- Changes for 27.1:
* crypto: crypto built with --enable-fips will now accept an
OpenSSL 3 lib without fips provider as long as fips mode is not
enabled.
* crypto: Added a warning in the documentation to avoid calling
crypto:start/0 as it does not work for FIPS mode. Use
application:start(crypto) instead.
* crypto: Deprecation of RSA encryption functions has been
reverted, as there still exists legitimate use cases with other
padding modes than PKCS-1.
* crypto: Compiler warnings for some removed functions have been
corrected to point out the correct replacement functions.
* ssh: The SSh daemon started with a TCP port number argument
will now re-try obtaining a listen socket before returning an
error to the user.
* ssh: Robustness has been improved by monitoring the connection
handler process before casting the socket control notification.
* ssl: A race in the kTLS flavour of SSL distribution has been
fixed so that inet_drv.c doesn't read ahead too much data,
which could cause the kTLS encryption to be activated too late
when some encrypted data had already been read into the
inet_drv.c buffer as unencrypted.
* ssl: All TLS-1.3 terminations are now graceful (previous TLS
version terminations already were).
* ssl: It is now possible to use a verification fun of arity 4,
giving the user fun access to both encoded and decoded versions
of the certificate. This is desirable as a workaround for
encoding errors preventing re-encoding from being reliable.
This also saves some work load if the encoded version is
needed.
* ssl: Compiler warnings for some removed functions have been
corrected to point out the correct replacement functions.
* ssl: Include more information in logging of SNI (Server Name
Indication) mismatch error.
* diameter: Function specs for the main API module has been
updated.
* diameter: Man pages are now available for erl, erlc, dialyzer,
and all other programs that are included in Erlang/OTP.
* diameter: diameter:stop_service/1 has been made more
synchronous.
* wx: Documentation has been improved.
* public_key: For completeness handle rsa_pss implicit default
value, although this will probably not be commonly used as it
provides very weak security.
* public_key: The public_key:cacerts_load() function could in
some error cases return undefined instead of {error, Reason}.
* public_key: Added support for DragonFly.
* public_key: Deprecation of RSA encryption functions has been
reverted, as there still exists legitimate use cases with other
padding modes than PKCS-1.
* public_key: It is now possible to use a verification fun of
arity 4, giving the user fun access to both encoded and decoded
versions of the certificate. This is desirable as a workaround
for encoding errors preventing re-encoding from being reliable.
This also saves some work load if the encoded version is
needed.
* snmp: Man pages are now available for erl, erlc, dialyzer, and
all other programs that are included in Erlang/OTP.
* snmp: Figures in the documentation have been improved.
* tftp: The legacy dependency to m:error_logger has been removed.
m:logger is now used.
* ftp: Eliminated a race condition that sometimes resulted in
ftp:recv_bin/2 returning ok instead of {ok, Data}.
* odbc: Figures in the documentation have been improved.
* compiler: Fixed a crash in an optimization pass relating to
appending binaries.
* compiler: Fixed a bug in the compiler's alias analysis pass
that could make it emit unsafe code.
* common_test: Groups with empty list specifying groups and test
cases no longer crash execution.
* common_test: The Common_Test documentation and type specs have
been polished.
* common_test: Man pages are now available for erl, erlc,
dialyzer, and all other programs that are included in
Erlang/OTP.
* dialyzer: Man pages are now available for erl, erlc, dialyzer,
and all other programs that are included in Erlang/OTP.
* xmerl: Corrected export functions from internal structure to
XML so xmlText items of type cdata are handled correctly. They
were just exported as normal text instead of output in a CDATA
section.
* xmerl: The type spec for xmerl_sax_parser:file/2 has been
corrected to indicate that it can return an {error, _} tuple.
* runtime_tools: Fixed a bug where dbg sessions on remote nodes
were terminated prematurely.
* inets: The documentation for the m:httpd module has been
improved, along with correction of headings and types.
* inets: Userinfo is now properly percent-decoded before usage in
headers.
* stdlib: The help printout for incorrect t:io:format/0 strings
now handles the k modifier correctly.
* stdlib: Fixed a bug that caused the shell completion to crash
when keyword and tuple appeared on the same line.
* stdlib: Due to PR-7419/OTP-18671, the cached internal value of
the callback_mode started leaking out to logger reports, which
could cause logger handlers to crash. This has now been fixed
to show the value that was set, as before caching.
* stdlib: Fixed an emulator crash relating to compressed ETS
tables.
* stdlib: The error description for maps:update/3 will no longer
insist that the third argument is not a map when a key could
not be found
* stdlib: Multiple issues have been corrected in the markdown
parser that creates documentation for the shell.
* stdlib: Fixed category for some codepoint ranges in
unicode_util.
* stdlib: Fixed m:argparse to print sub-commands help when
available.
* stdlib: Class annotation to HTML from fenced blocks have been
added.
* stdlib: Added JSON formatting functions for indented output.
* stdlib: Improved illegal pattern error for accidental map
associations.
* stdlib: Progress reports for a dynamically started supervisor
will now be logged at debug level.
* stdlib: The m:zip module has been updated with support for:
* edoc: Broken links in release notes have been mended.
* tools: m:tprof no longer crashes when using
pause/restart/continue when profiling all modules.
* tools: On systems supporting native coverage, calls to m:cover
could hang or crash if cover-compiled module had been reloaded
from outside cover. This has been corrected so that cover now
recovers from the error and and sends a report to the logger
about the failure to retrieve coverage information.
* tools: Figures in the documentation have been improved.
* erts: The erl -man example has been corrected to not consider
values set in ERL_ZFLAGS and stop parsing arguments when a --
is encountered.
* erts: Compiler warnings for Windows I/O back-end have been
silenced.
* erts: Bugs related to return_to trace have been fixed. It did
not work for more than once trace session and it did sometimes
not trigger for exceptions.
* erts: Potential deadlocks while writing a crash dump have been
eliminated.
* erts: When loading a damaged or too old BEAM file, the runtime
system could crash.
* erts: A scheduler thread could get stuck when deleting a memory
allocator carrier when adjacent carriers were deleted and/or
inserted simultaneously by other schedulers. This in turn could
cause the other schedulers to get stuck as well.
* erts: Statistics for number of carriers in a shared pool after
calling instrument:allocations or instrument:carriers are now
correct. Also, a potential bug in carrier block scanning was
eliminated.
* erts: A race in the kTLS flavour of SSL distribution has been
fixed so that inet_drv.c doesn't read ahead too much data,
which could cause the kTLS encryption to be activated too late
when some encrypted data had already been read into the
inet_drv.c buffer as unencrypted.
* erts: Fixed an emulator crash relating to compressed ETS
tables.
* erts: A function (encode_sockaddr) was called with superfluous
argument, on Windows, in the net nif.
* erts: Fixed a crash that could happen on reallocation failure.
* erts: Man pages are now available for erl, erlc, dialyzer, and
all other programs that are included in Erlang/OTP.
* erts: A previous correction in the Erlang/OTP 27.0.1 emergency
patch had the unfortunate side effect of sometimes causing an
unnecessary fullsweep (major) garbage collection instead of a
generation (minor) garbage collection. This has been corrected.
* erts: Fixed trace matchspec functions trace and enable_trace to
use the session tracer when enabling trace flags on untraced
processes.
* erts: Fixed a typo in the type spec for
t:erlang:garbage_collection_defaults/0.
* erts: Corrected socket:ioctl for genaddr (SIOCGENADDR).
* erts: The support for Transparent Huge Pages has been disabled
on non-amd64 Linux systems.
* erts: Fixed a race condition on Windows when upgrading from
-noshell to a shell that would cause Erlang to crash with the
error:
* erts: Added functions getservbyname and getservbyport to the
net module.
* erts: Introduced enet | esock variants of m:inet functions,
either when called with sockets, with explicit inet_backend
config or with the e inet_backend kernel config option.
* erts: Optimize process and port creation when such tracing is
not enabled by any trace session.
* erts: Compiler warnings for some removed functions have been
corrected to point out the correct replacement functions.
* erts: A boolean option read_ahead has been implemented for
gen_tcp, default true, to facilitate not reading past (caching
data) the end of a packet. In particular, for kTLS, caching
data could read in data that was supposed to be decrypted by
the platform's network stack, before crypto parameters could be
activated.
* erts: The m:zip module has been updated with support for:
* kernel: A faulty assertion was corrected in the prim_tty
module. This assertion could trigger when invalid UTF-8 was
read from stdin just as the mode was changed from unicode to
latin1.
* kernel: Opening a disk_log file and combining head_func with
rotate options did not work.
* kernel: Fixed an error info printout for
erlang:is_process_alive/1 on non-local pids.
* kernel: A race in the kTLS flavour of SSL distribution has been
fixed so that inet_drv.c doesn't read ahead too much data,
which could cause the kTLS encryption to be activated too late
when some encrypted data had already been read into the
inet_drv.c buffer as unencrypted.
* kernel: Fixed a deadlock when an application crashes during
startup and log messages were sent to standard out. Logger
would fail to print the messages to standard out and instead
print them to standard error.
* kernel: The -proto_dist init parameter will no longer be
ignored when specified multiple times. It will now log a
warning and use the first specified value.
* kernel: Corrected socket:ioctl for genaddr (SIOCGENADDR).
* kernel: Added functions getservbyname and getservbyport to the
net module.
* kernel: Introduced enet | esock variants of m:inet functions,
either when called with sockets, with explicit inet_backend
config or with the e inet_backend kernel config option.
* kernel: The function socket:i/0 now uses the m:net module
(instead of the m:inet module) for service translation.
* kernel: A boolean option read_ahead has been implemented for
gen_tcp, default true, to facilitate not reading past (caching
data) the end of a packet. In particular, for kTLS, caching
data could read in data that was supposed to be decrypted by
the platform's network stack, before crypto parameters could be
activated.
* syntax_tools: The documentation for syntax_tools has been
polished after the migration to the new documentation system.
* asn1: Fixed a cosmetic but harmless issue with the ASN.1
compiler passing on the undec_rest option to the Erlang
compiler.
- Changes for 27.0.1:
* ssh: With this change, race condition between connection
closing and automatic window adjustment is fixed.
* ssl: Check for TLS-1.3 support should check minimum
requirements.
* ssl: If both TLS-1.3 and TLS-1.2 is supported and TLS-1.2
negotiated convert TLS-1.3 ECDSA schemes to TLS-1.2 hash and
signature pairs for increased interoperability.
* ssl: TLS-1.3 negotiation now uses SNI based options correctly
instead of ignoring them.
* ssl: Make it easier to distinguish between a invalid signature
and unsupported signature.
* ssl: Enhance ALERT logs to help understand what causes the
alert.
* ssl: When the default value for signature_algs is used, default
the signature_algs_cert to the default value + rsa_pkcs1_sha1
to allow this algorithms for certificates but not for the TLS
protocol. This is for better interoperability. If
signature_algs is set explicitly signature_algs_cert must also
be set explicitly if they should be different.
* public_key: Fix bug in dnsName constraint check, could cause
valid cert to be considered bad during path validation.
* compiler: One of the compiler's optimization passes would get
very slow when compiling certain modules. The compiler will now
automatically disable that pass for input that would trigger
the slowdown.
* compiler: Fix +deterministic to work properly with
documentation attributes.
* stdlib: Fix so that missing -doc({file, File}) files only
result in a warning and not an error.
* stdlib: Fixed m:json bugs, json:encode_key_value_list/2 did not
generate arrays and json:decode/3 did not invoke the user
callback for 0.
* edoc: Fix broken makefile dependency when building HTML
documentation.
* erts: In rare circumstances the JIT could do an unsafe in-place
update of a tuple.
* erts: When a port command crashed in the inet driver during
gen_tcp:send/2, a monitor 'DOWN' message could be left
lingering in the caller's mailbox. This has now been fixed.
* erts: 'DOWN' messages originating from a monitored port,
contained the atom process instead of the atom port as the
third element when the exit reason was not an immediate term.
* erts: Fix so that the options to enable Transparent Huge Page
alignment of the Erlang VM executable are only applied to the
Erlang VM and not other native programs such as erlc and
dialyzer. This bug was introduced in Erlang/OTP 27.0.
* erts: When [*no time warp mode*](time_correction.md#no-time-
warp-mode) was enabled, a smaller Erlang monotonic time could
be read than a previously read time, i.e., breaking the
monotonic property. The runtime system will abort when
detecting an issue like this since OTP 24.3.4.17 and OTP 25.0.
* erts: When calling trace:function(Session, _, true, [meta]) the
meta tracer was incorrectly set to be the calling process. Now
it's set to the session tracer as expected.
* kernel: Polish the m:logger documentation.
- Version 27.0:
* Triple-Quoted Strings has been implemented as per EEP 64 to
allow a string to encompass a complete paragraph.
* Adjacent string literals without intervening white space is now
a syntax error, to avoid possible confusion with triple-quoted
strings.
* Sigils on string literals (both ordinary and triple-quoted)
have been implemented as per EEP 66. For example, ~"Björn" or
~b"Björn" are now equivalent to <<"Björn"/utf8>>.
* The compiler will now merge consecutive updates of the same
record.
* 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.
* The maybe expression is now enabled by default, eliminating the
need for enabling the maybe_expr feature.
* 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.
* The compiler will now raise a warning when updating record/map
literals to catch a common mistake. For example, the compiler
will now emit a warning for #r{a=1}#r{b=2}.
* The erl command now supports the -S flag, which is similar to
the -run flag, but with some of the rough edges filed off.
* By default, escripts will now be compiled instead of
interpreted. That means that the compiler application must be
installed.
* The default process limit has been raised to 1048576 processes.
* The erlang:system_monitor/2 functionality is now able to
monitor long message queues in the system.
* 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.
* The pid field has been removed from erlang:fun_info/1,2.
Multiple trace sessions are now supported.
* There is a new module json for encoding and decoding JSON.
* Several new functions that accept funs have been added to module timer.
* The functions is_equal/2, map/2, and filtermap/2 have been
added to the modules sets, ordsets, and gb_sets.
* There are new efficient ets traversal functions with guaranteed
atomicity. For example, ets:next/2 followed by ets:lookup/2 can
now be replaced with ets:next_lookup/1.
* 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.
* binary:replace/3,4 now supports using a fun for supplying the
replacement binary.
* 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 and
observer, and it will be included in crash reports produced by
processes using gen_server, gen_statem, gen_event, and gen_fsm.
* 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.
* common_test: Calls to ct:capture_start/0 and ct:capture_stop/0
are now synchronous to ensure that all output is captured.
* common_test: The default CSS will now include a basic dark mode
handling if it is preferred by the browser.
* crypto: The functions crypto_dyn_iv_init/3 and
crypto_dyn_iv_update/3 that were marked as deprecated in
Erlang/OTP 25 have been removed.
* dialyzer: The --gui option for Dialyzer has been removed.
* ssl: The ssl client can negotiate and handle certificate status
request (OCSP stapling support on the client side).
* tools: There is a new tool tprof, which combines the
functionality of eprof and cprof under one interface. It also
adds heap profiling.
* xmerl: As an alternative to xmerl_xml, a new export module
xmerl_xml_indent that provides out-of-the box indented output
has been added.