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If the number of warnings is huge the '--'/2 operator is slow.
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Also modified erl_bif_types:infinity_bsl() when called with zero as
first argument. As of writing this, erlang:'bsl'/2 is modified on the
master branch to never fail if called with a huge second argument.
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See also https://bugs.erlang.org/browse/ERL-551.
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The Maps implementation handles ?unit in more cases.
Exactly when t_is_none_or_unit() is to be called is not clear to me.
The added cases are about a map type being ?unit, but the key or the
value of an association can also be ?unit, but that is not always
checked.
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As of commit 12b379 many of the reasons displayed after
"Analysis failed with error:"
erroneously include a call stack. The bug is now corrected.
The bug was pointed out in
http://erlang.org/pipermail/erlang-questions/2017-October/093838.html.
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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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~tw and new string functions are new since OTP-20 (stdlib-3.4)
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* hasse/dialyzer/map_fixes/OTP-14572:
dialyzer: Adjust a test case
dialyzer: Modify handling of singleton map key types
Dialyzer: Rewrite one map type invariant
Dialyzer: Rewrite some of the docs of map types
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The implementation of OTP-14218 (commit 6d3b38a) has a weakness: only
a very limited part of the type form is checked. This is now fixed:
types not used by specs are checked equally well as types used by
specs.
The new function erl_types:t_from_form_check_remote() checks usage of
remote types. It does not expand used local types, and has (almost) no
limits on depth and size.
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This commit removes the call to ets:safe_fixtable/2 introduced in
commit 9458495. ETS memory can now be reclaimed while merging PLTs.
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Huge maps are truncated differently by the pretty printer. The reason
is that erl_types:is_singleton_type/1 no longer recognizes complex
singleton types, which results in a less precise representation of map
types.
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The test case loop.erl shows that there is a problem with certain
singleton key types. Here the internal representation toggles between
#{a | b => ...} and #{a => ..., b => ...}
The choice is to turn #{a | b => ...} into #{a => ..., b => ...} early
(t_from_form()). The aim is to keep as much info as possible (in
pairs). However, including complex singleton keys (tuples, maps) in
this scheme is potentially too costly, and a bit complicated. So one
more choice is made: let atoms and number (and nothing else) be
singleton types, and let complex keys go into the default key.
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A missing call to ets:safe_fixtable/2 meant that information
was sometimes lost when merging PLT:s.
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Memory consumption is marginally reduced.
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Instead of two records, #plt{} with dict:s and #mini_plt{} with ETS
tables, one record is used for representing PLT:s in RAM.
The #mini_plt{} is the one now used throughout analyses, but it is
called #plt{}.
When writing the PLT to file, another record is used, #file_plt{} (as
before). When creating #file_plt{}, the #plt{} is deleted (it cannot
be used for further analyses).
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Avoid some ETS-lookups. Marginal speed-ups.
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The arguments of calls to a debug function are no longer evaluated.
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In typesig: do not look up the module's types unless it is necessary.
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This reverts commit eaf8ca41dfa4850437ad270d3897399c9358ced0.
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This reverts commit dc57404252c47520f352834ad9be45ad684f96c9.
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* maint:
Updated OTP version
Prepare release
inets: Add missing release note
dialyzer: Fix a bug regarding unknown types
erl_mseg.c: don't use invalid indices in - > cache_powered_node[]
Fix release note for OTP-14290
Conflicts:
OTP_VERSION
erts/emulator/sys/common/erl_mseg.c
erts/vsn.mk
lib/dialyzer/src/dialyzer_analysis_callgraph.erl
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Due to a bug in Dialyzer, unknown types have been introduced.
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Since commit 12b3790 Dialyzer has not reported unknown types.
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Introduce new "Dbgi" chunk
OTP-14369
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The new Dbgi chunk returns data in the following format:
{debug_info_v1, Backend, Data}
This allows compilers to store the debug info in different
formats. In order to retrieve a particular format, for
instance, Erlang Abstract Format, one may invoke:
Backend:debug_info(erlang_v1, Module, Data, Opts)
Besides introducing the chunk above, this commit also:
* Changes beam_lib:chunk(Beam, [:abstract_code]) to
read from the new Dbgi chunk while keeping backwards
compatibility with old .beams
* Adds the {debug_info, {Backend, Data}} option to
compile:file/2 and friends that are stored in the
Dbgi chunk. This allows the debug info encryption
mechanism to work across compilers
* Improves dialyzer to work directly on Core Erlang,
allowing languages that do not have the Erlang
Abstract Format to be dialyzer as long as they emit
the new chunk and their backend implementation is
available
Backwards compatibility is kept across the board except
for those calling beam_lib:chunk(Beam, ["Abst"]), as the
old chunk is no longer available. Note however the "Abst"
chunk has always been optional.
Future OTP versions may remove parsing the "Abst" chunk
altogether from beam_lib once Erlang 19 and earlier is no
longer supported.
The current Dialyzer implementation still supports earlier
.beam files and such may also be removed in future versions.
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* zandra/stdlib/optional-callbacks/OTP-13801:
wx: make wx_object callbacks optional
stdlib: Make gen_fsm callbacks optional
stdlib: Make gen_event callbacks optional
stdlib: Make gen_server callbacks optional
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* bjorn/dialyzer/add-typer/OTP-14336:
Add smoke test for TypER
Add back TypEr to the main OTP repository
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It turned out that the dependencies between Dialyzer
and TypEr makes it impractical to have TypEr in a
separate repository.
Add it back to the OTP repository, but put the Erlang
module 'typer' in the dialyzer application.
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The same checks are also performed by the Dialyzer.
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* maint:
Updated OTP version
Prepare release
Conflicts:
OTP_VERSION
lib/typer/doc/src/notes.xml
lib/typer/vsn.mk
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