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* lars/doc-cleanup/OTP-14475:
[edoc] Remove unused module otpsgml_layout.erl
Remove unused files from the documentation build
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* maint-19:
Updated OTP version
Update release notes
Update version numbers
Conflicts:
OTP_VERSION
erts/doc/src/notes.xml
erts/vsn.mk
lib/compiler/doc/src/notes.xml
lib/compiler/vsn.mk
otp_versions.table
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4c31fd0b9665 made the merging of match contexts stricter;
in fact, a little bit too strict.
Two match contexts with different number of slots would
be downgraded to the 'term' type. The correct way is to
keep the match context but set the number of slots to the
lowest number of slots of the two match contexts.
https://bugs.erlang.org/browse/ERL-490
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beam_validator could fail issue a diagnostic when a register
that was supposed to be a match context was not guaranteed to
be a match context.
The bug was in merging of types. Merging of a match context with
another term would result in a match context. That is wrong. Merging
should produce a more general type, not a narrower type. Also, the
valid slots in two match contexts should be combined with 'band', not
'bor'.
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* maint-20:
Updated OTP version
Prepare release
Accept non-binary options as socket-options
Bump version
Fix broken handling of default values in extensions for PER
compiler: Fix live regs update on allocate in validator
Take fail labels into account when determining liveness in block ops
Check for overflow when appending binaries, and error out with system_limit
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'john/compiler/fail-labels-in-blocks-otp-19/ERIERL-48/OTP-14522' into maint-20
* john/compiler/fail-labels-in-blocks-otp-19/ERIERL-48/OTP-14522:
compiler: Fix live regs update on allocate in validator
Take fail labels into account when determining liveness in block ops
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'john/compiler/fail-labels-in-blocks-otp-18/ERIERL-48/OTP-14522' into maint
* john/compiler/fail-labels-in-blocks-otp-18/ERIERL-48/OTP-14522:
compiler: Fix live regs update on allocate in validator
Take fail labels into account when determining liveness in block ops
Conflicts:
lib/compiler/src/beam_utils.erl
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The state without pruned registers was passed on to test_heap
causing the validator to belive registers that aren't live
actually are live.
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The state without pruned registers was passed on to test_heap
causing the validator to belive registers that aren't live
actually are live.
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The sys_core_fold pass would do an unsafe "optimization" when an
apply operation did not have a variable in the function position
as in the following example:
> cat test1.core
module 'test1' ['test1'/2]
attributes []
'i'/1 =
fun (_f) -> _f
'test1'/2 =
fun (_f, _x) ->
apply apply 'i'/1 (_f) (_x)
end
> erlc test1.core
no_file: Warning: invalid function call
Reported-by: Mikael Pettersson
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* bjorn/compiler/fix-invalid-orddict:
v3_kernel: Keep orddicts sorted
sys_core_fold: Ensure that orddict keys are unique
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* bjorn/cuddle-with-tests:
Eliminate warnings for unused variables
Remove unused functions in test emulator test suites
process_SUITE: Don't leave processes running
trace_port_SUITE: Don't leave processes running
tracer_SUITE: Don't leave processes running
trace_nif_SUITE: Don't leave processes running
trace_bif_SUITE: Don't leave processes running
trace_SUITE: Don't leave processes running
message_queue_data_SUITE: Don't leave processes running
Add informational test case z_SUITE:leaked_processes/1
busy_port_SUITE: Ensure that all created procesesses are killed
busy_port_SUITE: Eliminate warnings for unused variables
busy_port_SUITE: Eliminate 'export_all'
after_SUITE: Don't leave a process running
beam_type_SUITE: Add a test case for an already fixed bug
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All keys in an orddict must be unique. sys_core_fold:sub_sub_scope/1
broke that rule. It was probably harmless, but it is better to
avoid such rule violations.
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* hasse/unicode_atoms/OTP-14285:
compiler: Handle (bad) Unicode parse transform module names
kernel: Improve handling of Unicode filenames
stdlib: Handle Unicode atoms in ms_transform
stdlib: Improve Unicode handling of the Erlang parser
stdlib: Handle unknown compiler options with Unicode
stdlib: Handle Unicode macro names
stdlib: Correct Unicode handling in escript
dialyzer: Improve handling of Unicode
parsetools: Improve handling of Unicode atoms
stdlib: Handle Unicode atoms when formatting stacktraces
stdlib: Add more checks of module names to the linter
stdlib: Handle Unicode atoms better in io_lib_format
stdlib: Handle Unicode atoms in c.erl
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https://bugs.erlang.org/browse/ERL-433
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As part of sys_core_fold, variables involved in bit syntax
matching would be annotated when it would be safe for a later
pass to do the delayed sub-binary creation optimization.
An implicit assumption regarding the annotation was that the
code must not be further optimized. That assumption was broken
in 05130e48555891, which introduced a fixpoint iteration
(applying the optimizations until there were no more changes).
That means that a variable could be annotated as safe for
reusing the match context in one iteration, but a later iteration
could rewrite the code in a way that would make the optimization
unsafe.
One way to fix this would be to clear all reuse_for_context
annotations before each iteration. But that would be wasteful.
Instead I chose to fix the problem by moving out the annotation
code to a separate pass (sys_core_bsm) that is run later after
all major optimizations of Core Erlang has been done.
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This reverts commit eaf8ca41dfa4850437ad270d3897399c9358ced0.
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compile:forms/1,2 is documented to return:
{ok,ModuleName,BinaryOrCode}
However, if one of the options 'from_core', 'from_asm', or
'from_beam' is given, ModuleName will be returned as [].
A worse problem is that is that if one those options are
combined with the 'native' option, compilation will crash.
Correct compile:forms/1,2 to pick up the module name from
the forms provided (either Core Erlang, Beam assembly code,
or a Beam file).
Reported here: https://bugs.erlang.org/browse/ERL-417
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Make it clear that is_tagged_tuple/4 was added in OTP 20 (not R17).
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* bjorn/cuddle-with-tests:
code_SUITE: Remove unused functions
Eliminate warning for variable 'Config' being unused
compile_SUITE: Don't create a directory called 'core'
Don't crash in end_per_testcase/2 in code_SUITE:on_load_embedded/1
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A core dump can't be created with the name 'core' if there is
a directory named 'core'.
Rename the test case from core/1 to core_pp/1 so that the directory
name can be the same as the test case name. It also makes sense
to use a less generic name for the test case.
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Warn for potentially unsafe use of get_stacktrace/0
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erlang:get_stacktrace/0 returns the stacktrace for the latest
exception. The problem is that the stacktrace is kept until the next
exception occurs. If the last exception was a 'function_clause' or a
'badarg', the arguments for the call are also kept forever. The
arguments can be terms of any size (potentially huge).
In a future release, we would like to only allow
erlang:get_stacktrace/0 from within a 'try' expression. That would
make it possible to clear the stacktrace when the 'try' expression is
exited.
The 'catch' expression has no natural end where the stacktrace could
be cleared. The stacktrace could be cleared at the end of the function
that the 'catch' occurs in, but that would cause problems in the
following scenario (from real life, but simplified):
try
...
catch _:_ ->
io:format(...),
io:format("~p\n", [erlang:get_stacktrace()])
end.
%% In io.erl.
format(Fmt, Args) ->
Res = case ... of
SomePattern ->
catch...
...;
SomeOtherPattern ->
%% Output the formatted string here
...
end,
clear_stacktrace(), %% Inserted by compiler.
Res.
The call to io:format() would always clear the stacktrace before
it could be retrieved.
That problem could be solved by tightning the scope in which the
stacktrace is kept, but the rules for how long erlang:get_stacktrace/0
would work would become complicated.
Therefore, the solution we suggest for a future major release of
OTP is that erlang:get_stacktrace/0 will return [] if it is called
outside the 'catch' part of a 'try' expression.
To help users prepare, introduce a warning when it is likely that
erlang:get_stacktrace/0 will always return an empty list, for example
in this code:
catch error(foo),
Stk = erlang:get_stacktrace()
or in this code:
try Expr
catch _:_ -> ok end,
Stk = erlang:get_stacktrace()
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* bjorn/compiler/cover:
compiler.cover: Remove deleted module sys_pre_expand
Cover the first clause of v3_core:bin_expand_string/4
compile_SUITE: Test the r16, r17, r18, r19 options
erl_bifs: Remove pure BIFs serving no useful purpose
erl_bifs: Remove erlang:hash/2 from list of pure functions
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Correct description of nowarn_obsolete_guard
By default, warnings for obsolete guards are turned on. Correct the description to make that clear.
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The uncovered clause was introduced in bee8f839296e.
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Also test other options that turns off certain optimizations or
instruction sets.
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Functions that can are known be pure can be evaluated at
compile-time if the arguments are literals and if the result is
expressible as a literal.
list_to_ref/1 and list_to_port/1 returns terms that cannot be
expressed as literals, so the optimization is not possible.
The argument for port_to_list/1 is never a literal, so there is
no way to evaluate it at compile-time. Therefore, marking those
functions as pure serves no useful purpose.
Note: list_to_pid/1 *is* marked as pure, but only so that we can test
the code in sys_core_fold that rejects pure functions that evaluate to
at term that is not possible to express as a literal. It is sufficient
to have one pure function of that kind.
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erlang:hash/2 was removed in c5d9b970fb5b3a71.
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Add a test for utf8 function names
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The test found a bug in v3_kernel_pp which was not
taking into account utf8 atoms. The bug has also
been fixed.
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Make 'slim' slim again
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Remove unused variable warning in compile_SUITE
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This reverts commit dc57404252c47520f352834ad9be45ad684f96c9.
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