What's Changed

• Bug #21340: Bump autoconf version to properly handle C23 bool/stdbool defines - Ruby - Ruby Issue Tracking System
• Sync lockfile from rubygems/rubygems by deivid-rodriguez · Pull Request #13472
• Bug #21438: use-after-free when resizing exivars - Ruby - Ruby Issue Tracking System
• Ensure that memory is not freed before callingfree_fast_fallback_getaddrinfo_* by shioimm · Pull Request #12661
• Fixheap-use-after-free infree_fast_fallback_getaddrinfo_entry by shioimm · Pull Request #13231
• Bug #21441: SEGV during thread cleanup if profiler calls thread_profiles_frames at wrong time - Ruby - Ruby Issue Tracking System
• Bug #21255: Can't build Ruby with Windows SDK 10.0.26100 - Ruby - Ruby Issue Tracking System
• Backport GH-13617 for s390x by hsbt · Pull Request #13757
• Bump up resolv-0.6.2 for Ruby 3.4 by hsbt · Pull Request #13818
• Bug #21197: Prism does not accept newline after defined? keyword - Ruby - Ruby Issue Tracking System
• Bug #21333: heap-use-after-free caused by rehash during update - Ruby - Ruby Issue Tracking System
• Bug #21357: Crash in Hash#merge! with ruby-dev in rubocop-rspec test suite - Ruby - Ruby Issue Tracking System
• Bug #21383: Prism leaks memory with invalid yield - Ruby - Ruby Issue Tracking System
• Bug #21394: Memory leak in Prism's RubyVM::InstructionSequence.new - Ruby - Ruby Issue Tracking System
• Bug #21099: TestGc#test_gc_stress_at_startup assertion failure - Ruby - Ruby Issue Tracking System
• Bug #21395: Please backport caa6ba1a46afa1bc696adc5fe91ee992f9570c89 - Ruby - Ruby Issue Tracking System
• Bug #21439: Crash with PM_SPLAT_NODE compiler error (Prism) - Ruby - Ruby Issue Tracking System
• Bug #21354: Symbol#to_proc is not ractor safe - Ruby - Ruby Issue Tracking System
• Bug #20009: Marshal.load raises exception when load dumped class include non-ASCII - Ruby - Ruby Issue Tracking System
• Bug #21380: Use-After-Free in String#split with In-Block String Modification - Ruby - Ruby Issue Tracking System
• Bug #21447: Fix handling of PM_CONSTANT_PATH_NODE node in keyword arguments with ARGS_SPLAT - Ruby - Ruby Issue Tracking System
• Bug #21448: Random.urandom may fail to fall back to reading /dev/urandom on Linux < 3.17 - Ruby - Ruby Issue Tracking System
• Bug #21440: Cannot create instances of frozen Data subclasses - Ruby - Ruby Issue Tracking System
• Bug #21437: Date#hash may return different values for equal dates with large years - Ruby - Ruby Issue Tracking System
• Bug #21497: building issue when using gcc15, because C23 is default - Ruby - Ruby Issue Tracking System
• Bug #21500: Backport gcc 15 support - Ruby - Ruby Issue Tracking System

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

Full Changelog

v3_4_4...v3_4_5

What's Changed

• YJIT: Split the block on optimized getlocal/setlocal by k0kubun · Pull Request #13331
• Bug #21257: YJIT can generate infinite loop when OOM - Ruby - Ruby Issue Tracking System
• Bug #21286: Windows - MSYS2 just updated to GCC 15.1.0, builds failing - Ruby - Ruby Issue Tracking System
• Bug #21327: Windows builds seem broken after clock_gettime changes? - Ruby - Ruby Issue Tracking System
• Bug #21331: heap-use-after-free caused by rehash during transform_values! - Ruby - Ruby Issue Tracking System
• Bug #21289: Fix C level backtraces for USE_ELF - Ruby - Ruby Issue Tracking System

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

Full Changelog

v3_4_3...v3_4_4

What's Changed

• Bug #21145: Prism accepts newlines in-between curly unicode escape - Ruby - Ruby Issue Tracking System
• Bug #21153: ::Foo ||= p 1 should parse - Ruby - Ruby Issue Tracking System
• Bug #21030: Bug: #step withRange<ActiveSupport::Duration> behavior broken on Ruby 3.4.1 - Ruby - Ruby Issue Tracking System
• Bug #21131: IO.copy_stream: yielded string changes value when duped - Ruby - Ruby Issue Tracking System
• Feature #19521: Support forModule#name= andClass#name=. - Ruby - Ruby Issue Tracking System
• Bug #21159:Module#set_temporary_name should freeze given name - Ruby - Ruby Issue Tracking System
• Bug #21161: Crash when locale is set to Turkish tr_TR.UTF-8 - 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 #21170: Corrupted Hash (bad VALUE and missing entry) when -1 returned from .hash - Ruby - Ruby Issue Tracking System
• Bug #21172: Race condition inregister_fstring - Ruby - Ruby Issue Tracking System
• Bug #21163: Inconsistencies in Kernel.Float compared to other number parsing methods - Ruby - Ruby Issue Tracking System
• Bug #21173: RUBY_FREE_AT_EXIT does not work when error in -r - Ruby - Ruby Issue Tracking System
• Bug #21179: Introduction Happy Eyeballs Version 2 brokeSocket.tcp from secondary Ractors - Ruby - Ruby Issue Tracking System
• Bug #19841: Marshal.dump stack overflow with recursive Time - Ruby - Ruby Issue Tracking System
• Bug #21180: SEGV while markingimemo_env->iseq - Ruby - Ruby Issue Tracking System
• Bug #21186: Inconsistent parsing of ?あand 0 - 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 #21195: Crash when using IO#timeout - Ruby - Ruby Issue Tracking System
• Bug #21196: Ruby 3.4 ignores visibility when passing arguments using... - Ruby - Ruby Issue Tracking System
• Bug #21141:Time#utc? does not work with a timezone object - Ruby - Ruby Issue Tracking System
• Bug #21211: Incomplete Backtrace for Socket Errors in Ruby 3.4+ - Ruby - Ruby Issue Tracking System
• Bug #21197: Prism does not accept newline after defined? keyword - Ruby - Ruby Issue Tracking System
• Bug #21183: Ractor error with Prism::VERSION - Ruby - Ruby Issue Tracking System
• Bug #21217: Integer.sqrt produces wrong results even on input <= 1e18 - Ruby - Ruby Issue Tracking System
• Bug #21220: Memory corruption in update_line_coverage() [write at index -1] - Ruby - Ruby Issue Tracking System

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

Full Changelog

v3_4_2...v3_4_3

What's Changed

• Bump net-imap to 0.4.19 for Ruby 3.3 (CVE-2025-25186) by nevans · Pull Request #12732
• Bug #21170: Corrupted Hash (bad VALUE and missing entry) when -1 returned from .hash - Ruby - Ruby Issue Tracking System
• Bug #20951: Confusing handling of timezone object's#utc_to_local results - Ruby - Ruby Issue Tracking System
• Bug #21046: Backport: TLS fix for ARM64 - Ruby - Ruby Issue Tracking System
• Bug #21032:Module#autoload? is slow when$LOAD_PATH contains a relative path - Ruby - Ruby Issue Tracking System
• Bug #21095: Preferuname -n overhostname in tests. - Ruby - Ruby Issue Tracking System
• Bug #21112: Typo in error message when an incorrect key is used with WeakKeyMap - Ruby - Ruby Issue Tracking System
• Bug #21092: error building ruby 3.4.1 on cygwin/msys2 - Ruby - Ruby Issue Tracking System
• Bug #21159:Module#set_temporary_name should freeze given name - Ruby - Ruby Issue Tracking System
• Bug #21172: Race condition inregister_fstring - 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 #21180: SEGV while markingimemo_env->iseq - Ruby - Ruby Issue Tracking System
• Bug #21131: IO.copy_stream: yielded string changes value when duped - Ruby - Ruby Issue Tracking System
• Bug #19841: Marshal.dump stack overflow with recursive Time - Ruby - Ruby Issue Tracking System
• Bug #21186: Inconsistent parsing of ?あand 0 - 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 #21195: Crash when using IO#timeout - Ruby - Ruby Issue Tracking System
• Bug #20984: ENV.inspect is not encoding aware - Ruby - Ruby Issue Tracking System
• Bug #21027:not() receiver should benil - Ruby - Ruby Issue Tracking System
• Bug #21217: Integer.sqrt produces wrong results even on input <= 1e18 - Ruby - Ruby Issue Tracking System
• Bug #21141:Time#utc? does not work with a timezone object - Ruby - Ruby Issue Tracking System

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

Full Changelog

v3_3_7...v3_3_8

Security fixes

• CVE-2025-27219, CVE-2025-27220 and CVE-2025-27221

What's Changed

• Bug #21092: error building ruby 3.4.1 on cygwin/msys2 - Ruby - Ruby Issue Tracking System
• Bug #21170: Corrupted Hash (bad VALUE and missing entry) when -1 returned from .hash - 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 #18257: rb_mRubyVMFrozenCore is broken by GC run - Ruby - Ruby Issue Tracking System
• Bug #21032:Module#autoload? is slow when$LOAD_PATH contains a relative path - Ruby - Ruby Issue Tracking System
• Bug #21131: IO.copy_stream: yielded string changes value when duped - Ruby - Ruby Issue Tracking System
• Bug #19584: Crash in rb_gc_register_address - Ruby - Ruby Issue Tracking System
• Bug #21180: SEGV while markingimemo_env->iseq - Ruby - Ruby Issue Tracking System
• Bug #20025: Parsing identifiers/constants is case-folding dependent - Ruby - Ruby Issue Tracking System
• Bug #19426: EndlessRange#step of object with#succ method does not work - Ruby - Ruby Issue Tracking System

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

Full Changelog

v3_2_7...v3_2_8

Security fixes

• CVE-2025-27219, CVE-2025-27220 and CVE-2025-27221
• Update REXML-3.3.4 and rss-0.3.1 as bundled gems

What's Changed

• Bug #20516: The version of rexml in ruby 3.3.2 has not been updated since 3.2.6. - Ruby - Ruby Issue Tracking System
• Improve base time of assert_linear_performance by tompng · Pull Request #11369

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

Full Changelog

v3_1_6...v3_1_7

What's Changed

• Bug #21024: Ruby including generates compilation warning with GCC 15, header is deprecated in C++17,
• Bug #21021: "try to mark T_NONE object" with 3.4.1
• Bug #20997: YJIT panic assertionleft == right failed: leave instruction expects stack size 1, but was: 2
• Bug #20981: rb_undefine_finalizer is missing
• Bug #20989: Segmentation fault in Ripper when lexing/#{"\xcd"}/
• Bug #21003: unexpected warning about ignored block
• Bug #21002: Please include license information of turbo_tests
• Bug #21001: unexpected nil result from proc with ensure and next
• Bug #21010: Endless method definition of[]= is SyntaxError in parse.y but allowed in Prism
• Bug #20992:eval(ascii_encoded_code) raises EncodingError when multibyte local variable exists
• Bug #21017:--with-parser=parse.y configure option does not work
• Bug #21014: Prism doesn't set node_id on iseqs correctly
• Bug #21027:not() receiver should benil
• Bug #20995: exception escapes block given to IO.popen("-") in child process
• Bug #21008: Array#sum, Enumerator#sum, Numeric subclass
• Bug #21044: Prism maximum recursion depth is 1_000, parse.y is 10_000
• Bug #21031: Incompatibility with prism and parse.y when eval'ing unnamed forwarding variables
• Bug #21085: [BUG] Stack consistency error with -ne
• Bug #21048: [Prism] rescue in modifier form with condition behaves differently
• Bug #21046: Backport: TLS fix for ARM64
• Bug #21012: Compilinga['a','b'],=1 with parse.y fails
• Bug #21038: Preserveerrno inrb_fiber_scheduler_unblock
• Bug #21032:Module#autoload? is slow when$LOAD_PATH contains a relative path
• Bug #21092: error building ruby 3.4.1 on cygwin/msys2
• Bug #21095: Preferuname -n overhostname in tests.
• Bug #21103: Binding problem with delegate methods
• Bug #21088: TCPSocket.new raises Socket::ResolutionError instead of Errno::ECONNREFUSED for hosts defined in /etc/hosts
• Bug #21112: Typo in error message when an incorrect key is used with WeakKeyMap
• Bug #21117: Inconsistent behaviour between "_1" and "it" variables
• Bug #21114: Prism hangs up while parsing deeply nesteddef
• Bug #20984: ENV.inspect is not encoding aware
• Bug #20982: Inconsistency between Hash#inspect and ENV.inspect in Ruby 3.4

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

Full Changelog

v3_4_1...v3_4_2

What's Changed

• Bug #20853: Hash key retrieval after Process.warmup
• Bug #20868: Method#hash changes after compaction
• Bug #20883: sprintf with binary strings has incorrect coderange
• Bug #20873:printf("%f") returns wrong result forRational withFIXNUM_MIN
• Bug #20898: Backport https://github.com/ruby/ruby/pull/9737 to Ruby 3.3 and 3.2
• Bug #20871: Including methods in Enumerable doesn't make them available in Array
• Bug #20907: Fiber scheduler does not correctly re-lock mutex ifMutex#sleep is interrupted.
• Bug #20909: Backport String indexing bug fixes
• Bug #20921: Use-after-free in constant cache
• Bug #20915: Segfault withTracePoint#parameters and aliased C method
• Bug #20447: Ruby 3.3.1 broken on i686 due to "incompatible pointer type" error
• Bug #20924: IO#readline ignores the limit argument when the encoding is UTF-32LE and the limit would split a character
• Bug #20984: ENV.inspect is not encoding aware
• Bug #20995: exception escapes block given to IO.popen("-") in child process
• Bug #21008: Array#sum, Enumerator#sum, Numeric subclass
• Bug #21012: Compilinga['a','b'],=1 with parse.y fails
• Bug #21038: Preserveerrno inrb_fiber_scheduler_unblock
• Bug #20997: YJIT panic assertionleft == right failed: leave instruction expects stack size 1, but was: 2

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

Full Changelog

v3_2_6...v3_2_7

What's Changed

• Bug #20883: sprintf with binary strings has incorrect coderange
• Bug #20886: Crash due to double free on regex timeout after stack allocations
• Bug #20892:ObjectSpace.dump can produce broken JSON for classes with temporary names
• [Backport 3.3] wasm: align fiber stack pointer to 16 bytes by kateinoigakukun · Pull Request #12101
• Bug #20787: IO#readline does not check its arguments like IO#gets and will read more data than limit
• Bug #20868: Method#hash changes after compaction
• Bug #20873:printf("%f") returns wrong result forRational withFIXNUM_MIN
• Bug #20907: Fiber scheduler does not correctly re-lock mutex ifMutex#sleep is interrupted.
• Bug #20871: Including methods in Enumerable doesn't make them available in Array
• Bug #20909: Backport String indexing bug fixes
• Bug #20915: Segfault withTracePoint#parameters and aliased C method
• Bug #20921: Use-after-free in constant cache
• Bug #20924: IO#readline ignores the limit argument when the encoding is UTF-32LE and the limit would split a character
• Bug #20950: Use-after-free in ep in Proc#dup for ifunc procs
• Bug #21012: Compilinga['a','b'],=1 with parse.y fails
• Bug #20984: ENV.inspect is not encoding aware
• Bug #20995: exception escapes block given to IO.popen("-") in child process
• Bug #21008: Array#sum, Enumerator#sum, Numeric subclass
• Bug #21038: Preserveerrno inrb_fiber_scheduler_unblock
• Bug #20997: YJIT panic assertionleft == right failed: leave instruction expects stack size 1, but was: 2

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

Full Changelog

v3_3_6...v3_3_7

What's Changed

This version only changed version number ofRuby 3.4.0.

Full Changelog

v3_4_0...v3_4_1