssh_encode/2, ssh_hostkey_fingerprint/1 and
               ssh_hostkey_fingerprint/2 are removed.

               They are replaced by ssh_file:decode/2,
               ssh_file:encode/2, ssh:hostkey_fingerprint/1 and
               ssh:hostkey_fingerprint/2 respectively.

               Note that the decode/2 and encode/2 are not exact
               replacement functions, some minor changes may be
               needed. Se the manual for more information.


 Full runtime dependencies of public_key-1.13: asn1-3.0, crypto-4.6,
 erts-6.0, kernel-3.0, stdlib-3.5


 ---------------------------------------------------------------------
 --- runtime_tools-1.19 ----------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-18012    Application(s): observer, runtime_tools
               Related Id(s): #5798

               Reading port socket options on macOS and Windows
               "skips" invalid options.


 --- Improvements and New Features ---

  OTP-17909    Application(s): runtime_tools
               Related Id(s): ERIERL-760

               dbg:stop/0 now behaves like dbg:stop_clear/0, clearing
               all global trace patterns for all functions.


  OTP-17939    Application(s): runtime_tools

               erts_alloc_config has been scheduled for removal in OTP
               26. It has not produced good configurations for a very
               long time, and unfortunately it cannot be fixed in a
               backwards compatible manner.


 Full runtime dependencies of runtime_tools-1.19: erts-11.0,
 kernel-8.1, mnesia-4.12, stdlib-3.13


 ---------------------------------------------------------------------
 --- sasl-4.2 --------------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17752    Application(s): sasl
               Related Id(s): PR-5302

               Fix systools:make* to recursively search for source
               code when doing a src_tests.


 --- Improvements and New Features ---

  OTP-17304    Application(s): erts, kernel, sasl

               An Erlang installation directory is now relocatable on
               the file system given that the paths in the
               installation's RELEASES file are paths that are
               relative to the installations root directory. The
               `release_handler:create_RELEASES/4 function can
               generate a RELEASES file with relative paths if its
               RootDir parameter is set to the empty string.


 Full runtime dependencies of sasl-4.2: erts-10.2, kernel-6.0,
 stdlib-3.4, tools-2.6.14


 ---------------------------------------------------------------------
 --- snmp-5.13 -------------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17414    Application(s): common_test, crypto, erl_interface,
               erts, megaco, odbc, otp, snmp, wx
               Related Id(s): PR-4967

               Input for configure scripts adapted to autoconf 2.71.


  OTP-17612    Application(s): snmp

               Removed deprecated functions slated for removal in
               OTP-25. Also removed "dead" code, kept for backward
               compatibility reasons.


 Full runtime dependencies of snmp-5.13: crypto-4.6, erts-12.0,
 kernel-8.0, mnesia-4.12, runtime_tools-1.8.14, stdlib-2.5


 ---------------------------------------------------------------------
 --- ssh-4.14 --------------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17920    Application(s): ssh

               *** POTENTIAL INCOMPATIBILITY ***

               The representation of Edward curves (ed25519 and ed448)
               inside ssh had a temporary representation (ed_pri and
               ed_pub).

               That is now changed to the public_key form. See the
               manual for more information.


 Full runtime dependencies of ssh-4.14: crypto-5.0, erts-11.0,
 kernel-6.0, public_key-1.6.1, runtime_tools-1.15.1, stdlib-3.15


 ---------------------------------------------------------------------
 --- ssl-10.8 --------------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-18014    Application(s): ssl

               Now also accepts the signature_algs_cert option in
               TLS-1.2 configuration.


 --- Improvements and New Features ---

  OTP-15993    Application(s): ssl
               Related Id(s): GH-4143

               With this change, it is possible to provide several
               certificates. Most appropriate will be selected based
               on extensions.


  OTP-17855    Application(s): ssl
               Related Id(s): PR-5328

               Add options for users to be able to set spawn_opts for
               TLS processes (sender and receiver) this may be useful
               for tuning trade-offs between CPU and Memory usage.


  OTP-17890    Application(s): public_key, ssl

               Allow key file passwords to be input as a single
               binary, that is we change the datatype to be the more
               for the purpose logical data type iodata() instead of
               string().


  OTP-18000    Application(s): ssl
               Related Id(s): PR-5790

               Logging enhancement, add location information to the
               warning log message.


 Full runtime dependencies of ssl-10.8: crypto-5.0, erts-10.0,
 inets-5.10.7, kernel-8.4, public_key-1.11.3, runtime_tools-1.15.1,
 stdlib-3.12


 ---------------------------------------------------------------------
 --- stdlib-4.0 ------------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17370    Application(s): stdlib
               Related Id(s): GH-4784

               Improve the Erlang code linter's check of unused types.


  OTP-17480    Application(s): stdlib
               Related Id(s): GH-4853, PR-4872

               Fix race condition in proc_lib:stop/3 where the process
               is not stopped when the timeout given is very short.


  OTP-17518    Application(s): stdlib
               Related Id(s): GH-4915

               Maps are now fully supported in by ms_transform.


  OTP-17544    Application(s): stdlib
               Related Id(s): PR-5008

               *** POTENTIAL INCOMPATIBILITY ***

               Fix gen_server:call with the first argument as self()
               to throw an error instead of failing with a timeout.

               The same fix has also been done for gen_statem:call/3,
               gen_event:sync_notify/2 and any other functionality
               relying on the internal gen:call/3 function.

               A similar fix was also done when using io:format/2 and
               the current group_leader was set to the current
               process.


  OTP-17566    Application(s): stdlib
               Related Id(s): GH-5093, PR-5095

               erl_pp printed unary - and + operators with a space
               between the operator and the operand. This is fixed by
               not having any space in between.


  OTP-17627    Application(s): inets, stdlib

               *** POTENTIAL INCOMPATIBILITY ***

               Adjust uri_string:normalize behavior for URIs with
               undefined port (URI string with a port colon but no
               port value or URI map with port => undefined).

               Remove redundant normalization from http_request
               module.

               Before this change, normalize would not remove port
               subcomponent in such cases and could for example return
               "http://localhost:" URI.


  OTP-17661    Application(s): erts, stdlib
               Related Id(s): PR-5165

               Fix reduction counting bug in re:run that caused the
               function to yield too frequently when doing global
               matches.


  OTP-17832    Application(s): erts, stdlib
               Related Id(s): PR-5494

               Fix the memory value returned from ets:info(Tid,memory)
               when the read_concurrency option is used.

               Before this fix the memory used by the scheduler
               specific lock cache lines was not counted towards the
               total. This caused the returned memory usage to be very
               incorrect on systems with many schedulers for tables
               with man locks.


  OTP-17878    Application(s): stdlib

               Avoid confusion by correcting the argument order in the
               gen_event crash log printout.


  OTP-18009    Application(s): stdlib
               Related Id(s): PR-5785

               *** POTENTIAL INCOMPATIBILITY ***

               Fixed string:next_grapheme/1 to return an empty binary
               in the tail for binary input for the last grapheme
               cluster.


  OTP-18034    Application(s): stdlib
               Related Id(s): GH-4622, PR-4661

               Fixed type specifications of the supervisor:sup_name/0
               and supervisor:sup_ref/0 types.


 --- Improvements and New Features ---

  OTP-15991    Application(s): erts, stdlib
               Related Id(s): PR-5208

               *** HIGHLIGHT ***

               Users can now configure ETS tables with the
               {write_concurrency, auto} option. This option forces
               tables to automatically change the number of locks that
               are used at run-time depending on how much concurrency
               is detected. The {decentralized_counters, true} option
               is enabled by default when {write_concurrency, auto} is
               active.

               Benchmark results comparing this option with the other
               ETS optimization options are available here:

               https://erlang.org/bench/ets_bench_result_lock_config.html


  OTP-17351    Application(s): stdlib
               Related Id(s): GH-4673, PR-4952

               *** HIGHLIGHT ***

               The format_status/2 callback for gen_server, gen_statem
               and gen_event has been deprecated in favor of the new
               format_status/1 callback.

               The new callback adds the possibility to limit and
               change many more things than the just the state, such
               as the last received message, the reason for
               terminating and more events specific to each type of
               behavior. See the respective modules documentation for
               more details.


  OTP-17481    Application(s): stdlib
               Related Id(s): PR-4811

               *** HIGHLIGHT ***

               The timer module has been modernized and made more
               efficient, which makes the timer server less
               susceptible to being overloaded. The timer:sleep/1
               function now accepts an arbitrarily large integer.


  OTP-17523    Application(s): stdlib
               Related Id(s): PR-4928

               Add lists:enumerate/[1,2].


  OTP-17554    Application(s): debugger, erts, kernel, observer,
               stdlib
               Related Id(s): GH-5016, OTP-17821, PR-5408

               The configuration files .erlang, .erlang.cookie and
               .erlang.crypt can now be located in the XDG Config Home
               directory.

               See the documentation for each file and
               filename:basedir/2 for more details.


  OTP-17592    Application(s): stdlib
               Related Id(s): ERIERL-663, PR-5243

               Support native time unit in calendar functions
               system_time_to_rfc3339/2 and rfc3339_to_system_time.


  OTP-17608    Application(s): erts, kernel, stdlib

               The tagged tuple tests and fun-calls have been
               optimized and are now a little bit cheaper than
               previously.

               These optimizations become possible after making sure
               that all boxed terms have at least one word allocated
               after the arity word. This has been accomplished by
               letting all empty tuples refer to the same empty tuple
               literal which also reduces memory usage for empty
               tuples.


  OTP-17630    Application(s): erts, stdlib

               The signal queue benchmark in parallel_messages_SUITE
               and the ETS benchmark in ets_SUITE have benchmark
               result visualization HTML pages with "fill-screen"
               buttons to make the graphs bigger. This button did not
               work as intended before. When pressing the button for a
               graph, the last graph got replaced with a bigger
               version and not the one over the button. This is now
               fixed.


  OTP-17720    Application(s): common_test, kernel, stdlib
               Related Id(s): PR-5162

               *** HIGHLIGHT ***

               The new module peer supersedes the slave module. The
               slave module is now deprecated and will be removed in
               OTP 27.

               peer contains an extended and more robust API for
               starting erlang nodes.


  OTP-17778    Application(s): stdlib
               Related Id(s): GH-5368

               This change introduces quote and unquote functions in
               uri_string module - a replacement for deprecated encode
               and decode functions from http_uri.


  OTP-17784    Application(s): kernel, stdlib
               Related Id(s): PR-5792

               *** HIGHLIGHT ***

               In order to make it easier for the user to manage
               multiple outstanding asynchronous call requests, new
               functionality utilizing request identifier collections
               have been introduced in erpc, gen_server, gen_statem,
               and gen_event.


  OTP-17869    Application(s): stdlib
               Related Id(s): PR-5595

               Update to the Unicode 14.0 specification.


  OTP-17901    Application(s): stdlib
               Related Id(s): GH-4968, PR-5649

               The following ets types have been renamed to a clearer
               name: tab/0 to table/0 and comp_match_spec/0 to
               compiled_match_spec/0.

               The types table_access/0 and table_type/0 have been
               exported.


  OTP-17908    Application(s): stdlib
               Related Id(s): GH-5655, PR-5669

               Add support for locating .asn1 files to the default
               search rules of filelib:find_file/1 and
               filelib:find_source/1.


  OTP-17915    Application(s): kernel, stdlib
               Related Id(s): GH-2375, GH-2690, PR-5751

               Type specifications have been added to the gen_server,
               and the documentation has been updated to utilize this.

               This surfaced a few type violations that has been
               corrected in global, logger_olp and rpc.


  OTP-17925    Application(s): stdlib
               Related Id(s): PR-5631

               *** POTENTIAL INCOMPATIBILITY ***

               The non-local function handler for the erl_eval can now
               be called with either two or three arguments. When
               called with three arguments, the first argument is the
               annotation for the node in the abstract format.

               All errors during evaluation will now be passed through
               erlang:raise/3. If the restricted shell is active and
               it does not let erlang:raise/3 through, evaluation
               errors will be printed in less clear way. See the
               documentation for restricted shell in shell.


  OTP-17953    Application(s): stdlib
               Related Id(s): PR-5621

               *** HIGHLIGHT ***

               Added filelib:ensure_path/1 that ensures that all
               directories for the given path exists (unlike
               filelib:ensure_dir/1, which will not create the last
               segment of the path).


  OTP-17969    Application(s): stdlib
               Related Id(s): PR-5588

               *** HIGHLIGHT ***

               The functions groups_from_list/2 and groups_from_list/3
               have been added to the maps module.


  OTP-17974    Application(s): stdlib
               Related Id(s): GH-5683

               gen_server has been refactored to throw more readable
               exceptions when a callback returns bad values in the
               Timeout field (timeout() | 'hibernate' |
               {'continue,_}), and also to verify that argument in the
               gen_server:enter_loop/3,4,5 API function.


  OTP-17977    Application(s): stdlib
               Related Id(s): GH-5606, PR-5766

               *** HIGHLIGHT ***

               The functions uniq/1 and uniq/2 for removing duplicates
               have been added to the lists module.


  OTP-17988    Application(s): compiler, kernel, stdlib, syntax_tools

               *** HIGHLIGHT ***

               Added support for selectable features as described in
               EEP-60. Features can be enabled/disabled during
               compilation with options (ordinary and +term) to erlc
               as well as with directives in the file. Similar options
               can be used to erl for enabling/disabling features
               allowed at runtime. The new maybe expression (EEP-49)
               is fully supported as the feature maybe_expr.


  OTP-17991    Application(s): stdlib

               *** POTENTIAL INCOMPATIBILITY ***

               The function filename:safe_relative_path/1, which has
               been deprecated since OTP 25, has been removed. Use
               filelib:safe_relative_path/2 instead.


  OTP-18011    Application(s): stdlib

               Two ancient well-known PRNG:s have been added to the
               rand module: mcg35 and lcg35. These are intended for
               applications that need really fast pseudo-random
               numbers and are not sensitive to lesser quality ones.

               Two internal functions for the exsp generator have also
               been exported so they can be used outside the rand
               plug-in framework to shave off some overhead.

               The internal splitmix64 generator has also been
               exported which can be useful for seeding other kinds of
               PRNG:s than its own.


 Full runtime dependencies of stdlib-4.0: compiler-5.0, crypto-4.5,
 erts-12.0, kernel-8.4, sasl-3.0


 ---------------------------------------------------------------------
 --- syntax_tools-3.0 ------------------------------------------------
 ---------------------------------------------------------------------

 --- Fixed Bugs and Malfunctions ---

  OTP-17894    Application(s): syntax_tools
               Related Id(s): PR-5509

               *** POTENTIAL INCOMPATIBILITY ***

               The erl_syntax_lib:analyze_attribute/1 function would
               return {Name, {Name, Value}} instead of {Name, Value}
               (which is the documented return value).


 --- Improvements and New Features ---

  OTP-17988    Application(s): compiler, kernel, stdlib, syntax_tools

               *** HIGHLIGHT ***

               Added support for selectable features as described in
               EEP-60. Features can be enabled/disabled during
               compilation with options (ordinary and +term) to erlc
               as well as with directives in the file. Similar options
               can be used to erl for enabling/disabling features
               allowed at runtime. The new maybe expression (EEP-49)
               is fully supported as the feature maybe_expr.


 Full runtime dependencies of syntax_tools-3.0: compiler-7.0,
 erts-9.0, kernel-5.0, stdlib-4.0


 ---------------------------------------------------------------------
 --- tools-3.5.3 -----------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17892    Application(s): erts, tools
               Related Id(s): PR-5591

               Removed the previously undocumented and unsupported
               emem tool.


 Full runtime dependencies of tools-3.5.3: compiler-5.0, erts-11.0,
 erts-9.1, kernel-5.4, runtime_tools-1.8.14, stdlib-3.4


 ---------------------------------------------------------------------
 --- wx-2.2 ----------------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17414    Application(s): common_test, crypto, erl_interface,
               erts, megaco, odbc, otp, snmp, wx
               Related Id(s): PR-4967

               Input for configure scripts adapted to autoconf 2.71.


  OTP-17950    Application(s): wx

               *** POTENTIAL INCOMPATIBILITY ***

               Added aux1Down and aux2Down fields to the wxMouseState
               record. Since one record have been changed a
               recompilation of user code might be required.


  OTP-18008    Application(s): wx
               Related Id(s): PR-5816

               Add mac specific menubar functions.


 Full runtime dependencies of wx-2.2: erts-12.0, kernel-8.0,
 stdlib-3.15


 ---------------------------------------------------------------------
 --- xmerl-1.3.29 ----------------------------------------------------
 ---------------------------------------------------------------------

 --- Improvements and New Features ---

  OTP-17935    Application(s): xmerl
               Related Id(s): PR-5590

               Fixed misspellings in both documentation, comments and
               code (internal data structures).


 Full runtime dependencies of xmerl-1.3.29: erts-6.0, kernel-3.0,
 stdlib-2.5


 ---------------------------------------------------------------------
 ---------------------------------------------------------------------
 ---------------------------------------------------------------------