What's Changed

• Feature #20884: reserve "Ruby" toplevel module for Ruby language - Ruby - Ruby Issue Tracking System
• Bug #20981: rb_undefine_finalizer is missing - Ruby - Ruby Issue Tracking System
• Bug #20982: Inconsistency between Hash#inspect and ENV.inspect in Ruby 3.4 - Ruby - Ruby Issue Tracking System
• Bug #20986: Bug in Prism parser with ?\C - Ruby - Ruby Issue Tracking System
• Bug #20989: Segmentation fault in Ripper when lexing /#{"\xcd"}/ - Ruby - Ruby Issue Tracking System
• Bug #20990: Ripper.tokenize splits "\C-\あ" into tokens with invalid byte sequence - Ruby - Ruby Issue Tracking System
• Bug #20988: String literal that includes \C- \M- with \111 wrongly parsed - Ruby - Ruby Issue Tracking System
• Bug #20992: eval(ascii_encoded_code) raises EncodingError when multibyte local variable exists - Ruby - Ruby Issue Tracking System
• Bug #20995: exception escapes block given to IO.popen("-") in child process - Ruby - Ruby Issue Tracking System
• Remove and stop syncing IRB documentation by st0012 · Pull Request #12416
• Bug #20504: Interpolated string literal in regexp encoding handling - Ruby - Ruby Issue Tracking System
• Bug #21004: Memory leak with new_locations_lambda_body - Ruby - Ruby Issue Tracking System
• Sync IRB to 3e6c12b by st0012 · Pull Request #12486
• [DOC] Tweaks for Hash.new by BurdetteLamar · Pull Request #12503
• Bug #21003: unexpected warning about ignored block - Ruby - Ruby Issue Tracking System
• Bug #21002: Please include license information of turbo_tests - Ruby - Ruby Issue Tracking System
• Launchable: Exit 0 not to stop CI pipeline by ono-max · Pull Request #12449
• Bug #21001: unexpected nil result from proc with ensure and next - Ruby - Ruby Issue Tracking System
• Bug #21006: defined?((receiver).method) raises Stack consistency error - Ruby - Ruby Issue Tracking System
• Bug #21008: Array#sum, Enumerator#sum, Numeric subclass - Ruby - Ruby Issue Tracking System
• Bug #21014: Prism doesn't set node_id on iseqs correctly - Ruby - Ruby Issue Tracking System
• Bug #21011: Constant massign segfaults in parse.y with shareable_constant_value: experimental_everything - Ruby - Ruby Issue Tracking System
• Bug #21017: --with-parser=parse.y configure option does not work - Ruby - Ruby Issue Tracking System
• Bug #21012: Compiling a['a','b'],=1 with parse.y fails - Ruby - Ruby Issue Tracking System
• Bug #20997: YJIT panic assertion left == right failed: leave instruction expects stack size 1, but was: 2 - Ruby - Ruby Issue Tracking System
• [DOC] Show NONE within Measure namespace by havenwood · Pull Request #12274
• Bug #21018: Show invalid command line option more properly - Ruby - Ruby Issue Tracking System
• Feature #6012: Proc#source_location also return the column - Ruby - Ruby Issue Tracking System
• [DOC] Use Hash inspect without hash-rocket in Hash documentation by p8 · Pull Request #12540
• Bug #20489: Ractor behavior strange in ruby master - Ruby - Ruby Issue Tracking System
• Misc #21025: What's the default encoding of String.new? - Ruby - Ruby Issue Tracking System
• Bug #21024: Ruby including generates compilation warning with GCC 15, header is deprecated in C++17, - Ruby - Ruby Issue Tracking System
• Bug #21010: Endless method definition of []= is SyntaxError in parse.y but allowed in Prism - Ruby - Ruby Issue Tracking System
• Bug #21027: not() receiver should be nil - Ruby - Ruby Issue Tracking System
• Bug #21030: Bug: #step with RangeActiveSupport::Duration behavior broken on Ruby 3.4.1 - Ruby - Ruby Issue Tracking System
• Bug #20974: Required and optional anonymous parameter show differently in Proc#parameters - Ruby - Ruby Issue Tracking System
• Bug #20972: OpenSSL Memory Usage - Ruby - Ruby Issue Tracking System
• Bug #20955: Subtle differences with Proc#parameters for anonymous parameters - Ruby - Ruby Issue Tracking System
• Bug #21031: Incompatibility with prism and parse.y when eval'ing unnamed forwarding variables - Ruby - Ruby Issue Tracking System
• Bug #21038: Preserve errno in rb_fiber_scheduler_unblock - Ruby - Ruby Issue Tracking System
• Bug #21044: Prism maximum recursion depth is 1_000, parse.y is 10_000 - Ruby - Ruby Issue Tracking System
• Bug #21043: Prism defined? has slight deviations from parse.y - Ruby - Ruby Issue Tracking System
• Bug #21085: [BUG] Stack consistency error with -ne - Ruby - Ruby Issue Tracking System
• Bug #21048: [Prism] rescue in modifier form with condition behaves differently - Ruby - Ruby Issue Tracking System
• Launchable: Enable PTS observation mode by ono-max · Pull Request #12617
• Prefer uname -n over hostname. by ioquatix · Pull Request #12647
• Add fallback for hostname if uname isn't available. by ioquatix · Pull Request #12655
• Bug #21021: "try to mark T_NONE object" with 3.4.1 - Ruby - Ruby Issue Tracking System
• Launchable: Use Zero Input Subsetting by ono-max · Pull Request #12650
• [DOC] Fix wrong call-seq format by tompng · Pull Request #12662
• Ensure that memory is not freed before calling free_fast_fallback_getaddrinfo_* by shioimm · Pull Request #12661
• Feature #20470: Extract Ruby's Garbage Collector - Ruby - Ruby Issue Tracking System
• Bug #21092: error building ruby 3.4.1 on cygwin/msys2 - Ruby - Ruby Issue Tracking System
• Bug #21099: TestGc#test_gc_stress_at_startup assertion failure - Ruby - Ruby Issue Tracking System
• Feature #19521: Support for Module#name= and Class#name=. - Ruby - Ruby Issue Tracking System
• Bug #21103: Binding problem with delegate methods - Ruby - Ruby Issue Tracking System
• Bug #21106: The last iteration of the rb_ary_shuffle_bang function is useless - Ruby - Ruby Issue Tracking System
• Add sleep to PTY tests to stabilize flaky failures by ono-max · Pull Request #12691
• Bug #21088: TCPSocket.new raises Socket::ResolutionError instead of Errno::ECONNREFUSED for hosts defined in /etc/hosts - Ruby - Ruby Issue Tracking System
• Move out from quarantine a Marshal.dump spec for Float by andrykonchin · Pull Request #12692
• Bug #21112: Typo in error message when an incorrect key is used with WeakKeyMap - Ruby - Ruby Issue Tracking System
• Launchable: Fix broken links by passing GITHUB_SERVER_URL by ono-max · Pull Request #12704
• Simplified to find gemspecs for bundled gems by hsbt · Pull Request #12709
• Launchable: Add a workflow name as a flavor by ono-max · Pull Request #12720
• [DOC] Tweaks for Hash#clear by BurdetteLamar · Pull Request #12727
• [DOC] Tweaks for Hash#assoc by BurdetteLamar · Pull Request #12726
• [DOC] Adds section "Hash Inclusion" by BurdetteLamar · Pull Request #12634
• Feature #21116: Extract RJIT as a third-party gem - Ruby - Ruby Issue Tracking System
• Bug #21114: Prism hangs up while parsing deeply nested def - Ruby - Ruby Issue Tracking System
• Bug #21117: Inconsistent behaviour between "_1" and "it" variables - Ruby - Ruby Issue Tracking System
• Bug #21127: Thread deadlock does not display backtraces - Ruby - Ruby Issue Tracking System
• Bug #21137: Compound assignment operator with "it" parsed differently between parse.y and prism - Ruby - Ruby Issue Tracking System
• [DOC] Tweaks for Hash#[]= by BurdetteLamar · Pull Request #12695
• Bug #21128: dir.c defines O_CLOEXEC before it is defined by the system. - Ruby - Ruby Issue Tracking System
• [DOC] Tweaks for Hash#compact! by BurdetteLamar · Pull Request #12756
• Bug #21145: Prism accepts newlines in-between curly unicode escape - Ruby - Ruby Issue Tracking System
• Bug #20965: it vs binding.local_variables - Ruby - Ruby Issue Tracking System
• Tweak: Add prefix to non-static function names by shioimm · Pull Request #12764
• Launchable: Remove unused file names by ono-max · Pull Request #12782
• Bug #21131: IO.copy_stream: yielded string changes value when duped - Ruby - Ruby Issue Tracking System
• Bug #21144: Win32: Use Windows time zone ID as the time zone name if TZ is not set - Ruby - Ruby Issue Tracking System
• Bug #21150: Segfault in MacOS libunwind (c backtrace info) when called from a ractor - Ruby - Ruby Issue Tracking System
• Bug #21153: ::Foo ||= p 1 should parse - Ruby - Ruby Issue Tracking System
• Bug #17507: Regexp capture groups ignored sometimes in some multithreaded environments (possible race condition) - Ruby - Ruby Issue Tracking System
• Prefer 0.000001 over 0.000001f for timeout calculations. by ioquatix · Pull Request #12803
• Launchable: Fix launchable record session command failures by ono-max · Pull Request #12810
• Bug #21159: Module#set_temporary_name should freeze given name - Ruby - Ruby Issue Tracking System
• [Misc #20661] Stop retrying tests in make test-all command by default by ono-max · Pull Request #11271
• Increase timeout in TestParallel testing to reduce flaky failures by ono-max · Pull Request #12822
• Bug #21161: Crash when locale is set to Turkish tr_TR.UTF-8 - Ruby - Ruby Issue Tracking System
• Increase timeouts in Compilations actions to reduce intermittent failures by ono-max · Pull Request #12827
• Bug #20682: Slave PTY output is lost after a child process exits in macOS - Ruby - Ruby Issue Tracking System
• Bug #21165: 引数なしで起動するとSegmentatino Fault - Ruby - Ruby Issue Tracking System
• Allow YJIT mem-size and call-threshold to be set at runtime via YJIT.enable() by annichai-stripe · Pull Request #12505
• Bug #21172: Race condition in register_fstring - Ruby - Ruby Issue Tracking System
• Bug #21170: Corrupted Hash (bad VALUE and missing entry) when -1 returned from .hash - Ruby - Ruby Issue Tracking System
• Fix flaky failure in TestSetTraceFunc#test_tracepoint_disable by ono-max · Pull Request #12854
• Launchable: Send stdout and stderr by ono-max · Pull Request #12785
• YJIT: Rename get_temp_regs2() back to get_temp_regs() by k0kubun · Pull Request #12866
• Bug #21173: RUBY_FREE_AT_EXIT does not work when error in -r - Ruby - Ruby Issue Tracking System
• Bug #21163: Inconsistencies in Kernel.Float compared to other number parsing methods - Ruby - Ruby Issue Tracking System
• Bug #21174: Range#max called with an argument on a beginless Integer Range raises RangeError - Ruby - Ruby Issue Tracking System
• [DOC] Tweaks for Hash#merge by BurdetteLamar · Pull Request #12825
• Bug #21179: Introduction Happy Eyeballs Version 2 broke Socket.tcp from secondary Ractors - Ruby - Ruby Issue Tracking System
• [DOC] Tweaks for Hash#reject by BurdetteLamar · Pull Request #12876
• Bug #21177: Sometimes Ruby can create and delete long paths on Windows, but cannot traverse them - Ruby - Ruby Issue Tracking System
• [DOC] Tweaks for Hash#select by BurdetteLamar · Pull Request #12903
• [DOC] Tweaks for Hash#select! by BurdetteLamar · Pull Request #12904
• Launchable: Disable request retries when a timeout exception occurs by ono-max · Pull Request #12877
• Bug #19841: Marshal.dump stack overflow with recursive Time - Ruby - Ruby Issue Tracking System
• Bug #21180: SEGV while marking imemo_env->iseq - Ruby - Ruby Issue Tracking System
• Feature #20971: Deprecate rb_path_check - Ruby - Ruby Issue Tracking System
• [DOC] Tweaks for Hash#to_h by BurdetteLamar · Pull Request #12918
• Bug #21141: Time#utc? does not work with a timezone object - Ruby - Ruby Issue Tracking System
• Bug #21185: Range#overlap? is not commutative with doubly-unbounded range argument. - Ruby - Ruby Issue Tracking System
• Avoid pinning storage_head in iseq_mark_and_move by eileencodes · Pull Request #12880
• Bug #21186: Inconsistent parsing of ?あand 0 - Ruby - Ruby Issue Tracking System
• Allow arguments to be passed through Binding#irb by QWYNG · Pull Request #12796
• Feature #20702: Add Array#fetch_values - Ruby - Ruby Issue Tracking System
• Feature #19908: Update to Unicode 15.1 - Ruby - Ruby Issue Tracking System
• Bug #21094: Module#set_temporary_name does not affect a name of a nested module - Ruby - Ruby Issue Tracking System
• Bug #21029: Prism behavior for defined? (;x) differs - Ruby - Ruby Issue Tracking System
• Bug #21026: def __FILE__.a; end should be a syntax error - Ruby - Ruby Issue Tracking System
• Bug #21193: Inherited callback returns nil for Object.const_source_location - Ruby - Ruby Issue Tracking System
• Bug #20934: UnboundMethod#bind_call may cause "double free or corruption" with Ractor - Ruby - Ruby Issue Tracking System
• Bug #21196: Ruby 3.4 ignores visibility when passing arguments using ... - Ruby - Ruby Issue Tracking System
• Fix test - wording changed. by ioquatix · Pull Request #12963
• Bug #21195: Crash when using IO#timeout - Ruby - Ruby Issue Tracking System
• Add test for RbConfig Ractor safety by mohamedhafez · Pull Request #11762
• Launchable: Fix CI scripts by adding backslashes by ono-max · Pull Request #12974
• [DOC] Doc for Hash#transform_keys! by BurdetteLamar · Pull Request #12942
• Bug #19372: Proc objects are not traversed for shareable check during Ractor.make_shareable(prok) - Ruby - Ruby Issue Tracking System
• Skip TestThreadInstrumentation#test_sleeping_inside_ractor on ModGC w… by ono-max · Pull Request #12996
• Feature #21109: Want to clarify how $/ is handled in Ractor - Ruby - Ruby Issue Tracking System
• Feature #21047: Change *nil to not call nil.to_a, for consistency with **nil - Ruby - Ruby Issue Tracking System
• Feature #20757: Make rb_tracearg_(parameters|eval_script|instruction_sequence) public C-API - Ruby - Ruby Issue Tracking System
• Bug #21202: Ripper wrongly concats separate tstring_content within nested unterminated heredoc - Ruby - Ruby Issue Tracking System
• Bug #21197: Prism does not accept newline after defined? keyword - Ruby - Ruby Issue Tracking System
• Bug #17506: Ractor isolation broken by ThreadGroup - Ruby - Ruby Issue Tracking System
• Bug #20271: Issue with moving embedded string across ractors - Ruby - Ruby Issue Tracking System
• [DOC] Tweaks for docs about contributing by BurdetteLamar · Pull Request #13012
• Bug #21203: TestGc#test_gc_parameter_init_slots is flaky results - Ruby - Ruby Issue Tracking System
• Bug #21211: Incomplete Backtrace for Socket Errors in Ruby 3.4+ - Ruby - Ruby Issue Tracking System
• Fix the if condition to skip test_ractor.rb correctly by ono-max · Pull Request #13067
• Bug #21217: Integer.sqrt produces wrong results even on input <= 1e18 - Ruby - Ruby Issue Tracking System
• Bug #21214: VmRSS consumption increase in Ruby 3.4.2 vs Ruby 3.3.6 - Ruby - Ruby Issue Tracking System
• Fix lldb debug scripts by eileencodes · Pull Request #13048
• Bug #21220: Memory corruption in update_line_coverage() [write at index -1] - Ruby - Ruby Issue Tracking System
• Fix typos finised -> finished by haruna-tsujita · Pull Request #13104
• Feature #20877: Introduce (public) debug assertion for holding the GVL. - Ruby - Ruby Issue Tracking System
• Introduce enum rb_io_mode. by ioquatix · Pull Request #7894
• Bug #21152: Enumerator's #size returned by Range#reverse_each raises an exception for endless Range - Ruby - Ruby Issue Tracking System
• Prefer th->ec for stack base/size. by ioquatix · Pull Request #13101
• Only test on known good platforms. by ioquatix · Pull Request #13123

Note: This list is automatically generated by tool/gen-github-release.rb. Because of this, some commits may be missing.

Full Changelog

v3_4_0...v3_5_0_preview1