Erlang/OTP 26.1

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:26.1

Highlights #

OTP-18746
Application(s):
stdlib
Related Id(s):
PR-7313 , PR-7456

*** POTENTIAL INCOMPATIBILITY ***

A warning for (accidental use of) Triple-Quoted Strings has been implemented as per EEP 64.

Potential Incompatibilities #

OTP-18696
Application(s):
stdlib

Pattern matching and equivalence (=:=, =/=) comparisons on 0.0 will now raise a warning, as it will no longer be considered equivalent to -0.0 in OTP 27.

If a match on 0.0 specifically is desired (distinct from -0.0), the warning can be suppressed by writing +0.0 instead.

The arithmetic comparison operators are unaffected, including arithmetic equality (==).

OTP-18746
Application(s):
stdlib
Related Id(s):
PR-7313 , PR-7456

*** HIGHLIGHT ***

A warning for (accidental use of) Triple-Quoted Strings has been implemented as per EEP 64.

asn1-5.2 #

The asn1-5.2 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18729
Application(s):
asn1
Related Id(s):
PR-7575

The ASN.1 compiler would ignore a constraint such as (SIZE (1..4), ...), causing incorrect behavior of the encoding and decoding function for the PER and UPER backends. Corrected to handle the constraint in the same way as (SIZE (1..4, ...)).

OTP-18748
Application(s):
asn1
Related Id(s):
ERIERL-957 , PR-7637

The JER backend has been internally refactored in a way that is compatible for applications that use the documented API. However, for a group of ASN.1 modules that depend on each other (for example, S1AP-PDU-Descriptions, S1AP-Contents, and so on), all modules in the group must be recompiled if on of the group members is recompiled.

Full runtime dependencies of asn1-5.2: erts-11.0, kernel-7.0, stdlib-3.13

common_test-1.25.1 #

The common_test-1.25.1 application can be applied independently of other applications on a full OTP 26 installation.

OTP-14480
Application(s):
common_test
Related Id(s):
ERIERL-43 , OTP-11894 , PR-7455

With this change, ct_hooks manual refers to CTH execution order section in user guide.

OTP-18579
Application(s):
common_test
Related Id(s):
GH-7119

With this change, Config data from pre_end_per_testcase hook is delivered to post_end_per_testcase callback in case of testcase timetrap or linked process crash.

OTP-18615
Application(s):
common_test
Related Id(s):
PR-7234

With this change, remaining references to not supported vts tool in ct_run are removed (mainly relates to docs and ct_run help message).

OTP-18664
Application(s):
common_test
Related Id(s):
ERIERL-959

With this change, prompt search functionality in ct_telnet handles unicode input.

OTP-18676
Application(s):
common_test, erl_docgen, erts, kernel, stdlib
Related Id(s):
GH-7459 , PR-7473

Expanded the documentation about how to use the standard_io, standard_error and user I/O devices.

Added the types io:standard_io/0, io:standard:error/0 and io:user/0.

Full runtime dependencies of common_test-1.25.1: 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-8.4 #

The compiler-8.4 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18605
Application(s):
compiler, stdlib
Related Id(s):
GH-7298 , GH-7317

The compiler could run forever when compiling a call to is_record/3 with a huge positive tuple size. The call is_record(A, a, 0) would crash the compiler when used in a function body. When used in a guard the compiler would emit incorrect code that would accept {a> as a record.

OTP-18629
Application(s):
compiler, dialyzer
Related Id(s):
GH-7325

Fixed a bug that caused dialyzer to crash when analyzing bogus code that contained the literal atom undefined in segment sizes.

OTP-18662
Application(s):
compiler
Related Id(s):
GH-7409 , PR-7416

The compiler would crash when compiling some modules that contained a call to erlang:load_nif/2.

OTP-18678
Application(s):
compiler
Related Id(s):
GH-7488

Fixed a bug that caused the compiler to crash on legal code.

OTP-18689
Application(s):
compiler
Related Id(s):
GH-7504 , PR-7518

The compiler could crash when attempting to compile a call to is_list/1 in a complex expression.

OTP-18692
Application(s):
compiler
Related Id(s):
GH-7517 , PR-7519

A complex guard expression using the or operator could succeed when it was supposed to fail.

OTP-18701
Application(s):
compiler
Related Id(s):
GH-7477 , PR-7532

Compiling nested try/catch and catch expression could result in an internal compiler error.

OTP-18719
Application(s):
compiler
Related Id(s):
GH-7468 , PR-7562

Using the bnot operator in a complex expression could cause the compiler to terminate with an internal consistency failure diagnostic.

OTP-18721
Application(s):
compiler
Related Id(s):
PR-7527

Fixed a bug that caused the compiler to crash in a binary optimization pass.

OTP-18725
Application(s):
compiler
Related Id(s):
GH-7467

The compiler could terminate with an internal error when attempting to compile a binary pattern that could not possibly match.

OTP-18691
Application(s):
compiler
Related Id(s):
PR-7448

Fixed various performance issues related to the alias optimization pass.

Full runtime dependencies of compiler-8.4: crypto-5.1, erts-13.0, kernel-8.4, stdlib-5.0

crypto-5.3 #

The crypto-5.3 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18670
Application(s):
crypto
Related Id(s):
GH-7436 , PR-7450

Fix VM crash caused by crypto being purged and reloaded (by init:restart for example) on OS with musl libc (such as Alpine linux).

OTP-18758
Application(s):
crypto
Related Id(s):
PR-7209

Improved understanding of LibreSSL versions. Support chacha20 and chacha20_poly1305 for LibreSSL 3.7. Reflect removal of support for the DSS/DSA algorithm which was done in LibreSSL 2.6.1.

OTP-18666
Application(s):
crypto
Related Id(s):
PR-7392

FIPS supported by crypto for OpenSSL 3.0.* and 3.1.*.

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

debugger-5.3.2 #

The debugger-5.3.2 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18644
Application(s):
debugger
Related Id(s):
GH-7336

The call int:no_break(Module) did not remove any breakpoints.

OTP-18740
Application(s):
debugger
Related Id(s):
GH-7410 , PR-7599

The maybe expression is now supported in the Debugger.

Full runtime dependencies of debugger-5.3.2: compiler-8.0, erts-12.0, kernel-8.0, stdlib-3.15, wx-2.0

dialyzer-5.1.1 #

The dialyzer-5.1.1 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18629
Application(s):
compiler, dialyzer
Related Id(s):
GH-7325

Fixed a bug that caused dialyzer to crash when analyzing bogus code that contained the literal atom undefined in segment sizes.

OTP-18738
Application(s):
dialyzer
Related Id(s):
GH-7584

Dialyzer could crash when attempting to analyze a module that defined a type called product/.

Full runtime dependencies of dialyzer-5.1.1: compiler-8.0, erts-12.0, kernel-8.0, stdlib-5.0, syntax_tools-2.0, wx-2.0

erl_docgen-1.5.1 #

The erl_docgen-1.5.1 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18676
Application(s):
common_test, erl_docgen, erts, kernel, stdlib
Related Id(s):
GH-7459 , PR-7473

Expanded the documentation about how to use the standard_io, standard_error and user I/O devices.

Added the types io:standard_io/0, io:standard:error/0 and io:user/0.

Full runtime dependencies of erl_docgen-1.5.1: edoc-1.0, erts-11.0, kernel-8.0, stdlib-3.15, xmerl-1.3.7

erts-14.1 #

The erts-14.1 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18592
Application(s):
erts

maps:put with existing key and identical value was not optimized as a no-op correctly if having the same 32-bit hash as another key in the map. In practice very rare and harmless.

OTP-18623
Application(s):
erts, kernel
Related Id(s):
GH-7344

Fixed an issue with truncated crash slogans on failed emulator start.

OTP-18645
Application(s):
erts
Related Id(s):
GH-7401

Fixed a bug where the emulator was unable to determine the current cgroup CPU quota.

OTP-18647
Application(s):
erts
Related Id(s):
PR-7595

A process optimized for parallel signal delivery could under some circumstances lose wakeup information. That is, the processes was not woken up to take care of the signal, so the signal would not be taken care of until the process was woken by another signal. Only processes configured with message_queue_data set to off_heap utilize this optimization.

OTP-18669
Application(s):
erts, kernel
Related Id(s):
OTP-18029

Function socket:close/1 could cause a VM crash on Windows.

OTP-18672
Application(s):
erts
Related Id(s):
GH-7469

Fixed a bug in the ARM JIT where it could accidentally add garbage trailing bits when creating bitstrings whose size wasn't an even multiple of 8 bits.

OTP-18674
Application(s):
erts
Related Id(s):
PR-7472

Fix erlang:system_info/1 documentation to show correct types.

OTP-18676
Application(s):
common_test, erl_docgen, erts, kernel, stdlib
Related Id(s):
GH-7459 , PR-7473

Expanded the documentation about how to use the standard_io, standard_error and user I/O devices.

Added the types io:standard_io/0, io:standard:error/0 and io:user/0.

OTP-18702
Application(s):
erts
Related Id(s):
GH-7381

Fix compilation with GNU termcap.

OTP-18706
Application(s):
erts
Related Id(s):
ERIERL-979 , GH-7413 , PR-7595

Delivery time of message signals to a process not executing any receive expressions could become very long, potentially infinite. For example, a process checking for messages using process_info(self(), message_queue_len) or process_info(self(), messages) and avoiding to execute a receive expression matching on messages could be very slow in detecting new messages. Note that you are still discouraged from using process_info() this way. A process that wants to check if there are messages available to handle should execute a receive expression matching on messages.

OTP-18724
Application(s):
erts
Related Id(s):
GH-7566 , PR-7567

On AArch64 (ARM64), when calculating both the quotient and remainder with a divisor begin a power two, the remainder could be incorrectly calculated.

OTP-18732
Application(s):
erts
Related Id(s):
GH-7444 , PR-7458

Fix bug causing "magic" references in a compressed ETS table to not keep the referred object alive. The symptom would be the referred object being garbage collected prematurely and the reference appearing stale, not referring to anything. Examples of such magically referred objects are atomics and NIF resources.

OTP-18733
Application(s):
erts
Related Id(s):
GH-7292

Matching out short bitstrings with a fixed size not divisible by 8 could could lead to the runtime system terminating with an "Overrun heap and stack" error.

OTP-18737
Application(s):
erts
Related Id(s):
PR-7595

A constant flow of incoming non-message signals could prevent a process needing to execute dirty from doing so.

OTP-18745
Application(s):
erts
Related Id(s):
GH-7492 , PR-7616

A BEAM file usually contains a chunk with the tag "Type" containing type information that can be used by the JIT. The beam_lib:strip/1 takes care to preserve that chunk, but a build/release tool that does customized stripping could accidentally remove the chunk. Loading a BEAM file without the "Type" chunk could cause incorrect behavior of the loaded code.

OTP-18747
Application(s):
erts, kernel
Related Id(s):
GH-7605

gen_udp:recv/* for Unix Domain Socket in binary mode and passive mode has been fixed to not crash.

OTP-18752
Application(s):
erts
Related Id(s):
PR-7633

The cleanup operation of not yet delivered signals to a terminated process yielded excessively.

OTP-18753
Application(s):
erts
Related Id(s):
PR-7634

Fixed minor hashing issue with the local option of term_to_binary()/term_to_iovec().

OTP-18586
Application(s):
erts, kernel
Related Id(s):
OTP-18029

Update gen_tcp_socket and gen_udp_socket to handle 'completion' (socket on Windows).

OTP-18611
Application(s):
erts, kernel
Related Id(s):
#5024 , OTP-18029

Add support for Unix Domain Sockets (only for STREAM sockets) on Windows for 'socket'.

OTP-18638
Application(s):
erts

In Erlang/OTP 27, by default escripts will be compiled before being executed. That means that the compiler application must be installed. It is possible to force the escript to be interpreted by adding the directive -mode(interpret). to the escript file.

In Erlang/OTP 28, support for interpreting an escript will be removed.

OTP-18660
Application(s):
erts, kernel

Add basic support for socket ioctl on Windows.

OTP-18661
Application(s):
erts
Related Id(s):
PR-6112

Removed erts/etc/darwin/Info.plist, as it is no longer necessary after macos 10.12

OTP-18686
Application(s):
erts, kernel

Add support for (Windows) socket option exclusiveaddruse.

OTP-18687
Application(s):
erts, kernel

[socket] Add support for the 'nopush' option.

OTP-18693
Application(s):
erts, kernel

Add support for socket option 'BSP STATE'.

OTP-18698
Application(s):
erts, kernel

Add tcp socket options 'keepcnt', 'keepidle' and 'keepintvl'.

OTP-18710
Application(s):
erts, kernel

Add support for misc (Windows) socket options ('max_msg_size' and 'maxdg').

Full runtime dependencies of erts-14.1: kernel-9.0, sasl-3.3, stdlib-4.1

inets-9.0.2 #

The inets-9.0.2 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18582
Application(s):
inets
Related Id(s):
GH-6074 , PR-6892

With this change, re_write httpd works as expected and does not return error.

OTP-18688
Application(s):
inets
Related Id(s):
ERIERL-962

Fixed a bug so httpd does not crash when stopped at the wrong time during TLS connection negotiation, or any other theoretically as slow connection setup.

OTP-18694
Application(s):
inets
Related Id(s):
GH-7482

Enhance error handling and avoid that the HTTP client hangs on headers provided on the wrong format.

OTP-18704
Application(s):
inets
Related Id(s):
ERIERL-962 , OTP-18688 , PR-7513

With this change, error report generated by httpd during connection setup contains socket type information.

OTP-18708
Application(s):
inets
Related Id(s):
ERIERL-962 , OTP-18688

Stop and restart of the httpd server in the Inets application has been refactored to a more synchronous and OTP supervisor friendly approach.

This should increase stability and for example avoid a supervisor report from httpd_connection_sup about killed child process(es) in some cases when stopping or restarting httpd.

Full runtime dependencies of inets-9.0.2: 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-5.0

kernel-9.1 #

The kernel-9.1 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18623
Application(s):
erts, kernel
Related Id(s):
GH-7344

Fixed an issue with truncated crash slogans on failed emulator start.

OTP-18628
Application(s):
kernel
Related Id(s):
GH-7280

Fix shell:start_interactive function specification.

OTP-18654
Application(s):
kernel
Related Id(s):
PR-7404

Fix code:get_doc/1 to return missing, when it can't find erts instead of crashing.

OTP-18669
Application(s):
erts, kernel
Related Id(s):
OTP-18029

Function socket:close/1 could cause a VM crash on Windows.

OTP-18675
Application(s):
kernel, stdlib
Related Id(s):
GH-7459 , PR-7473

Fix deadlock when erl.exe is used as part of a pipe on Windows and trying to set the encoding of the standard_io device.

OTP-18676
Application(s):
common_test, erl_docgen, erts, kernel, stdlib
Related Id(s):
GH-7459 , PR-7473

Expanded the documentation about how to use the standard_io, standard_error and user I/O devices.

Added the types io:standard_io/0, io:standard:error/0 and io:user/0.

OTP-18677
Application(s):
kernel
Related Id(s):
GH-7417 , PR-7418

Fix logger's overload protection mechanism to only fetch memory used by messages when needed.

OTP-18685
Application(s):
kernel

Fixed a number of socket-related issues causing incompatibilities with gen_tcp and gen_udp respectively.

OTP-18707
Application(s):
kernel
Related Id(s):
#7530

gen_tcp:connect with socket address and socket (inet-) backend fails because of missing callback function.

OTP-18731
Application(s):
kernel
Related Id(s):
GH-7577 , PR-7578

The DNS RR cache used by `inet_res` has been fixed to preserve insert order, which is beneficial when the DNS server returns RRs in some specific order for e.g load balancing purposes.

OTP-18734
Application(s):
kernel
Related Id(s):
GH-6461 , GH-7569 , OTP-18344 , PR-6522

The options `reuseport`, `reuseport_lb` and `exclusiveaddruse` were accidentally not allowed for e.g `gen_udp:open/1,2`, which has now been corrected.

OTP-18747
Application(s):
erts, kernel
Related Id(s):
GH-7605

gen_udp:recv/* for Unix Domain Socket in binary mode and passive mode has been fixed to not crash.

OTP-18757
Application(s):
kernel
Related Id(s):
PR-7631

Fixed issue where cursor would not be placed at the end of the expression when navigating shell history.

OTP-18586
Application(s):
erts, kernel
Related Id(s):
OTP-18029

Update gen_tcp_socket and gen_udp_socket to handle 'completion' (socket on Windows).

OTP-18611
Application(s):
erts, kernel
Related Id(s):
#5024 , OTP-18029

Add support for Unix Domain Sockets (only for STREAM sockets) on Windows for 'socket'.

OTP-18660
Application(s):
erts, kernel

Add basic support for socket ioctl on Windows.

OTP-18681
Application(s):
kernel

The file:location/0 type is now exported.

OTP-18686
Application(s):
erts, kernel

Add support for (Windows) socket option exclusiveaddruse.

OTP-18687
Application(s):
erts, kernel

[socket] Add support for the 'nopush' option.

OTP-18693
Application(s):
erts, kernel

Add support for socket option 'BSP STATE'.

OTP-18698
Application(s):
erts, kernel

Add tcp socket options 'keepcnt', 'keepidle' and 'keepintvl'.

OTP-18710
Application(s):
erts, kernel

Add support for misc (Windows) socket options ('max_msg_size' and 'maxdg').

OTP-18754
Application(s):
kernel, stdlib
Related Id(s):
PR-7604 , PR-7647

The keyboard shortcuts for the shell are now configurable.

OTP-18755
Application(s):
kernel
Related Id(s):
PR-7503

Optimized code_server to reduce repeated work when loading the same module concurrently.

Full runtime dependencies of kernel-9.1: crypto-5.0, erts-14.0, sasl-3.0, stdlib-5.0

megaco-4.5 #

The megaco-4.5 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18599
Application(s):
megaco
Related Id(s):
OTP-18029

Make megaco transports handle gen_tcp | gen_udp with socket backend on Windows (completion).

Full runtime dependencies of megaco-4.5: asn1-3.0, debugger-4.0, erts-12.0, et-1.5, kernel-8.0, runtime_tools-1.8.14, stdlib-2.5

mnesia-4.22.1 #

The mnesia-4.22.1 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18711
Application(s):
mnesia
Related Id(s):
ERIERL-963

Do not delete old backup file if the new backup fails.

Full runtime dependencies of mnesia-4.22.1: erts-9.0, kernel-5.3, stdlib-5.0

observer-2.15.1 #

The observer-2.15.1 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18722
Application(s):
observer
Related Id(s):
PR-7462

Closing the trace log window via the menu did not work.

Full runtime dependencies of observer-2.15.1: erts-14.0, et-1.5, kernel-9.0, runtime_tools-1.19, stdlib-5.0, wx-2.3

public_key-1.14.1 #

The public_key-1.14.1 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18718
Application(s):
public_key
Related Id(s):
GH-7546

Country name comparison shall be case insensitive

OTP-18723
Application(s):
public_key
Related Id(s):
GH-6394

Add check to disallow duplicate certs in a path

Full runtime dependencies of public_key-1.14.1: asn1-3.0, crypto-4.6, erts-6.0, kernel-3.0, stdlib-3.5

snmp-5.15 #

The snmp-5.15 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18598
Application(s):
snmp
Related Id(s):
OTP-18029

Make snmp handle gen_udp with socket backend on Windows (completion).

Full runtime dependencies of snmp-5.15: crypto-4.6, erts-12.0, kernel-8.0, mnesia-4.12, runtime_tools-1.8.14, stdlib-5.0

ssl-11.0.3 #

The ssl-11.0.3 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18697
Application(s):
ssl
Related Id(s):
GH-7506

Avoid function clause error in ssl:getopts/2 by handling that inet:getopts may return an empty list during some circumstances, such as the socket being in a closing state.

OTP-18700
Application(s):
ssl
Related Id(s):
GH-7507

The API function `ssl:recv/3` has been tightened to disallow negative length, which has never been documented to work, but was passed through and caused strange errors.

OTP-18712
Application(s):
ssl
Related Id(s):
GH-7431

When a client initiated renegotiation was rejected and the client socket was in active mode the expected error message to the controlling process was not sent.

OTP-18631
Application(s):
ssl

Add some guidance for signature algorithms configuration in ssl applications users guide.

Full runtime dependencies of ssl-11.0.3: crypto-5.0, erts-14.0, inets-5.10.7, kernel-9.0, public_key-1.11.3, runtime_tools-1.15.1, stdlib-4.1

stdlib-5.1 #

The stdlib-5.1 application can be applied independently of other applications on a full OTP 26 installation.

OTP-18605
Application(s):
compiler, stdlib
Related Id(s):
GH-7298 , GH-7317

The compiler could run forever when compiling a call to is_record/3 with a huge positive tuple size. The call is_record(A, a, 0) would crash the compiler when used in a function body. When used in a guard the compiler would emit incorrect code that would accept {a> as a record.

OTP-18614
Application(s):
stdlib
Related Id(s):
GH-7162 , PR-7237

Fix bug in ets:tab2file that could make it fail if another Erlang process created the same file at the same time.

OTP-18616
Application(s):
stdlib
Related Id(s):
GH-7258

An {else_clause,Value} exception will now be reported nicely in the shell.

OTP-18627
Application(s):
stdlib
Related Id(s):
PR-7072

Correct return value for error case, so that it matches the documented and intended return value {error, {already_started, pid()} when local registered names are used.

OTP-18633
Application(s):
stdlib

sys:get_state/1,2 and sys:replace_state/2,3 has been corrected to handle a state named error as a state name, not as a failed system callback.

For the standard server behaviours this was an issue only for gen_statem (and gen_fsm) when the state name was error, and for gen_server if the complete state was {error,_}.

OTP-18655
Application(s):
stdlib
Related Id(s):
GH-6460 , PR-7208

Multiple problems were fixed in filelib:safe_relative_path/2. If its second argument was a path that contained symbolic links, an incorrect result patch could be returned. Also, paths were sometimes falsely considered unsafe.

OTP-18675
Application(s):
kernel, stdlib
Related Id(s):
GH-7459 , PR-7473

Fix deadlock when erl.exe is used as part of a pipe on Windows and trying to set the encoding of the standard_io device.

OTP-18676
Application(s):
common_test, erl_docgen, erts, kernel, stdlib
Related Id(s):
GH-7459 , PR-7473

Expanded the documentation about how to use the standard_io, standard_error and user I/O devices.

Added the types io:standard_io/0, io:standard:error/0 and io:user/0.

OTP-18683
Application(s):
stdlib
Related Id(s):
PR-7502

Fix h/2,3 to properly render multi-clause documentation.

OTP-18759
Application(s):
stdlib
Related Id(s):
GH-7606

Timers created by timer:apply_after/4, apply_interval/4, and apply_repeatedly/4 would silently fail to do the apply if it was not possible to spawn a process when the timer expired. This has now been corrected, and if the spawn fails, the system will be taken down producing a crash dump.

OTP-18763
Application(s):
stdlib
Related Id(s):
GH-7655

When an Erlang source file lacked a module definition, there would be a spurious "module name must not be empty" diagnostic for each spec in the file.

OTP-18679
Application(s):
stdlib
Related Id(s):
ERIERL-965

The argument descriptions for option types in argparse have been made less ambiguous.

OTP-18690
Application(s):
stdlib
Related Id(s):
GH-7510 , PR-7511

Clarified the documentation of normal shutdown reason on gen_server:call/2,3

OTP-18696
Application(s):
stdlib

*** POTENTIAL INCOMPATIBILITY ***

Pattern matching and equivalence (=:=, =/=) comparisons on 0.0 will now raise a warning, as it will no longer be considered equivalent to -0.0 in OTP 27.

If a match on 0.0 specifically is desired (distinct from -0.0), the warning can be suppressed by writing +0.0 instead.

The arithmetic comparison operators are unaffected, including arithmetic equality (==).

OTP-18705
Application(s):
stdlib
Related Id(s):
GH-6339 , GH-7524 , OTP-18471 , PR-6843

The semantics of the gen_{server,statem,event} behaviour's synchronous start behaviour introduced in OTP-26.0 with OTP-18471, has been clarified in the documentation.

OTP-18736
Application(s):
stdlib
Related Id(s):
PR-7564

Added functionality to set a custom multiline prompt.

OTP-18746
Application(s):
stdlib
Related Id(s):
PR-7313 , PR-7456

*** HIGHLIGHT ***

*** POTENTIAL INCOMPATIBILITY ***

A warning for (accidental use of) Triple-Quoted Strings has been implemented as per EEP 64.

OTP-18754
Application(s):
kernel, stdlib
Related Id(s):
PR-7604 , PR-7647

The keyboard shortcuts for the shell are now configurable.

Full runtime dependencies of stdlib-5.1: compiler-5.0, crypto-4.5, erts-13.1, kernel-9.0, sasl-3.0