Inital Release: OTP 27.0
Git Tag: OTP-27.0
Date: 2024-05-20
Trouble Report Id: OTP-16607, OTP-18568, OTP-18577, OTP-18589,
OTP-18590, OTP-18594, OTP-18606, OTP-18608,
OTP-18609, OTP-18622, OTP-18639, OTP-18641,
OTP-18642, OTP-18648, OTP-18658, OTP-18665,
OTP-18667, OTP-18668, OTP-18671, OTP-18673,
OTP-18680, OTP-18682, OTP-18684, OTP-18699,
OTP-18703, OTP-18709, OTP-18713, OTP-18714,
OTP-18715, OTP-18716, OTP-18717, OTP-18727,
OTP-18741, OTP-18742, OTP-18743, OTP-18744,
OTP-18750, OTP-18756, OTP-18761, OTP-18766,
OTP-18774, OTP-18778, OTP-18779, OTP-18781,
OTP-18783, OTP-18784, OTP-18785, OTP-18786,
OTP-18787, OTP-18788, OTP-18789, OTP-18793,
OTP-18794, OTP-18795, OTP-18796, OTP-18801,
OTP-18804, OTP-18805, OTP-18806, OTP-18807,
OTP-18808, OTP-18809, OTP-18813, OTP-18816,
OTP-18819, OTP-18820, OTP-18825, OTP-18831,
OTP-18834, OTP-18835, OTP-18845, OTP-18846,
OTP-18847, OTP-18848, OTP-18849, OTP-18852,
OTP-18856, OTP-18859, OTP-18860, OTP-18865,
OTP-18870, OTP-18874, OTP-18875, OTP-18876,
OTP-18878, OTP-18879, OTP-18881, OTP-18884,
OTP-18887, OTP-18892, OTP-18894, OTP-18898,
OTP-18904, OTP-18908, OTP-18912, OTP-18913,
OTP-18914, OTP-18916, OTP-18918, OTP-18920,
OTP-18922, OTP-18923, OTP-18927, OTP-18928,
OTP-18929, OTP-18930, OTP-18934, OTP-18938,
OTP-18941, OTP-18942, OTP-18943, OTP-18944,
OTP-18945, OTP-18946, OTP-18947, OTP-18950,
OTP-18951, OTP-18954, OTP-18955, OTP-18959,
OTP-18961, OTP-18963, OTP-18965, OTP-18966,
OTP-18967, OTP-18968, OTP-18969, OTP-18972,
OTP-18973, OTP-18975, OTP-18976, OTP-18977,
OTP-18978, OTP-18980, OTP-18981, OTP-18984,
OTP-18987, OTP-18989, OTP-18992, OTP-18993,
OTP-18994, OTP-18995, OTP-18998, OTP-19001,
OTP-19004, OTP-19005, OTP-19010, OTP-19016,
OTP-19017, OTP-19018, OTP-19020, OTP-19022,
OTP-19025, OTP-19026, OTP-19027, OTP-19029,
OTP-19030, OTP-19033, OTP-19042, OTP-19052,
OTP-19053, OTP-19054, OTP-19057, OTP-19063,
OTP-19073, OTP-19074, OTP-19075, OTP-19077,
OTP-19079, OTP-19080, OTP-19081, OTP-19082,
OTP-19086, OTP-19087, OTP-19088, OTP-19089,
OTP-19090
Seq num: #6724, BL-312, BL-322, ERIERL-43, ERIERL-964,
ERIERL-967, ERIERL-985, GH-4992, GH-6152,
GH-6692, GH-6979, GH-6985, GH-7266, GH-7295,
GH-7397, GH-7432, GH-7438, GH-7483, GH-7493,
GH-7494, GH-7539, GH-7617, GH-7706, GH-7718,
GH-7972, GH-8058, GH-8061, GH-8066, GH-8159,
GH-8166, GH-8244, GH-8360, GH-8364, GH-8365,
GH-8366, GH-8452, OTP-16448, OTP-16608,
OTP-16875, OTP-17734, OTP-18746, OTP-18750,
OTP-18835, PR-6510, PR-6639, PR-6658,
PR-6791, PR-6985, PR-7110, PR-7125, PR-7174,
PR-7183, PR-7220, PR-7232, PR-7236, PR-7243,
PR-7267, PR-7274, PR-7299, PR-7302, PR-7313,
PR-7316, PR-7348, PR-7380, PR-7383, PR-7388,
PR-7398, PR-7419, PR-7428, PR-7441, PR-7443,
PR-7447, PR-7451, PR-7465, PR-7470, PR-7474,
PR-7475, PR-7481, PR-7491, PR-7496, PR-7528,
PR-7534, PR-7535, PR-7538, PR-7556, PR-7585,
PR-7590, PR-7592, PR-7607, PR-7628, PR-7639,
PR-7649, PR-7651, PR-7675, PR-7678, PR-7684,
PR-7697, PR-7699, PR-7700, PR-7701, PR-7702,
PR-7703, PR-7711, PR-7720, PR-7726, PR-7728,
PR-7732, PR-7738, PR-7739, PR-7740, PR-7745,
PR-7779, PR-7781, PR-7782, PR-7790, PR-7809,
PR-7816, PR-7824, PR-7844, PR-7845, PR-7846,
PR-7847, PR-7856, PR-7857, PR-7869, PR-7879,
PR-7891, PR-7898, PR-7917, PR-7918, PR-7936,
PR-7942, PR-7952, PR-7957, PR-7960, PR-7963,
PR-7973, PR-7977, PR-7981, PR-7993, PR-8003,
PR-8004, PR-8006, PR-8026, PR-8029, PR-8035,
PR-8042, PR-8048, PR-8056, PR-8063, PR-8067,
PR-8069, PR-8076, PR-8086, PR-8090, PR-8091,
PR-8092, PR-8093, PR-8095, PR-8103, PR-8111,
PR-8112, PR-8155, PR-8156, PR-8164, PR-8168,
PR-8177, PR-8182, PR-8205, PR-8230, PR-8233,
PR-8241, PR-8249, PR-8250, PR-8255, PR-8256,
PR-8258, PR-8288, PR-8308, PR-8324, PR-8345,
PR-8363, PR-8375, PR-8382, PR-8389, PR-8396,
PR-8399
System: OTP
Release: 27
Application: asn1-5.3, common_test-1.27, compiler-8.5,
crypto-5.5, debugger-5.4, dialyzer-5.2,
diameter-2.4, edoc-1.3, eldap-1.2.13,
erl_interface-5.5.2, erts-15.0, et-1.7.1,
eunit-2.9.1, ftp-1.2.2, inets-9.2,
jinterface-1.14.1, kernel-10.0, megaco-4.6,
mnesia-4.23.2, observer-2.16, odbc-2.14.3,
os_mon-2.10, parsetools-2.6, public_key-1.16,
reltool-1.0.1, runtime_tools-2.1, sasl-4.2.2,
snmp-5.16, ssh-5.2, ssl-11.2, stdlib-6.0,
syntax_tools-3.2, tftp-1.2, tools-4.0,
wx-2.4.2, xmerl-2.0
Predecessor: OTP
Check out the git tag OTP-27.0, and build a full OTP system including
documentation.
# HIGHLIGHTS
- The `ssl` client can negotiate and handle certificate status request (OCSP
stapling support on the client side).
Thanks to voltone for interop testing and related discussions.
Own Id: OTP-18606
Application(s): public_key, ssl
Related Id(s): OTP-16448, OTP-16875
- The functions `is_equal/2`, `map/2`, and `filtermap/2` have been added to the
modules `sets`, `ordsets`, and `gb_sets`.
Own Id: OTP-18622
Application(s): stdlib
Related Id(s): PR-7183, PR-7232
- The compiler now emits nicer error message for function head mismatches. For
example, given:
a() -> ok;
a(_) -> error.
Erlang/OTP 26 and earlier would emit a diagnostic similar to:
t.erl:6:1: head mismatch
% 6| a(_) -> error.
% | ^
while in Erlang/OTP 27 the diagnostic is similar to:
t.erl:6:1: head mismatch: function a with arities 0 and 1 is regarded as two distinct functions. Is the number of arguments incorrect or is the semicolon in a/0 unwanted?
% 6| a(_) -> error.
% | ^
Own Id: OTP-18648
Application(s): compiler, stdlib
Related Id(s): PR-7383
- The compiler will now merge consecutive updates of the same record.
As an example, the body of the following function will be combined into a
single tuple creation instruction:
-record(r, {a,b,c,d}).
update(Value) ->
R0 = #r{},
R1 = R0#r{a=Value},
R2 = R1#r{b=2},
R2#r{c=3}.
Own Id: OTP-18680
Application(s): compiler
Related Id(s): ERIERL-967, PR-7491, PR-8086
- As announced in OTP 26.1, `0.0` is no longer considered equivalent to `-0.0`
when using the term equivalence operators (`=:=` and `=/=`).
The arithmetic equality operators (`==` and `/=`) and all relative comparison
operations still consider `0.0` equal to `-0.0`.
Own Id: OTP-18717
Application(s): otp
Related Id(s): PR-7728
*** POTENTIAL INCOMPATIBILITY ***
- The `erl` command now supports the `-S` flag, which is similar to the `-run`
flag, except that it will pass all arguments up to end of the command line to
the called function. (The `-run` flag will not pass arguments beginning with a
hyphen.) Another difference is that `-S` will always call a function with one
argument, passing an empty list if no arguments were given.
Own Id: OTP-18744
Application(s): erts
Related Id(s): PR-7470
- Triple-Quoted Strings has been implemented as per EEP 64. See String in the
Reference Manual.
Example:
1> """
a
b
c
""".
"a\nb\nc"
Adjacent string literals without intervening white space is now a syntax
error, to avoid possible confusion with triple-quoted strings. For example:
1> "abc""xyz".
"xyz".
* 1:6: adjacent string literals without intervening white space
Own Id: OTP-18750
Application(s): stdlib, tools
Related Id(s): PR-7313, PR-7451, OTP-18746
*** POTENTIAL INCOMPATIBILITY ***
- There is a new tool `tprof`, which combines the functionality of `eprof`
and `cprof` under one interface and adds heap profiling. It also has
functionality to help with profiling process hierarchies.
_Example_:
1> tprof:profile(lists, seq, [1, 16], #{type => call_memory}).
****** Process <0.92.0> -- 100.00% of total ***
FUNCTION CALLS WORDS PER CALL [ %]
lists:seq_loop/3 5 32 6.40 [100.00]
32 [ 100.0]
ok
Own Id: OTP-18756
Application(s): tools
Related Id(s): PR-6639
- Several new functions that accept funs have been added to module `timer`.
Functions `apply_after/2`, `apply_interval/2`, and `apply_repeatedly/2` accept
a nullary fun as the second argument, while functions `apply_after/3`,
`apply_interval/3`, and `apply_repeatedly/3` accept an n-ary fun as the second
and a list of n arguments for the fun as the third argument.
Own Id: OTP-18808
Application(s): stdlib
Related Id(s): PR-7649
- Sigils on string literals have been implemented as per EEP 66, that is:
binary and string sigils in verbatim and escape characters variants, as well
as a default (vanilla) Sigil. All for ordinary strings and for triple-quoted
strings (EEP 64). See Sigils in the Reference Manual.
Examples:
1> ~"Björn".
<<"Björn"/utf8>>
2> ~b"Björn".
<<"Björn"/utf8>>
3> ~S"\s*(\w+)".
"\\s*(\\w+)"
4> ~B"\s*(\w+)".
<<"\\s*(\\w+)">>
Own Id: OTP-18825
Application(s): stdlib
Related Id(s): PR-7684, OTP-18750
- Native coverage support has been implemented in the JIT. It will automatically
be used by the `cover` tool to reduce the execution overhead when running
cover-compiled code.
There are also new APIs to support native coverage without using the `cover`
tool.
To instrument code for native coverage it must be compiled with the
`line_coverage` option.
To enable native coverage in the runtime system, start it like so:
$ erl +JPcover true
There are also the following new functions for supporting native coverage:
- code:coverage_support/0
- code:get_coverage/2
- code:reset_coverage/1
- code:get_coverage_mode/0
- code:get_coverage_mode/1
- code:set_coverage_mode/1
Own Id: OTP-18856
Application(s): compiler, erts, kernel, tools
Related Id(s): PR-7856
- EEP-59 - Documentation Attributes has been implemented.
Documentation attributes can be used to document functions, types, callbacks,
and modules. The keyword `-moduledoc "Documentation here".` is used to
document modules, while `-doc "Documentation here".` can be used on top of
functions, types, and callbacks to document them, respectively.
- Types, callbacks, and function documentation can be set to `hidden` either
via `-doc false` or `-doc hidden`. When documentation attributes mark a type
as hidden, they will not be part of the documentation.
- The documentation from `moduledoc` and `doc` gets added by default to the
binary beam file, following the format of EEP-48.
- Using the compiler flag `warn_missing_doc` will raise a warning when `-doc`
attributes are missing in exported functions, types, and callbacks.
- Using the compiler flag `warn_missing_spec_documented` will raise a warning
when spec attributes are missing in documented functions, types, and
callbacks.
- `moduledoc`s and `doc`s may refer to external files to be embedded, such as
`-doc {file, "README.md"}.`, which refers to the file `README.md` found in
the current working directory.
- The compiler warns about exported functions whose specs refer to hidden
types. Thus, there will be warnings when a hidden type (meaning, the type is
not part of the documentation) gets used in an exported function.
Own Id: OTP-18916
Application(s): compiler, stdlib
Related Id(s): PR-7936
- New `ets` functions ets:first_lookup/1, ets:next_lookup/2,
ets:prev_lookup/2 and ets:last_lookup/1. Example: ets:next_lookup/1 is
equivalent to ets:next/2 followed by ets:lookup/2 with the next key. The
new combined functions are more efficient and with guaranteed atomicity.
Own Id: OTP-18923
Application(s): stdlib
Related Id(s): PR-6791
- The `maybe` expression is now enabled by default.
To use `maybe` as an atom, it needs to be single-quoted. Alternatively, the
`maybe` expression can be disabled by disabling the `maybe_expr` feature. That
can be done by placing the following the line at the beginning of an Erlang
source file:
-feature(maybe_expr, disable).
Another way to disable the `maybe_expr` feature is by passing the
`-disable-feature` option to `erlc`:
erlc -disable-feature maybe_expr some_file.erl
Own Id: OTP-18944
Application(s): otp, stdlib
Related Id(s): PR-8067
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Application(s): asn1, common_test, compiler, crypto, debugger, dialyzer,
diameter, edoc, eldap, erl_interface, erts, et, eunit, ftp, inets, jinterface,
kernel, megaco, mnesia, observer, odbc, os_mon, parsetools, public_key,
reltool, runtime_tools, sasl, snmp, ssh, ssl, stdlib, syntax_tools, tftp,
tools, wx, xmerl
Related Id(s): PR-8026
- Safe destructive update of tuples has been implemented in the compiler and
runtime system. This allows the VM to update tuples in-place when it is safe
to do so, thus improving performance by doing less copying but also by
producing less garbage.
Example:
-record(rec, {a,b,c}).
update(#rec{a=needs_update,b=N}=R0) ->
R = R0#rec{a=up_to_date},
if
N < 0 ->
R#rec{c=negative};
N == 0 ->
R#rec{c=zero};
N > 0 ->
R#rec{c=positive}
end.
The record updates in each of the three clauses of the `if` can safely be done
in-place, because variable `R` is not used again.
Own Id: OTP-18972
Application(s): compiler, erts
Related Id(s): PR-8090
- There is a new module `trace` in Kernel providing the same trace
functionality as erlang:trace/3 and erlang:trace_pattern/3, but with the
addition of **dynamic isolated trace sessions**.
Own Id: OTP-18980
Application(s): erts, kernel
- The `jer` (JSON Encoding Rules) for ASN.1 now use the new `json` module for
encoding and decoding JSON. Thus, there is no longer any need for an external
JSON library.
Own Id: OTP-19018
Application(s): asn1
Related Id(s): PR-8241
- There is a new module `json` for encoding and decoding JSON.
Both encoding and decoding can be customized. Decoding can be done in a
SAX-like fashion and handle multiple documents and streams of data.
Own Id: OTP-19020
Application(s): stdlib
Related Id(s): PR-8111
- For security reasons, the CBC ciphers are now longer included in the list of
default ciphers for TLS-1.2.
Own Id: OTP-19025
Application(s): ssl
Related Id(s): PR-8250
*** POTENTIAL INCOMPATIBILITY ***
# POTENTIAL INCOMPATIBILITIES
- The `pid` field returned from `erlang:fun_info/1,2` is now always the pid for
the `init` process of the local node, not the pid for the actual process that
created the fun.
Own Id: OTP-18594
Application(s): erts
Related Id(s): PR-7274
- By default, escripts will now be compiled instead of interpreted. That means
that the `compiler` application must be installed.
Own Id: OTP-18639
Application(s): erts
Related Id(s): PR-7348
- Introduced a default value for httpd_server name configuration to improve ease
of use.
Own Id: OTP-18641
Application(s): inets
Related Id(s): PR-7316
- As announced in OTP 26.1, `0.0` is no longer considered equivalent to `-0.0`
when using the term equivalence operators (`=:=` and `=/=`).
The arithmetic equality operators (`==` and `/=`) and all relative comparison
operations still consider `0.0` equal to `-0.0`.
Own Id: OTP-18717
Application(s): otp
Related Id(s): PR-7728
*** HIGHLIGHT ***
- Triple-Quoted Strings has been implemented as per EEP 64. See String in the
Reference Manual.
Example:
1> """
a
b
c
""".
"a\nb\nc"
Adjacent string literals without intervening white space is now a syntax
error, to avoid possible confusion with triple-quoted strings. For example:
1> "abc""xyz".
"xyz".
* 1:6: adjacent string literals without intervening white space
Own Id: OTP-18750
Application(s): stdlib, tools
Related Id(s): PR-7313, PR-7451, OTP-18746
*** HIGHLIGHT ***
- The documentation for the preprocessor now mentions that `defined(Name)` can
be called in the condition for an `-if` or `-elif` directive to test whether
`Name` is the name of a defined macro. (This feature was implemented in OTP
21.)
If a function call in an `-if` or `-elif` with a name that is not the name of
a guard BIF, there would not be a compilation error, but would instead cause
the lines following the directive to be skipped. This has now been changed to
be a compilation error.
Own Id: OTP-18784
Application(s): compiler, otp, stdlib
Related Id(s): GH-7706, PR-7726
- The existing experimental support for archive files will be changed in a
future release. The support for having an archive in an escript will remain,
but the support for using archives in a release will either become more
limited or completely removed.
As of Erlang/OTP 27, the function code:lib_dir/2, the `-code_path_choice`
flag, and using `erl_prim_loader` for reading members of an archive are
deprecated.
To remain compatible with future version of Erlang/OTP `escript` scripts that
need to retrieve data files from its archive should use escript:extract/2
instead of `erl_prim_loader` and code:lib_dir/2.
Own Id: OTP-18966
Application(s): kernel, otp
Related Id(s): PR-8091
- The order in which the compiler looks up options has changed.
When there is a conflict in the compiler options given in the `-compile()`
attribute and options given to the compiler, the options given in the
`-compile()` attribute overrides the option given to the compiler, which in
turn overrides options given in the `ERL_COMPILER_OPTIONS` environment
variable.
Example:
If `some_module.erl` has the following attribute:
-compile([nowarn_missing_spec]).
and the compiler is invoked like so:
% erlc +warn_missing_spec some_module.erl
no warnings will be issued for functions that do not have any specs.
Own Id: OTP-18968
Application(s): compiler
Related Id(s): GH-6979, PR-8093
- The existing function ssl:key_exporter_materials/4 is now documented and
supported.
Own Id: OTP-19016
Application(s): crypto, public_key
Related Id(s): PR-8233
- The implementations of http_uri:encode/1 and http_uri:decode/1 are now
replaced with their equivalent, but bug free versions from module
`uri_string`, namely uri_string:quote/1 and uri_string:unquote/1.
Own Id: OTP-19022
Application(s): inets
- For security reasons, the CBC ciphers are now longer included in the list of
default ciphers for TLS-1.2.
Own Id: OTP-19025
Application(s): ssl
Related Id(s): PR-8250
*** HIGHLIGHT ***
- The error handling the `simple_one_for_one` supervisor has been enhanced. A
transient child returning `ignore` will no longer cause a crash.
Also, automatic shutdown has been disabled because it does not make sense for
this supervisor type. That is was allowed is considered a bug. Therefore, we
don't consider this an incompatible change.
Own Id: OTP-19029
Application(s): stdlib
Related Id(s): PR-8230
- Due to another attack on PKCS #1 v1.5 padding, known as the Marvin attack,
about which we were alerted by Hubert Kario from Red Hat. You can find more
details about the attack at https://people.redhat.com/~hkario/marvin/
Functions that may be vulnerable are now deprecated.
Note that you might mitigate the problem by using appropriate versions of
OpenSSL together with our software, but we recommend not using them at all.
Also avoid using TLS versions prior to TLS-1.2 (not supported by default) and
do not enable RSA-key exchange cipher suites (not supported by default).
Own Id: OTP-19075
Application(s): crypto, public_key
- Some default values in Xmerl has been changed to avoid XML External Entity
(XXE) vulnerabilities if you're parsing untrusted XML.
xmerl_scan: the default value for allow_entities has changed to false.
xmerl_sax_parser: the default value for external_entities has changed to none.
Own Id: OTP-19079
Application(s): xmerl
Related Id(s): GH-7539
# OTP-27.0
## Fixed Bugs and Malfunctions
- As announced in OTP 26.1, `0.0` is no longer considered equivalent to `-0.0`
when using the term equivalence operators (`=:=` and `=/=`).
The arithmetic equality operators (`==` and `/=`) and all relative comparison
operations still consider `0.0` equal to `-0.0`.
Own Id: OTP-18717
Related Id(s): PR-7728
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
- The documentation for the preprocessor now mentions that `defined(Name)` can
be called in the condition for an `-if` or `-elif` directive to test whether
`Name` is the name of a defined macro. (This feature was implemented in OTP
21.)
If a function call in an `-if` or `-elif` with a name that is not the name of
a guard BIF, there would not be a compilation error, but would instead cause
the lines following the directive to be skipped. This has now been changed to
be a compilation error.
Own Id: OTP-18784
Related Id(s): GH-7706, PR-7726
*** POTENTIAL INCOMPATIBILITY ***
## Improvements and New Features
- `configure` scripts of the OTP build system are now generated using Autoconf
2.72.
Own Id: OTP-18943
- The `maybe` expression is now enabled by default.
To use `maybe` as an atom, it needs to be single-quoted. Alternatively, the
`maybe` expression can be disabled by disabling the `maybe_expr` feature. That
can be done by placing the following the line at the beginning of an Erlang
source file:
-feature(maybe_expr, disable).
Another way to disable the `maybe_expr` feature is by passing the
`-disable-feature` option to `erlc`:
erlc -disable-feature maybe_expr some_file.erl
Own Id: OTP-18944
Related Id(s): PR-8067
*** HIGHLIGHT ***
- By default `configure` scripts used when building OTP will now try to enable
support for timestamps that will work after mid-January 2038. This has
typically only been an issue on 32-bit platforms.
If `configure` cannot figure out how to enable such timestamps, it will abort
with an error message. If you want to build the system anyway, knowing that
the system will not function properly after mid-January 2038, you can pass the
`--disable-year2038` option to `configure`, which will enable `configure` to
continue without support for timestamps after mid-January 2038.
Own Id: OTP-18965
Related Id(s): PR-8095
- The existing experimental support for archive files will be changed in a
future release. The support for having an archive in an escript will remain,
but the support for using archives in a release will either become more
limited or completely removed.
As of Erlang/OTP 27, the function code:lib_dir/2, the `-code_path_choice`
flag, and using `erl_prim_loader` for reading members of an archive are
deprecated.
To remain compatible with future version of Erlang/OTP `escript` scripts that
need to retrieve data files from its archive should use escript:extract/2
instead of `erl_prim_loader` and code:lib_dir/2.
Own Id: OTP-18966
Related Id(s): PR-8091
*** POTENTIAL INCOMPATIBILITY ***
- The restriction for the expression that gives a default value for a record
field is now documented.
Own Id: OTP-18995
Related Id(s): GH-8166, PR-8177
# asn1-5.3
## Fixed Bugs and Malfunctions
- Multiple bugs has been eliminated in the specialized decode feature.
Own Id: OTP-18813
Related Id(s): PR-7790
## Improvements and New Features
- Specs have been added to all `asn1ct` API functions.
Own Id: OTP-18804
Related Id(s): PR-7738
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- The `jer` (JSON Encoding Rules) for ASN.1 now use the new `json` module for
encoding and decoding JSON. Thus, there is no longer any need for an external
JSON library.
Own Id: OTP-19018
Related Id(s): PR-8241
*** HIGHLIGHT ***
> #### Full runtime dependencies of asn1-5.3
>
> erts-14.0, kernel-9.0, stdlib-5.0
# common_test-1.27
## Improvements and New Features
- Calls to ct:capture_start/0 and ct:capture_stop/0 are now synchronous to
ensure that all output is captured.
Own Id: OTP-18658
Related Id(s): PR-7380
- The order in which multiple hooks are executed can now be reversed after each
config function. See CTH Execution Order.
Own Id: OTP-18682
Related Id(s): ERIERL-43, GH-7397, PR-7496
- The default CSS will now include a basic dark mode handling if it is preferred
by the browser.
Own Id: OTP-18761
Related Id(s): PR-7428
- `-callback` attributes have been added to `ct_suite` and `ct_hooks`.
Own Id: OTP-18781
Related Id(s): PR-7701
- The built-in cth_log_redirect hook can now be configured to replace default
logger reports in terminal with HTML logs.
Own Id: OTP-18875
Related Id(s): PR-7891
- Error handling for the `ct_property_test` framework has been enhanced.
Own Id: OTP-18881
Related Id(s): PR-7824
- Enhance test case documentation, making it clear how a test case can be
failed.
Own Id: OTP-18892
Related Id(s): PR-7869
- The failing line in the test source code is now colored to make it easier to
find on the screen.
Own Id: OTP-18898
Related Id(s): PR-7917
- Function specifications and types have been added to all public API functions.
Own Id: OTP-18913
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- The suite execution elapsed time is now included in the index page.
Own Id: OTP-18981
Related Id(s): GH-7972, PR-8112
> #### Full runtime dependencies of common_test-1.27
>
> 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-8.5
## Fixed Bugs and Malfunctions
- Generators for binary comprehensions could be evaluated before it was known
that they would be needed. That could result in a binary comprehensions
failing if a generator that should not be evaluated until later failed.
As an example, consider this module:
-module(t).
-export([f/0]).
f() ->
<<0 || _ <- [], _ <- ok, false>>.
In Erlang/OTP 26 it would fail like so:
1> t:f().
** exception error: bad generator ok
in function t:f/0 (t.erl, line 6)
In Erlang/OTP 27 it returns an empty binary:
1> t:f().
<<>>
Own Id: OTP-18703
Related Id(s): GH-7494, PR-7538
- The documentation for the preprocessor now mentions that `defined(Name)` can
be called in the condition for an `-if` or `-elif` directive to test whether
`Name` is the name of a defined macro. (This feature was implemented in OTP
21.)
If a function call in an `-if` or `-elif` with a name that is not the name of
a guard BIF, there would not be a compilation error, but would instead cause
the lines following the directive to be skipped. This has now been changed to
be a compilation error.
Own Id: OTP-18784
Related Id(s): GH-7706, PR-7726
*** POTENTIAL INCOMPATIBILITY ***
## Improvements and New Features
- The compiler now emits nicer error message for function head mismatches. For
example, given:
a() -> ok;
a(_) -> error.
Erlang/OTP 26 and earlier would emit a diagnostic similar to:
t.erl:6:1: head mismatch
% 6| a(_) -> error.
% | ^
while in Erlang/OTP 27 the diagnostic is similar to:
t.erl:6:1: head mismatch: function a with arities 0 and 1 is regarded as two distinct functions. Is the number of arguments incorrect or is the semicolon in a/0 unwanted?
% 6| a(_) -> error.
% | ^
Own Id: OTP-18648
Related Id(s): PR-7383
*** HIGHLIGHT ***
- The compiler now optimizes creation of binaries that are known to be constant.
Consider this example:
bin() ->
C = char(),
<<C>>.
char() -> $*.
Essentially, the compiler rewrites the example to the slightly more efficient:
bin() ->
_ = char(),
<<$*>>.
char() -> $*.
Own Id: OTP-18673
Related Id(s): ERIERL-964, PR-7474
- The compiler will now merge consecutive updates of the same record.
As an example, the body of the following function will be combined into a
single tuple creation instruction:
-record(r, {a,b,c,d}).
update(Value) ->
R0 = #r{},
R1 = R0#r{a=Value},
R2 = R1#r{b=2},
R2#r{c=3}.
Own Id: OTP-18680
Related Id(s): ERIERL-967, PR-7491, PR-8086
*** HIGHLIGHT ***
- Improved the performance of the alias analysis pass.
Own Id: OTP-18714
Related Id(s): GH-7432, PR-7528
- `-spec` attributes are now used for documentation.
Own Id: OTP-18801
Related Id(s): PR-7739
- Native coverage support has been implemented in the JIT. It will automatically
be used by the `cover` tool to reduce the execution overhead when running
cover-compiled code.
There are also new APIs to support native coverage without using the `cover`
tool.
To instrument code for native coverage it must be compiled with the
`line_coverage` option.
To enable native coverage in the runtime system, start it like so:
$ erl +JPcover true
There are also the following new functions for supporting native coverage:
- code:coverage_support/0
- code:get_coverage/2
- code:reset_coverage/1
- code:get_coverage_mode/0
- code:get_coverage_mode/1
- code:set_coverage_mode/1
Own Id: OTP-18856
Related Id(s): PR-7856
*** HIGHLIGHT ***
- EEP-59 - Documentation Attributes has been implemented.
Documentation attributes can be used to document functions, types, callbacks,
and modules. The keyword `-moduledoc "Documentation here".` is used to
document modules, while `-doc "Documentation here".` can be used on top of
functions, types, and callbacks to document them, respectively.
- Types, callbacks, and function documentation can be set to `hidden` either
via `-doc false` or `-doc hidden`. When documentation attributes mark a type
as hidden, they will not be part of the documentation.
- The documentation from `moduledoc` and `doc` gets added by default to the
binary beam file, following the format of EEP-48.
- Using the compiler flag `warn_missing_doc` will raise a warning when `-doc`
attributes are missing in exported functions, types, and callbacks.
- Using the compiler flag `warn_missing_spec_documented` will raise a warning
when spec attributes are missing in documented functions, types, and
callbacks.
- `moduledoc`s and `doc`s may refer to external files to be embedded, such as
`-doc {file, "README.md"}.`, which refers to the file `README.md` found in
the current working directory.
- The compiler warns about exported functions whose specs refer to hidden
types. Thus, there will be warnings when a hidden type (meaning, the type is
not part of the documentation) gets used in an exported function.
Own Id: OTP-18916
Related Id(s): PR-7936
*** HIGHLIGHT ***
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- The order in which the compiler looks up options has changed.
When there is a conflict in the compiler options given in the `-compile()`
attribute and options given to the compiler, the options given in the
`-compile()` attribute overrides the option given to the compiler, which in
turn overrides options given in the `ERL_COMPILER_OPTIONS` environment
variable.
Example:
If `some_module.erl` has the following attribute:
-compile([nowarn_missing_spec]).
and the compiler is invoked like so:
% erlc +warn_missing_spec some_module.erl
no warnings will be issued for functions that do not have any specs.
Own Id: OTP-18968
Related Id(s): GH-6979, PR-8093
*** POTENTIAL INCOMPATIBILITY ***
- Safe destructive update of tuples has been implemented in the compiler and
runtime system. This allows the VM to update tuples in-place when it is safe
to do so, thus improving performance by doing less copying but also by
producing less garbage.
Example:
-record(rec, {a,b,c}).
update(#rec{a=needs_update,b=N}=R0) ->
R = R0#rec{a=up_to_date},
if
N < 0 ->
R#rec{c=negative};
N == 0 ->
R#rec{c=zero};
N > 0 ->
R#rec{c=positive}
end.
The record updates in each of the three clauses of the `if` can safely be done
in-place, because variable `R` is not used again.
Own Id: OTP-18972
Related Id(s): PR-8090
*** HIGHLIGHT ***
- Improved the match context reuse optimization slightly, allowing match
contexts to be passed as-is to `bit_size/1` and `byte_size/1`.
Own Id: OTP-18987
- `m:erl_lint` (and by extension the `compiler`) will now warn for code using
deprecated callbacks.
The only callback currenly deprecated is `format_status/2` in `gen_server`,
`gen_event` and `gen_statem`.
You can use `nowarn_deprecated_callback` to silence the warning.
Own Id: OTP-19010
Related Id(s): PR-8205
> #### Full runtime dependencies of compiler-8.5
>
> crypto-5.1, erts-13.0, kernel-8.4, stdlib-6.0
# crypto-5.5
## Improvements and New Features
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- Removed functions `crypto_dyn_iv_init/3` and `crypto_dyn_iv_update/3` which
were marked as deprecated since OTP 25.
Own Id: OTP-18973
- Add support for sm3 hash and hmac.
Own Id: OTP-18975
Related Id(s): PR-6658
- `OPENSSL_thread_stop` is called when `crypto` is purged to not leak thread
specific data.
Own Id: OTP-18978
Related Id(s): PR-7809
- Add SM4 block cipher implemented according to GB/T 32907-2016.
Own Id: OTP-19005
Related Id(s): PR-8168
- The existing function ssl:key_exporter_materials/4 is now documented and
supported.
Own Id: OTP-19016
Related Id(s): PR-8233
*** POTENTIAL INCOMPATIBILITY ***
- Due to another attack on PKCS #1 v1.5 padding, known as the Marvin attack,
about which we were alerted by Hubert Kario from Red Hat. You can find more
details about the attack at https://people.redhat.com/~hkario/marvin/
Functions that may be vulnerable are now deprecated.
Note that you might mitigate the problem by using appropriate versions of
OpenSSL together with our software, but we recommend not using them at all.
Also avoid using TLS versions prior to TLS-1.2 (not supported by default) and
do not enable RSA-key exchange cipher suites (not supported by default).
Own Id: OTP-19075
*** POTENTIAL INCOMPATIBILITY ***
> #### Full runtime dependencies of crypto-5.5
>
> erts-9.0, kernel-5.3, stdlib-3.9
# debugger-5.4
## Fixed Bugs and Malfunctions
- The dependencies for this application are now listed in the app file.
Own Id: OTP-18831
Related Id(s): PR-7441
## Improvements and New Features
- Type specs have been added to all API functions.
Own Id: OTP-18819
Related Id(s): PR-7781
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- The Debugger now use a trace session for its internal use of tracing to avoid
interfering with the user's use of tracing.
Own Id: OTP-19074
Related Id(s): PR-8389
> #### Full runtime dependencies of debugger-5.4
>
> compiler-8.0, erts-15.0, kernel-10.0, stdlib-3.15, wx-2.0
# dialyzer-5.2
## Improvements and New Features
- The `--gui` option for Dialyzer has been removed.
Own Id: OTP-18667
Related Id(s): PR-7443
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of dialyzer-5.2
>
> compiler-8.0, erts-12.0, kernel-8.0, stdlib-5.0, syntax_tools-2.0
# diameter-2.4
## Improvements and New Features
- `-callback` attributes have been added to `diameter_app` and
`diameter_transport`.
Own Id: OTP-18783
Related Id(s): PR-7699
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- Pick peer can now also handle request of type `#diameter_packet{}`.
Own Id: OTP-19090
Related Id(s): PR-8399
> #### Full runtime dependencies of diameter-2.4
>
> erts-10.0, kernel-3.2, ssl-9.0, stdlib-5.0
# edoc-1.3
## Fixed Bugs and Malfunctions
- EEP 48 doc chunks now properly include links within `{@type }` macros.
Own Id: OTP-18945
Related Id(s): PR-8063
- `@hidden` now means `hidden` in EEP 48 doc chunks instead of `none`.
Own Id: OTP-18946
Related Id(s): PR-8063
## Improvements and New Features
- There is a new `edoc_html_to_markdown` module that can be used to convert
EEP-48 `application/html+erlang` to Markdown.
Own Id: OTP-18947
Related Id(s): PR-8063
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- Added module `edoc_doclet_markdown` that can be used to convert EDoc style
documentation to Markdown documentation attributes.
Own Id: OTP-19052
Related Id(s): PR-8308
> #### Full runtime dependencies of edoc-1.3
>
> erts-11.0, inets-5.10, kernel-7.0, stdlib-4.0, syntax_tools-2.0, xmerl-1.3.7
# eldap-1.2.13
## Improvements and New Features
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of eldap-1.2.13
>
> asn1-3.0, erts-6.0, kernel-3.0, ssl-5.3.4, stdlib-3.4
# erl_interface-5.5.2
## Improvements and New Features
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
## Known Bugs and Problems
- 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.
Own Id: OTP-16607
Related Id(s): OTP-16608
# erts-15.0
## Fixed Bugs and Malfunctions
- Bugs in how `erl -extra` interacts with passing flags via ERL\_\*FLAGS or
`-args_file` have been fixed.
Own Id: OTP-18766
Related Id(s): PR-7639
- Fixed a bug that prevented the emulator from building on recent versions of
Yocto Linux.
Own Id: OTP-18918
Related Id(s): PR-7952
- Fixed spectre mitigation configure test to work with GCC patches to always add
`-fcf-protection=full`.
Own Id: OTP-18928
Related Id(s): PR-8006
- A call to `socket:recv|recvfrom|recvmsg/*` with Timeout = 0 on Windows could
cause a (case clause) crash if data is immediately available.
Own Id: OTP-19063
Related Id(s): OTP-18835
- Fix bug on Windows where `exit_status` would not be sent when a port exits
after the stdin/stdout handles have been closed.
Own Id: OTP-19077
Related Id(s): PR-8324
## Improvements and New Features
- Refactored how the JIT handles POSIX signals and how they affect thread
stacks, allowing us to use the native stack register for Erlang stacks on more
platforms.
Notably, containers built on 64-bit x86 Alpine Linux images will now perform
much better in sequential code. As an example, running `dialyzer` over the OTP
code base finishes about 15% quicker.
Own Id: OTP-18568
Related Id(s): PR-7174
- The `instrument` module can now track allocations on a per-process or
per-port basis.
Own Id: OTP-18577
Related Id(s): PR-7236
- The `pid` field returned from `erlang:fun_info/1,2` is now always the pid for
the `init` process of the local node, not the pid for the actual process that
created the fun.
Own Id: OTP-18594
Related Id(s): PR-7274
*** POTENTIAL INCOMPATIBILITY ***
- By default, escripts will now be compiled instead of interpreted. That means
that the `compiler` application must be installed.
Own Id: OTP-18639
Related Id(s): PR-7348
*** POTENTIAL INCOMPATIBILITY ***
- A binary returned from the `socket` receive functions is no longer created
as a sub binary of an often large receive buffer binary (socket option
`{otp,rcvbuf}`). This avoids space waste, trusting the allocators to implement
reallocation efficiently.
Own Id: OTP-18642
Related Id(s): GH-6152, PR-7465
- The default process limit has been raised to `1048576` processes.
Own Id: OTP-18699
Related Id(s): PR-7388
- The erlang:system_monitor/2 functionality is now able to monitor long
message queues in the system.
Own Id: OTP-18709
Related Id(s): PR-7651
- The `erl` command now supports the `-S` flag, which is similar to the `-run`
flag, except that it will pass all arguments up to end of the command line to
the called function. (The `-run` flag will not pass arguments beginning with a
hyphen.) Another difference is that `-S` will always call a function with one
argument, passing an empty list if no arguments were given.
Own Id: OTP-18744
Related Id(s): PR-7470
*** HIGHLIGHT ***
- When implementing an alternative carrier for the Erlang distribution, a
separate input handler process may now be registered, using
erlang:dist_ctrl_input_handler/2, also in the case when the distribution
controller is a port.
Own Id: OTP-18774
Related Id(s): PR-7110
- The call stack trace has now been added to the error reported by
erlang:process_flag/2 when `max_heap_size` limit has been exceeded.
Own Id: OTP-18779
Related Id(s): PR-7592
- `-callback` attributes have been added to `erl_tracer`.
Own Id: OTP-18794
Related Id(s): PR-7703
- For `inet_backend = socket`, setting the `active` socket option alone, to
`once`, `true` or `N` has been optimized, as well as the corresponding data
delivery.
Own Id: OTP-18835
- New functions `socket:sendv/*` for sending I/O vectors have been added.
Own Id: OTP-18845
- Socket options that take string now also accept binaries.
Own Id: OTP-18849
Related Id(s): PR-6510
- Native coverage support has been implemented in the JIT. It will automatically
be used by the `cover` tool to reduce the execution overhead when running
cover-compiled code.
There are also new APIs to support native coverage without using the `cover`
tool.
To instrument code for native coverage it must be compiled with the
`line_coverage` option.
To enable native coverage in the runtime system, start it like so:
$ erl +JPcover true
There are also the following new functions for supporting native coverage:
- code:coverage_support/0
- code:get_coverage/2
- code:reset_coverage/1
- code:get_coverage_mode/0
- code:get_coverage_mode/1
- code:set_coverage_mode/1
Own Id: OTP-18856
Related Id(s): PR-7856
*** HIGHLIGHT ***
- Changed the default value of the command line flag `-code_path_choice` to
`strict`.
Note that for application systems using archives, it is necessary to add the
`code_path_choice relaxed` to the command line that invokes `erl`.
Own Id: OTP-18894
Related Id(s): PR-7243
- Added module loading to `erl -init_debug` printouts.
Own Id: OTP-18929
Related Id(s): PR-8004
- When the runtime system halts, it performs various flush operations before
terminating. By default there is no limit on how much time the flush
operations are allowed to take. A new _halt flush timeout_ functionality has
been introduced which can be used for limiting the amount of time that the
flushing operations are allowed to take. For more information see the
documentation of the `flush_timeout` option of the erlang:halt/2 BIF and
the documentation of the `erl` `+zhft <Timeout>` command line flag.
Own Id: OTP-18938
Related Id(s): GH-7438, PR-8035
- Optimized code loading by moving certain operations from the code server to
the caller.
Own Id: OTP-18941
Related Id(s): PR-7981
- Updated asmjit to version a465fe71ab3d0e224b2b4bd0fac69ae68ab9239d
Own Id: OTP-18942
- The deprecated functions in `zlib` have been removed. That includes
`inflateChunk/{1,2}`, `getBufSize/1`, `setBufSize/2`, the CRC32 functions, and
the Adler checksum functions.
Own Id: OTP-18950
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- Safe destructive update of tuples has been implemented in the compiler and
runtime system. This allows the VM to update tuples in-place when it is safe
to do so, thus improving performance by doing less copying but also by
producing less garbage.
Example:
-record(rec, {a,b,c}).
update(#rec{a=needs_update,b=N}=R0) ->
R = R0#rec{a=up_to_date},
if
N < 0 ->
R#rec{c=negative};
N == 0 ->
R#rec{c=zero};
N > 0 ->
R#rec{c=positive}
end.
The record updates in each of the three clauses of the `if` can safely be done
in-place, because variable `R` is not used again.
Own Id: OTP-18972
Related Id(s): PR-8090
*** HIGHLIGHT ***
- The obsolete and undocumented support for opening a port to an external
resource by passing an atom (or a string) as first argument to `open_port()`,
implemented by the vanilla driver, has been removed. This feature has been
scheduled for removal in OTP 27 since the release of OTP 26.
Own Id: OTP-18976
Related Id(s): PR-7125
- An optional NIF callback `ERL_NIF_OPT_ON_UNLOAD_THREAD` to be called by all
scheduler threads when a NIF library is unloaded. Used for releasing thread
specific data. Can be set with function `enif_set_option`.
Own Id: OTP-18977
Related Id(s): PR-7809
- There is a new module `trace` in Kernel providing the same trace
functionality as erlang:trace/3 and erlang:trace_pattern/3, but with the
addition of **dynamic isolated trace sessions**.
Own Id: OTP-18980
*** HIGHLIGHT ***
- Added the `+MMlp on|off` emulator option to let the `mseg` allocator use
"large pages" (sometimes known as "huge pages" or "super pages"). This
currently only affects super-carrier allocations, but may be extended in the
future.
Own Id: OTP-18984
Related Id(s): PR-7977
- `inet_backend = socket` has been optimized and reworked to be more compatible
with the original `inet_backend = inet`.
Own Id: OTP-19004
Related Id(s): OTP-18835
- The `socket` documentation has been reworked, and due to that a few details
were fixed:
- socket:is_supported/1 now returns `true` for example for `protocols` that
is a "category", not an item.
- socket:cancel_monitor/1 no longer badargs for a monitor that was set by
another process, instead it returns `false` as for other unknown
`reference()`s.
Own Id: OTP-19054
> #### Full runtime dependencies of erts-15.0
>
> kernel-9.0, sasl-3.3, stdlib-4.1
# et-1.7.1
## Fixed Bugs and Malfunctions
- The dependencies for this application are now listed in the app file.
Own Id: OTP-18831
Related Id(s): PR-7441
- Dialyzer warnings due to type specs added in `dbg` have been eliminated.
Own Id: OTP-18860
## Improvements and New Features
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of et-1.7.1
>
> erts-9.0, kernel-5.3, runtime_tools-1.10, stdlib-3.4, wx-1.2
# eunit-2.9.1
## Improvements and New Features
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of eunit-2.9.1
>
> erts-9.0, kernel-5.3, stdlib-3.4
# ftp-1.2.2
## Fixed Bugs and Malfunctions
- Dialyzer warnings due to type specs added in `dbg` have been eliminated.
Own Id: OTP-18860
## Improvements and New Features
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of ftp-1.2.2
>
> erts-7.0, kernel-6.0, runtime_tools-1.15.1, ssl-10.2, stdlib-3.5
# inets-9.2
## Improvements and New Features
- Introduced a default value for httpd_server name configuration to improve ease
of use.
Own Id: OTP-18641
Related Id(s): PR-7316
*** POTENTIAL INCOMPATIBILITY ***
- The `httpd` module has been extended with an API for simple serving directory
content over HTTP. With this change, the current working directory can be
served like this:
erl -S httpd
An arbitrary directory can be served like this:
erl -S httpd serve path/to/dir
Own Id: OTP-18727
Related Id(s): PR-7299
- Added `-callback` attributes to `httpd`, `mod_esi`, and `mod_security`.
Own Id: OTP-18786
Related Id(s): PR-7700
- Inets now uses a relative redirect with an absolute path to prevent whoever is
running Inets from having to configure the `ServerName` to match the
network-reachable host name of the server.
Own Id: OTP-18809
Related Id(s): GH-7617, PR-7678
- `inets` processes now use proc_lib:set_label/1 to improve observeability.
Own Id: OTP-18927
Related Id(s): PR-8029
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- The implementations of http_uri:encode/1 and http_uri:decode/1 are now
replaced with their equivalent, but bug free versions from module
`uri_string`, namely uri_string:quote/1 and uri_string:unquote/1.
Own Id: OTP-19022
*** POTENTIAL INCOMPATIBILITY ***
- With this change, the API specs are updated.
Own Id: OTP-19033
> #### Full runtime dependencies of inets-9.2
>
> erts-14.0, kernel-9.0, mnesia-4.12, public_key-1.13, runtime_tools-1.8.14,
> ssl-9.0, stdlib-5.0, stdlib-6.0
# jinterface-1.14.1
## Improvements and New Features
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
# kernel-10.0
## Fixed Bugs and Malfunctions
- Fixed a crash when calling file:delete/2 with an empty option list.
Own Id: OTP-18590
Related Id(s): PR-7220
- New functions have been added to the undocumented module `inet_dns` that
take a flag to specify if encode/decode is for mDNS. This affects how CLASS
values in the private range, with the top bit set, are handled.
Own Id: OTP-18878
Related Id(s): GH-7718, OTP-17734
- The error information for erlang:phash/2 has been corrected.
Own Id: OTP-18904
Related Id(s): PR-7960
- `get_until` requests using the I/O protocol now correctly return a binary or
list when `eof` is the last item returned by the callback.
Own Id: OTP-18930
Related Id(s): GH-4992, PR-7993
- Calling logger:add_handlers/1 with config option now works.
Own Id: OTP-18954
Related Id(s): GH-8061, PR-8076
- The code:del_path/1 function now also works on paths added through `-pa`,
`-pz` , `-path` and the boot script.
Own Id: OTP-18959
Related Id(s): GH-6692, PR-7697
- A call to `socket:recv|recvfrom|recvmsg/*` with Timeout = 0 on Windows could
cause a (case clause) crash if data is immediately available.
Own Id: OTP-19063
Related Id(s): OTP-18835
- Improve heuristic for when a characters is wide in the shell for systems with
old libc versions.
Own Id: OTP-19087
Related Id(s): PR-8382
- Fix reading a line when reading from io:user/0 to not consider `\r` without
`\n` to be a new line when `erl` is started with `-noshell`.
Own Id: OTP-19088
Related Id(s): GH-8360, PR-8396
## Improvements and New Features
- Added file:read_file/2 with a `raw` option for reading files without going
through the file server.
Own Id: OTP-18589
Related Id(s): PR-7220
- The undocumented Erlang DNS resolver library (`inet_dns` and `inet_res`) has
been augmented to handle IXFR, NOTIFY, UPDATE and TSIG records. With this some
bug fixes and code cleanup has been done, and the resolver used in the test
suite has been changed to Knot DNS. See the source code.
Kudos to Alexander Clouter that did almost all the work!
Own Id: OTP-18713
Related Id(s): GH-6985, PR-6985
- The `ebin` directories for escripts are now cached.
Own Id: OTP-18778
Related Id(s): PR-7556
- `-callback` attributes haven been added to `application`,
`logger_handler`, and `logger_formatter`.
Own Id: OTP-18795
Related Id(s): PR-7703
- Progress reports from before logger is started are now logged when log level
is set to debug.
Own Id: OTP-18807
Related Id(s): ERIERL-985, PR-7732
- The code:where_is_file/2 and code:which/1 functions now check for
existence of the file directly instead of listing the content of each
directory in the code path.
Own Id: OTP-18816
Related Id(s): PR-7711
- Type specs has been added to the `logger:Level/1,2,3` functions.
Own Id: OTP-18820
Related Id(s): PR-7779
- For `inet_backend = socket`, setting the `active` socket option alone, to
`once`, `true` or `N` has been optimized, as well as the corresponding data
delivery.
Own Id: OTP-18835
- New functions `socket:sendv/*` for sending I/O vectors have been added.
Own Id: OTP-18845
- The shell now pages long output from the documentation help command
(`h(Module)`), auto completions and the search command.
Own Id: OTP-18846
Related Id(s): PR-7845
- Native coverage support has been implemented in the JIT. It will automatically
be used by the `cover` tool to reduce the execution overhead when running
cover-compiled code.
There are also new APIs to support native coverage without using the `cover`
tool.
To instrument code for native coverage it must be compiled with the
`line_coverage` option.
To enable native coverage in the runtime system, start it like so:
$ erl +JPcover true
There are also the following new functions for supporting native coverage:
- code:coverage_support/0
- code:get_coverage/2
- code:reset_coverage/1
- code:get_coverage_mode/0
- code:get_coverage_mode/1
- code:set_coverage_mode/1
Own Id: OTP-18856
Related Id(s): PR-7856
*** HIGHLIGHT ***
- Optimized code loading by moving certain operations from the code server to
the caller.
Own Id: OTP-18941
Related Id(s): PR-7981
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- Application startup has been optimized by removing an intermediary process.
Own Id: OTP-18963
Related Id(s): PR-8042
- The existing experimental support for archive files will be changed in a
future release. The support for having an archive in an escript will remain,
but the support for using archives in a release will either become more
limited or completely removed.
As of Erlang/OTP 27, the function code:lib_dir/2, the `-code_path_choice`
flag, and using `erl_prim_loader` for reading members of an archive are
deprecated.
To remain compatible with future version of Erlang/OTP `escript` scripts that
need to retrieve data files from its archive should use escript:extract/2
instead of `erl_prim_loader` and code:lib_dir/2.
Own Id: OTP-18966
Related Id(s): PR-8091
*** POTENTIAL INCOMPATIBILITY ***
- The undocumented and deprecated `file:pid2name` function has been removed.
Own Id: OTP-18967
Related Id(s): PR-8092
- There is a new module `trace` in Kernel providing the same trace
functionality as erlang:trace/3 and erlang:trace_pattern/3, but with the
addition of **dynamic isolated trace sessions**.
Own Id: OTP-18980
*** HIGHLIGHT ***
- Error logging has been improved when the io:standard_io/0 reader and/or
writer terminates with an error.
Own Id: OTP-18989
Related Id(s): PR-8103
- `inet_backend = socket` has been optimized and reworked to be more compatible
with the original `inet_backend = inet`.
Own Id: OTP-19004
Related Id(s): OTP-18835
- Add an simple example (echo server) )to the socket users guide.
Own Id: OTP-19042
- `inet:i/0,1,2` has been improved to allow port numbers to be shown explicitly.
Own Id: OTP-19053
Related Id(s): #6724
- The `socket` documentation has been reworked, and due to that a few details
were fixed:
- socket:is_supported/1 now returns `true` for example for `protocols` that
is a "category", not an item.
- socket:cancel_monitor/1 no longer badargs for a monitor that was set by
another process, instead it returns `false` as for other unknown
`reference()`s.
Own Id: OTP-19054
- Add `stdin`, `stdout` and `stderr` keys to io:getopts/1 on
io:standard_io/0 to indicate if the respective I/O device is backed by a
terminal.
Own Id: OTP-19089
Related Id(s): PR-8396
> #### Full runtime dependencies of kernel-10.0
>
> crypto-5.0, erts-15.0, sasl-3.0, stdlib-6.0
# megaco-4.6
## Improvements and New Features
- `-callback` attributes have been added to `megaco_transport`.
Own Id: OTP-18806
Related Id(s): PR-7740
- Updated types and specs for all API modules.
Own Id: OTP-18920
Related Id(s): BL-322
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of megaco-4.6
>
> asn1-3.0, debugger-4.0, erts-12.0, et-1.5, kernel-8.0, runtime_tools-1.8.14,
> stdlib-2.5
# mnesia-4.23.2
## Fixed Bugs and Malfunctions
- The `mnesia_registry` module have been deprecated.
Own Id: OTP-18994
## Improvements and New Features
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of mnesia-4.23.2
>
> erts-9.0, kernel-5.3, stdlib-5.0
# observer-2.16
## Fixed Bugs and Malfunctions
- The dependencies for this application are now listed in the app file.
Own Id: OTP-18831
Related Id(s): PR-7441
## Improvements and New Features
- The new function proc_lib:set_label/1 can be used to add a descriptive term
to any process that does not have a registered name. The name will be shown by
tools such as `\c:i/0`, `observer`, and it will be included in crash reports
produced by processes using `gen_server`, `gen_statem`, `gen_event`, and
`gen_fsm`.
The label for a process can be retrieved by calling proc_lib:get_label/1.
Note that those functions work on any process, not only processes that use
`proc_lib`.
Example:
1> self().
<0.90.0>
2> proc_lib:set_label(my_label).
ok
3> i().
.
.
.
<0.90.0> erlang:apply/2 2586 75011 0
my_label c:pinfo/2 51
4> proc_lib:get_label(self()).
my_label
Own Id: OTP-18789
Related Id(s): PR-7720, PR-8003
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- `m:etop` has been updated to use dbg:session/2 in order to not interfere
with any other tracing.
Own Id: OTP-19082
Related Id(s): PR-8363
> #### Full runtime dependencies of observer-2.16
>
> erts-15.0, et-1.5, kernel-10.0, runtime_tools-2.1, stdlib-5.0, wx-2.3
# odbc-2.14.3
## Fixed Bugs and Malfunctions
- The order of libs in the Makefile has been changed to avoid finding the
system's `libei` instead of Erlang's `libei`.
Own Id: OTP-19030
Related Id(s): GH-8244, PR-8258
## Improvements and New Features
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of odbc-2.14.3
>
> erts-6.0, kernel-3.0, stdlib-2.0
# os_mon-2.10
## Improvements and New Features
- Function specifications and types have been added to all public API functions.
Own Id: OTP-18913
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of os_mon-2.10
>
> erts-14.0, kernel-9.0, sasl-4.2.1, stdlib-5.0
# parsetools-2.6
## Improvements and New Features
- The `leex` documentation has been updated to use specs for documenting the
generated interface.
Own Id: OTP-18796
Related Id(s): PR-7703
- yecc now wraps the `-module` attribute with `-file` to indicate the `.yrl`
source file.
Own Id: OTP-18912
Related Id(s): PR-7963
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of parsetools-2.6
>
> erts-6.0, kernel-3.0, stdlib-3.4
# public_key-1.16
## Improvements and New Features
- The `ssl` client can negotiate and handle certificate status request (OCSP
stapling support on the client side).
Thanks to voltone for interop testing and related discussions.
Own Id: OTP-18606
Related Id(s): OTP-16448, OTP-16875
*** HIGHLIGHT ***
- The exception reason when public_key:cacerts_get/0 failed has been improved.
Own Id: OTP-18609
Related Id(s): GH-7295, PR-7302
- Key customization support has been extended to allow flexibility for
implementers of for instance hardware security modules (HSM) or trusted
platform modules (TPM).
Own Id: OTP-18876
Related Id(s): PR-7475, PR-7898
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- The existing function ssl:key_exporter_materials/4 is now documented and
supported.
Own Id: OTP-19016
Related Id(s): PR-8233
*** POTENTIAL INCOMPATIBILITY ***
- Due to another attack on PKCS #1 v1.5 padding, known as the Marvin attack,
about which we were alerted by Hubert Kario from Red Hat. You can find more
details about the attack at https://people.redhat.com/~hkario/marvin/
Functions that may be vulnerable are now deprecated.
Note that you might mitigate the problem by using appropriate versions of
OpenSSL together with our software, but we recommend not using them at all.
Also avoid using TLS versions prior to TLS-1.2 (not supported by default) and
do not enable RSA-key exchange cipher suites (not supported by default).
Own Id: OTP-19075
*** POTENTIAL INCOMPATIBILITY ***
> #### Full runtime dependencies of public_key-1.16
>
> asn1-3.0, crypto-4.6, erts-6.0, kernel-3.0, stdlib-3.5
# reltool-1.0.1
## Fixed Bugs and Malfunctions
- The dependencies for this application are now listed in the app file.
Own Id: OTP-18831
Related Id(s): PR-7441
## Improvements and New Features
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of reltool-1.0.1
>
> erts-15.0, kernel-9.0, sasl-4.2.1, stdlib-5.0, tools-2.6.14, wx-2.3
# runtime_tools-2.1
## Improvements and New Features
- The `instrument` module can now track allocations on a per-process or
per-port basis.
Own Id: OTP-18577
Related Id(s): PR-7236
- The new function proc_lib:set_label/1 can be used to add a descriptive term
to any process that does not have a registered name. The name will be shown by
tools such as `\c:i/0`, `observer`, and it will be included in crash reports
produced by processes using `gen_server`, `gen_statem`, `gen_event`, and
`gen_fsm`.
The label for a process can be retrieved by calling proc_lib:get_label/1.
Note that those functions work on any process, not only processes that use
`proc_lib`.
Example:
1> self().
<0.90.0>
2> proc_lib:set_label(my_label).
ok
3> i().
.
.
.
<0.90.0> erlang:apply/2 2586 75011 0
my_label c:pinfo/2 51
4> proc_lib:get_label(self()).
my_label
Own Id: OTP-18789
Related Id(s): PR-7720, PR-8003
- Type specs had been added to all `dbg` functions.
Own Id: OTP-18859
Related Id(s): PR-7782
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- `m:dbg` have been updated to use trace sessions.
dbg:session_create/1, dbg:session/2, and dbg:session_destroy/1 have been
added to work sessions. See the documentation for details.
Own Id: OTP-19081
Related Id(s): PR-8363
> #### Full runtime dependencies of runtime_tools-2.1
>
> erts-15.0, kernel-10.0, mnesia-4.12, stdlib-6.0
# sasl-4.2.2
## Improvements and New Features
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of sasl-4.2.2
>
> erts-15.0, kernel-6.0, stdlib-4.0, tools-2.6.14
# snmp-5.16
## Improvements and New Features
- `-callback` attributes have been added to modules
`snmpa_network_interface_filter`, `snmpa_notification_filter`,
`snmpm_network_interface_filter`, `snmpm_user`, and
`snmpa_notification_delivery_info_receiver`.
New `-type` attributes have also been added to modules `snmp`, `snmpa`,
`snmpm`, and `snmpa_conf` to support the previously mentioned callbacks.
Own Id: OTP-18785
Related Id(s): PR-7702
- Updated types and specs for all API modules.
Own Id: OTP-18934
Related Id(s): BL-312
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of snmp-5.16
>
> crypto-4.6, erts-12.0, kernel-8.0, mnesia-4.12, runtime_tools-1.8.14,
> stdlib-5.0
# ssh-5.2
## Fixed Bugs and Malfunctions
- SSH processes are now assigned labels for troubleshooting purposes.
Own Id: OTP-19017
Related Id(s): PR-8249
- With this change, ssh client will automatically adjust transfer window size
for commands executed remotely over SSH.
Own Id: OTP-19057
Related Id(s): GH-7483, PR-8345
## Improvements and New Features
- The shell now pages long output from the documentation help command
(`h(Module)`), auto completions and the search command.
Own Id: OTP-18846
Related Id(s): PR-7845
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- Updated types and specs for all API modules.
Own Id: OTP-18961
> #### Full runtime dependencies of ssh-5.2
>
> crypto-5.0, erts-14.0, kernel-9.0, public_key-1.6.1, runtime_tools-1.15.1,
> stdlib-5.0, stdlib-6.0
# ssl-11.2
## Fixed Bugs and Malfunctions
- Starting a TLS server without sufficient credentials (certificate or anonymous
cipher) would work, but it was impossible to connect to it.
This has been corrected to return an error instead of starting the server.
Own Id: OTP-18887
Related Id(s): GH-7493, PR-7918
- ASN.1 decoding errors are handled in more places to ensure that errors are
returned instead of cause a crash.
Own Id: OTP-18969
Related Id(s): GH-8058, PR-8256
- Improved error checking on the API functions.
Own Id: OTP-18992
Related Id(s): GH-8066, PR-8156
## Improvements and New Features
- The `ssl` client can negotiate and handle certificate status request (OCSP
stapling support on the client side).
Thanks to voltone for interop testing and related discussions.
Own Id: OTP-18606
Related Id(s): OTP-16448, OTP-16875
*** HIGHLIGHT ***
- Memory consumption has been reduced and performance increased by refactoring
internal data structures and their usage.
Own Id: OTP-18665
Related Id(s): PR-7447
- Added ssl_crl_cache_api:lookup/2 as an optional `-callback` attribute.
Own Id: OTP-18788
Related Id(s): PR-7700
- Key customization support has been extended to allow flexibility for
implementers of for instance hardware security modules (HSM) or trusted
platform modules (TPM).
Own Id: OTP-18876
Related Id(s): PR-7475, PR-7898
- The proc_lib:set_label/1 function is now used to increase observability of
`ssl` processes.
Own Id: OTP-18879
- Brainpool elliptic curves are now supported in TLS-1.3.
Own Id: OTP-18884
Related Id(s): PR-8056
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- For security reasons, the CBC ciphers are now longer included in the list of
default ciphers for TLS-1.2.
Own Id: OTP-19025
Related Id(s): PR-8250
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
- There is a new `cert_policy_opts` option to configure certificate policy
options for the certificate path validation.
Own Id: OTP-19027
Related Id(s): PR-8255
> #### Full runtime dependencies of ssl-11.2
>
> crypto-5.0, erts-15.0, inets-5.10.7, kernel-9.0, public_key-1.15,
> runtime_tools-1.15.1, stdlib-6.0
# stdlib-6.0
## Fixed Bugs and Malfunctions
- The specs in module `binary` has been updated to reflect what is allowed by
the documentation.
Own Id: OTP-18684
Related Id(s): PR-7481
- Several functions in the `binary` module would accept arguments of the wrong
type under certain circumstances. In this release, they now raise an exception
when incorrect types are given.
The following functions would accept an invalid pattern if the subject binary
was empty or if the `{scope,{0,0}}` option was given: `binary:match/2,3`,
`binary:matches/2,3`, `binary:replace/3,4`, and `binary:split/2,3`
The call `binary:copy(<<1:1>>, 0)` would return an empty binary instead of
raising an exception. Similarly, calls to `binary:part/2,3` attempting to
extract 0 bytes at position 0 of a bitstring would return an empty binary
instead of raising an exception.
Own Id: OTP-18743
Related Id(s): PR-7607, PR-7628
- The documentation for the preprocessor now mentions that `defined(Name)` can
be called in the condition for an `-if` or `-elif` directive to test whether
`Name` is the name of a defined macro. (This feature was implemented in OTP
21.)
If a function call in an `-if` or `-elif` with a name that is not the name of
a guard BIF, there would not be a compilation error, but would instead cause
the lines following the directive to be skipped. This has now been changed to
be a compilation error.
Own Id: OTP-18784
Related Id(s): GH-7706, PR-7726
*** POTENTIAL INCOMPATIBILITY ***
- `get_until` requests using the I/O protocol now correctly return a binary or
list when `eof` is the last item returned by the callback.
Own Id: OTP-18930
Related Id(s): GH-4992, PR-7993
- The error handling the `simple_one_for_one` supervisor has been enhanced. A
transient child returning `ignore` will no longer cause a crash.
Also, automatic shutdown has been disabled because it does not make sense for
this supervisor type. That is was allowed is considered a bug. Therefore, we
don't consider this an incompatible change.
Own Id: OTP-19029
Related Id(s): PR-8230
*** POTENTIAL INCOMPATIBILITY ***
- Fix shell expansion to not crash when expanding a map with non-atom keys and
to not list zero arity functions when an argument has been given.
Own Id: OTP-19073
Related Id(s): GH-8364, GH-8365, GH-8366, PR-8375
## Improvements and New Features
- The functions `is_equal/2`, `map/2`, and `filtermap/2` have been added to the
modules `sets`, `ordsets`, and `gb_sets`.
Own Id: OTP-18622
Related Id(s): PR-7183, PR-7232
*** HIGHLIGHT ***
- The compiler now emits nicer error message for function head mismatches. For
example, given:
a() -> ok;
a(_) -> error.
Erlang/OTP 26 and earlier would emit a diagnostic similar to:
t.erl:6:1: head mismatch
% 6| a(_) -> error.
% | ^
while in Erlang/OTP 27 the diagnostic is similar to:
t.erl:6:1: head mismatch: function a with arities 0 and 1 is regarded as two distinct functions. Is the number of arguments incorrect or is the semicolon in a/0 unwanted?
% 6| a(_) -> error.
% | ^
Own Id: OTP-18648
Related Id(s): PR-7383
*** HIGHLIGHT ***
- `zip:create/2,3` will now tolerate POSIX timestamps in the provided
`file_info` records.
Own Id: OTP-18668
- The callback function gen_statem:handle_event/4 has been cached in the
`gen_statem` engine to optimize callback call speed.
Own Id: OTP-18671
Related Id(s): PR-7419
- The type beam_lib:beam/0 is now exported.
Own Id: OTP-18716
Related Id(s): PR-7534
- The documentation for the `binary` module has been improved.
Own Id: OTP-18741
Related Id(s): PR-7585
- `binary:replace/3,4` now supports using a fun for supplying the replacement
binary.
Own Id: OTP-18742
Related Id(s): PR-7590
- Triple-Quoted Strings has been implemented as per EEP 64. See String in the
Reference Manual.
Example:
1> """
a
b
c
""".
"a\nb\nc"
Adjacent string literals without intervening white space is now a syntax
error, to avoid possible confusion with triple-quoted strings. For example:
1> "abc""xyz".
"xyz".
* 1:6: adjacent string literals without intervening white space
Own Id: OTP-18750
Related Id(s): PR-7313, PR-7451, OTP-18746
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
- The new function proc_lib:set_label/1 can be used to add a descriptive term
to any process that does not have a registered name. The name will be shown by
tools such as `\c:i/0`, `observer`, and it will be included in crash reports
produced by processes using `gen_server`, `gen_statem`, `gen_event`, and
`gen_fsm`.
The label for a process can be retrieved by calling proc_lib:get_label/1.
Note that those functions work on any process, not only processes that use
`proc_lib`.
Example:
1> self().
<0.90.0>
2> proc_lib:set_label(my_label).
ok
3> i().
.
.
.
<0.90.0> erlang:apply/2 2586 75011 0
my_label c:pinfo/2 51
4> proc_lib:get_label(self()).
my_label
Own Id: OTP-18789
Related Id(s): PR-7720, PR-8003
- `-callback` attributes has been added to modules `sys` and `erl_error`.
Own Id: OTP-18793
Related Id(s): PR-7703
- Several new functions that accept funs have been added to module `timer`.
Functions `apply_after/2`, `apply_interval/2`, and `apply_repeatedly/2` accept
a nullary fun as the second argument, while functions `apply_after/3`,
`apply_interval/3`, and `apply_repeatedly/3` accept an n-ary fun as the second
and a list of n arguments for the fun as the third argument.
Own Id: OTP-18808
Related Id(s): PR-7649
*** HIGHLIGHT ***
- Sigils on string literals have been implemented as per EEP 66, that is:
binary and string sigils in verbatim and escape characters variants, as well
as a default (vanilla) Sigil. All for ordinary strings and for triple-quoted
strings (EEP 64). See Sigils in the Reference Manual.
Examples:
1> ~"Björn".
<<"Björn"/utf8>>
2> ~b"Björn".
<<"Björn"/utf8>>
3> ~S"\s*(\w+)".
"\\s*(\\w+)"
4> ~B"\s*(\w+)".
<<"\\s*(\\w+)">>
Own Id: OTP-18825
Related Id(s): PR-7684, OTP-18750
*** HIGHLIGHT ***
- Functions shell:default_multiline_prompt/1, shell:inverted_space_prompt/1,
and shell:prompt_width/1 have been exported to help with custom prompt
implementations.
Own Id: OTP-18834
Related Id(s): PR-7675, PR-7816
- The shell now pages long output from the documentation help command
(`h(Module)`), auto completions and the search command.
Own Id: OTP-18846
Related Id(s): PR-7845
- The `M-h` hotkey (Alt/Option-h) now outputs help for the module or function
directly before the cursor.
Own Id: OTP-18847
Related Id(s): PR-7846
- Added support for adding a custom code formatter that formats your multi-line
shell commands in your preferred formatting on submission. See
`shell:format_shell_func/` and shell:erl_pp_format_func/1.
Own Id: OTP-18848
Related Id(s): PR-7847
- Added shell functions for viewing, forgetting and saving locally defined
functions, types and records.
Own Id: OTP-18852
Related Id(s): PR-7844
- Added string:jaro_similarity/2, which can be used to calculate the
similarity between two strings.
Own Id: OTP-18865
Related Id(s): PR-7879
- The new function ets:update_element/4 is similar to ets:update_element/3,
but takes a default tuple as the fourth argument, which will be inserted if no
previous record with that key exists.
Own Id: OTP-18870
Related Id(s): PR-7857
- Added functions to retrieve the next higher or lower key/element from
`gb_trees` and `gb_sets`, as well as returning iterators that start at
given keys/elements.
Own Id: OTP-18874
Related Id(s): PR-7745
- When the shell built-in function `c/1,2` is used to re-compile a
module, the current working directory of the original compilation is now added
to the include path.
Own Id: OTP-18908
Related Id(s): PR-7957
- The `timer` module now uses a private table for its internal state, slightly
improving its performance.
Own Id: OTP-18914
Related Id(s): PR-7973
- EEP-59 - Documentation Attributes has been implemented.
Documentation attributes can be used to document functions, types, callbacks,
and modules. The keyword `-moduledoc "Documentation here".` is used to
document modules, while `-doc "Documentation here".` can be used on top of
functions, types, and callbacks to document them, respectively.
- Types, callbacks, and function documentation can be set to `hidden` either
via `-doc false` or `-doc hidden`. When documentation attributes mark a type
as hidden, they will not be part of the documentation.
- The documentation from `moduledoc` and `doc` gets added by default to the
binary beam file, following the format of EEP-48.
- Using the compiler flag `warn_missing_doc` will raise a warning when `-doc`
attributes are missing in exported functions, types, and callbacks.
- Using the compiler flag `warn_missing_spec_documented` will raise a warning
when spec attributes are missing in documented functions, types, and
callbacks.
- `moduledoc`s and `doc`s may refer to external files to be embedded, such as
`-doc {file, "README.md"}.`, which refers to the file `README.md` found in
the current working directory.
- The compiler warns about exported functions whose specs refer to hidden
types. Thus, there will be warnings when a hidden type (meaning, the type is
not part of the documentation) gets used in an exported function.
Own Id: OTP-18916
Related Id(s): PR-7936
*** HIGHLIGHT ***
- New `ets` functions ets:first_lookup/1, ets:next_lookup/2,
ets:prev_lookup/2 and ets:last_lookup/1. Example: ets:next_lookup/1 is
equivalent to ets:next/2 followed by ets:lookup/2 with the next key. The
new combined functions are more efficient and with guaranteed atomicity.
Own Id: OTP-18923
Related Id(s): PR-6791
*** HIGHLIGHT ***
- The `maybe` expression is now enabled by default.
To use `maybe` as an atom, it needs to be single-quoted. Alternatively, the
`maybe` expression can be disabled by disabling the `maybe_expr` feature. That
can be done by placing the following the line at the beginning of an Erlang
source file:
-feature(maybe_expr, disable).
Another way to disable the `maybe_expr` feature is by passing the
`-disable-feature` option to `erlc`:
erlc -disable-feature maybe_expr some_file.erl
Own Id: OTP-18944
Related Id(s): PR-8067
*** HIGHLIGHT ***
- The compiler will now raise a warning when updating record/map literals. As an
example, consider this module:
-module(t).
-export([f/0]).
-record(r, {a,b,c}).
f() ->
#r{a=1}#r{b=2}.
The compiler raises the following warning:
1> c(t).
t.erl:6:12: Warning: expression updates a literal
% 6| #r{a=1}#r{b=2}.
% | ^
Own Id: OTP-18951
Related Id(s): PR-8069
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- Optimized `ets:foldl` and `ets:foldr` to use new `ets:next_lookup`. Also made
them immune against table renaming.
Own Id: OTP-18993
Related Id(s): PR-8048
- Windows now supports all functions in `math`.
Own Id: OTP-19001
Related Id(s): PR-8164
- `m:erl_lint` (and by extension the `compiler`) will now warn for code using
deprecated callbacks.
The only callback currenly deprecated is `format_status/2` in `gen_server`,
`gen_event` and `gen_statem`.
You can use `nowarn_deprecated_callback` to silence the warning.
Own Id: OTP-19010
Related Id(s): PR-8205
- There is a new module `json` for encoding and decoding JSON.
Both encoding and decoding can be customized. Decoding can be done in a
SAX-like fashion and handle multiple documents and streams of data.
Own Id: OTP-19020
Related Id(s): PR-8111
*** HIGHLIGHT ***
> #### Full runtime dependencies of stdlib-6.0
>
> compiler-5.0, crypto-4.5, erts-15.0, kernel-10.0, sasl-3.0
# syntax_tools-3.2
## Fixed Bugs and Malfunctions
- The `epp_dodger` module can now handle the `maybe` and `else` keywords.
Own Id: OTP-18608
Related Id(s): GH-7266, PR-7267
- Reverting a `#wrapper` will no longer throw away changes made to
positions/annotations.
Own Id: OTP-18805
Related Id(s): PR-7398
## Improvements and New Features
- The type erl_syntax:annotation_or_location/0 is now exported.
Own Id: OTP-18715
Related Id(s): PR-7535
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of syntax_tools-3.2
>
> compiler-7.0, erts-9.0, kernel-5.0, stdlib-4.0
# tftp-1.2
## Improvements and New Features
- There is a new `tftp_logger` callback behavior module.
Own Id: OTP-18787
Related Id(s): PR-7700
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of tftp-1.2
>
> erts-6.0, kernel-6.0, stdlib-5.0
# tools-4.0
## Fixed Bugs and Malfunctions
- Dialyzer warnings due to type specs added in `dbg` have been eliminated.
Own Id: OTP-18860
- In Erlang/OTP 26, doing a `cover` analysis on the `line` level would return
multiple entries for lines on which multiple functions were defined.
For example, consider this module:
-module(foo).
-export(bar/0, baz/0).
bar() -> ok. baz() -> not_ok.
In Erlang/OTP 26, analysing on the `line` level would return two entries for
line 4:
1> cover:compile_module(foo).
{ok,foo}
2> foo:bar().
ok
3> cover:analyse(foo, coverage, line).
{ok,{{foo,4},{1,0}},{{foo,4},{0,1}}}
4> cover:analyse(foo, calls, line).
{ok,{{foo,4},1},{{foo,4},0}}
In Erlang/OTP 27, there will only be a single entry for line 4:
1> cover:compile_module(foo).
{ok,foo}
2> foo:bar().
ok
3> cover:analyse(foo, coverage, line).
{ok,{{foo,4},{1,0}}}
4> cover:analyse(foo, calls, line).
{ok,{{foo,4},1}}
Own Id: OTP-18998
Related Id(s): GH-8159, PR-8182
- Fixed align command in emacs mode.
Own Id: OTP-19026
Related Id(s): PR-8155
## Improvements and New Features
- Triple-Quoted Strings has been implemented as per EEP 64. See String in the
Reference Manual.
Example:
1> """
a
b
c
""".
"a\nb\nc"
Adjacent string literals without intervening white space is now a syntax
error, to avoid possible confusion with triple-quoted strings. For example:
1> "abc""xyz".
"xyz".
* 1:6: adjacent string literals without intervening white space
Own Id: OTP-18750
Related Id(s): PR-7313, PR-7451, OTP-18746
*** HIGHLIGHT ***
*** POTENTIAL INCOMPATIBILITY ***
- There is a new tool `tprof`, which combines the functionality of `eprof`
and `cprof` under one interface and adds heap profiling. It also has
functionality to help with profiling process hierarchies.
_Example_:
1> tprof:profile(lists, seq, [1, 16], #{type => call_memory}).
****** Process <0.92.0> -- 100.00% of total ***
FUNCTION CALLS WORDS PER CALL [ %]
lists:seq_loop/3 5 32 6.40 [100.00]
32 [ 100.0]
ok
Own Id: OTP-18756
Related Id(s): PR-6639
*** HIGHLIGHT ***
- Native coverage support has been implemented in the JIT. It will automatically
be used by the `cover` tool to reduce the execution overhead when running
cover-compiled code.
There are also new APIs to support native coverage without using the `cover`
tool.
To instrument code for native coverage it must be compiled with the
`line_coverage` option.
To enable native coverage in the runtime system, start it like so:
$ erl +JPcover true
There are also the following new functions for supporting native coverage:
- code:coverage_support/0
- code:get_coverage/2
- code:reset_coverage/1
- code:get_coverage_mode/0
- code:get_coverage_mode/1
- code:set_coverage_mode/1
Own Id: OTP-18856
Related Id(s): PR-7856
*** HIGHLIGHT ***
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
- Improved the align command in emacs mode.
Own Id: OTP-19080
Related Id(s): PR-8288
> #### Full runtime dependencies of tools-4.0
>
> compiler-8.5, erts-15.0, erts-15.0, kernel-10.0, runtime_tools-2.1, stdlib-6.0
# wx-2.4.2
## Improvements and New Features
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of wx-2.4.2
>
> erts-12.0, kernel-8.0, stdlib-5.0
# xmerl-2.0
## Fixed Bugs and Malfunctions
- Some default values in Xmerl has been changed to avoid XML External Entity
(XXE) vulnerabilities if you're parsing untrusted XML.
xmerl_scan: the default value for allow_entities has changed to false.
xmerl_sax_parser: the default value for external_entities has changed to none.
Own Id: OTP-19079
Related Id(s): GH-7539
*** POTENTIAL INCOMPATIBILITY ***
- An event state in xmerl_sax_parser which was updated in the event callback for
a startEntity was not saved.
Own Id: OTP-19086
Related Id(s): GH-8452
## Improvements and New Features
- Function specifications and types have been added to all public API functions.
Own Id: OTP-18913
- As an alternative to `xmerl_xml`, a new export module `xmerl_xml_indent` that
provides out-of-the box indented output has been added.
Own Id: OTP-18922
Related Id(s): PR-7942
- The documentation has been migrated to use Markdown and ExDoc.
Own Id: OTP-18955
Related Id(s): PR-8026
*** HIGHLIGHT ***
> #### Full runtime dependencies of xmerl-2.0
>
> erts-6.0, kernel-3.0, stdlib-2.5
# Thanks to
Alexander Clouter, Andrea Leopardi, Angelo Lakra, Anshul Mittal (WhatsApp),
Anupama Singh, Artem Solomatin, Benjamin Philip, chiroptical, Christian Flicker,
Fabian N.C. van 't Hooft, Frej Drejhammar, Gilbert, Guilherme Andrade, Gustaw
Lippa, Ildar Khizbulin, Ilya Klyuchnikov, Ivan Sokolov, Jakub Witczak, Jan
Uhlig, jdamanalo, jianhui, João Henrique Ferreira de Freitas, Johannes Christ,
Jonatan Männchen, Jonathan Arnett, José Valim, Jurek Michal-AMJ018,
lexprfuncall, LJZN, Luca Succi, Łukasz Niemier, Marcelino Alberdi Pereira, Maria
Scott, Marko Mindek, Matthew Pope, Maxim Fedorov, Max Nordlund kivra, M-I,
Michael Davis, Michal Jurek, Michal Kuratczyk, Michał Muskała, Nelson Vides,
neo, Nikolay Amiantov, Paul Guyot, Paulo F. Oliveira, Richard Carlsson, Roberto
Aloi, Robin Morisset, Ryota Kinukawa, Sacha, Sergey Yelin, Takeru Ohta, Tomas
Abrahamsson, William Fank Thomé, WLSF, yastanotheruser, zeyun chen, Zeyu Zhang
Erlang/OTP 27.0
This release of Erlang/OTP can be built from source or installed using pre-built packages for your OS or third-party tools (such as kerl or asdf).
docker run -it erlang:27.0
Erlang/OTP 27.0
