March 2026 - ruby-core - ml.ruby-lang.org

[ruby-core:121627] [Ruby Feature#21264] Extract Date library from Ruby repo in the future
by hsbt (Hiroshi SHIBATA) 20 Aug '26

20 Aug '26

Issue #21264 has been reported by hsbt (Hiroshi SHIBATA). ---------------------------------------- Feature #21264: Extract Date library from Ruby repo in the future https://bugs.ruby-lang.org/issues/21264 * Author: hsbt (Hiroshi SHIBATA) * Status: Open ---------------------------------------- Note: This is not for Ruby 3.5. `Date` and `DateTime` has no primary maintainer in 10+ years. I would like to deprecate `date` via bundled gems for reducing our maintenance time especially @nobu. But `Time.prase` and `Time.strptime` are widely used now. How do we deprecate `date` library? 1. Migrate `Date._strptime`, `Date.strptime` and `Date._parse` to `Time`. The current `Date` is migrated as bundled gems. 2. Migrate `Date` to the bundled gems. `Time.parse` and `Time.strptime` warns if `date` is not found. 3. Keep the current situation 4. ... Does anyone have another idea? -- https://bugs.ruby-lang.org/

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[ruby-core:116370] [Ruby master Bug#20203] `TestEnumerable` test failures with GCC 14
by vo.x (Vit Ondruch) 17 Aug '26

17 Aug '26

Issue #20203 has been reported by vo.x (Vit Ondruch). ---------------------------------------- Bug #20203: `TestEnumerable` test failures with GCC 14 https://bugs.ruby-lang.org/issues/20203 * Author: vo.x (Vit Ondruch) * Status: Open * Priority: Normal * ruby -v: ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [x86_64-linux] * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- There is ongoing mass rebuild in Fedora and that is first time GCC 14 is used and we observe test failures in `TestEnumerable`. Here are a few examples: ~~~ [ 3000/26419] TestEnumerable#test_transient_heap_sort_bymalloc_consolidate(): unaligned fastbin chunk detected ~~~ ~~~ [ 2455/26535] TestEnumerable#test_transient_heap_sort_bycorrupted size vs. prev_size in fastbins ~~~ ~~~ [ 9716/26532] TestEnumerable#test_any_with_unused_blockdouble free or corruption (fasttop) ~~~ The full logs are accessible [here](https://koji.fedoraproject.org/koji/taskinfo?taskID=112176941). Please drill through `Descendants` and `build.log` -- https://bugs.ruby-lang.org/

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[ruby-core:117483] [Ruby master Bug#20419] [BUG] inconsistent freelist length with cppflags='-DRGENGC_CHECK_MODE -DUSE_RUBY_DEBUG_LOG=1'
by znz (Kazuhiro NISHIYAMA) 16 Aug '26

16 Aug '26

Issue #20419 has been reported by znz (Kazuhiro NISHIYAMA). ---------------------------------------- Bug #20419: [BUG] inconsistent freelist length with cppflags='-DRGENGC_CHECK_MODE -DUSE_RUBY_DEBUG_LOG=1' https://bugs.ruby-lang.org/issues/20419 * Author: znz (Kazuhiro NISHIYAMA) * Status: Open * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- `TestGc#test_gc_stress_at_startup` failed on my environment, so I check which configure flags affect. How to reproduce: ``` ./configure cppflags='-DRGENGC_CHECK_MODE -DUSE_RUBY_DEBUG_LOG=1' make miniruby env RUBY_DEBUG=gc_stress ./miniruby -v ``` I can't reproduce with `cppflags='-DRGENGC_CHECK_MODE'` or `cppflags='-DUSE_RUBY_DEBUG_LOG=1'`. ---Files-------------------------------- output.txt (9.44 KB) -- https://bugs.ruby-lang.org/

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[ruby-core:116226] [Ruby master Bug#20189] `rb_str_resize` does not clear coderange when expanding
by tompng (tomoya ishida) 16 Aug '26

16 Aug '26

Issue #20189 has been reported by tompng (tomoya ishida). ---------------------------------------- Bug #20189: `rb_str_resize` does not clear coderange when expanding https://bugs.ruby-lang.org/issues/20189 * Author: tompng (tomoya ishida) * Status: Open * Priority: Normal * ruby -v: ruby 3.4.0dev (2024-01-09T07:07:19Z master db476cc71c) [x86_64-linux] * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- Expanding string in some encoding (utf16 utf32) can change coderange to either valid or broken, but rb_str_resize does not clear coderange. This will cause a bug in c-extension libraries that use rb_str_resize. ~~~ruby # Example for stringio s = StringIO.new("\0".encode('UTF-16LE')) s.truncate(1); s.truncate(2); s.string.valid_encoding? #=> true s.truncate(1); s.string.valid_encoding?; s.truncate(2); s.string.valid_encoding? #=> false (expect to be true) ~~~ -- https://bugs.ruby-lang.org/

5 6

[ruby-core:114943] [Ruby master Bug#19910] Set#delete_if behavior inconsistent with Array/Hash
by segiddins (Samuel Giddins) 16 Aug '26

16 Aug '26

Issue #19910 has been reported by segiddins (Samuel Giddins). ---------------------------------------- Bug #19910: Set#delete_if behavior inconsistent with Array/Hash https://bugs.ruby-lang.org/issues/19910 * Author: segiddins (Samuel Giddins) * Status: Open * Priority: Normal * ruby -v: 3.2.2 * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN ---------------------------------------- Given the following script: ```ruby #!/usr/bin/env ruby require 'set' def enum(collection) i = 0 collection.delete_if do i += 1 raise ArgumentError if i == 6 i.odd? end rescue ArgumentError return collection end pp enum([0, 1, 2, 3, 4, 5, 6, 7]) pp enum([0, 1, 2, 3, 4, 5, 6, 7].to_h { [_1, _1] }) pp enum([0, 1, 2, 3, 4, 5, 6, 7].to_set) ``` It results in: ``` [1, 3, 5, 6, 7] {1=>1, 3=>3, 5=>5, 6=>6, 7=>7} #<Set: {0, 1, 2, 3, 4, 5, 6, 7}> ``` As you can see, when an exception is raise inside `delete_if` on Hash/Array, the already-considered elements are still removed from the array. For `Set`, no elements are deleted (due to the implementation that builds up an intermediary list of elements to delete, then removes them from the underlying hash afterwards). It would be very helpful if `Set#delete_if` behaved consistently with other core collection types -- https://bugs.ruby-lang.org/

5 4

[ruby-core:125003] [Ruby Feature#21953] Allow accessing unshareable objects within a Ractor-local Ruby Box
by tikkss (Tsutomu Katsube) 16 Aug '26

16 Aug '26

Issue #21953 has been reported by tikkss (Tsutomu Katsube). ---------------------------------------- Feature #21953: Allow accessing unshareable objects within a Ractor-local Ruby Box https://bugs.ruby-lang.org/issues/21953 * Author: tikkss (Tsutomu Katsube) * Status: Open ---------------------------------------- ### Status Currently, non-main ractors prohibit access to the following objects to prevent data races: * Global variables * Class variables * Unshareable class instance variables * Unshareable constants ### Proposal I would like to propose that allow reading/writing unshareable objects inside a Ruby Box created in a non-main ractor: ```ruby # lib/x.rb class X # can write unshareable objects XXX = "1" @@cvar = "1" @ivar = "1" class << self def cvar; @@cvar; end def ivar; @ivar; end end end # can read unshareable objects $LOAD_PATH # => returns $LOAD_PATH includes lib directory X.cvar # => "1" X.ivar # => "1" X::XXX # => "1" # main.rb Ractor.new do local_box = Ruby::Box.new local_box.eval <<~RUBY base_dir = File.expand_path(File.dirname(__FILE__)) lib_dir = File.join(base_dir, "lib") # can write unshareable objects $LOAD_PATH.unshift(lib_dir) RUBY local_box.require("x") x = local_box::X.new end.join ``` Ruby Box can isolate global/class variables, class/module definitions from other boxes. A Ruby Box created inside a non-main ractor cannot be accessed from other ractor. If that is the case, wouldn’t it be fine to access unshareable objects inside that box? So I would like to propose that allow reading/writing unshareable objects inside a Ruby Box created in a non-main ractor. ### Background We are working on implementing a Ractor based parallel test runner for the test-unit gem. Ractor is a great for parallel processing. However, many existing libraries still rely on class variables or class instance variables for configuration. Ideally, we should reduce the use of class variables or class instance variables. Currently, we tried fixing several non-shareable objects, but we could not resolve all of them yet. We will continue working on this issue, but we are also exploring other approaches. This is the idea begind this proposal. I think the work needed to make objects shareable when running exisiting libraries with Ractor can be reduced. ### FAQ Q: Can we create a Ruby Box inside a non-main ractor? A: Yes: ```ruby Ractor.new {Ruby::Box.new}.join ``` Q: Is a Ruby Box created in a non-main ractor truly inaccessible from other ractor? A: No. I'm not sure if it's intentional, but a Ruby Box is a shareable object. Also, it can be accessed from the main Ractor by using `Ractor#value`: ```ruby Ractor.shareable?(Ruby::Box.new) # => true ``` ```ruby Ractor.new {Ruby::Box.new}.value # => #<Ruby::Box:3,user,optional> ``` To implement this proposal, Ruby Box may need to be an unshareable object, and passing it with `Ractor#value` may need to be disallowed. -- https://bugs.ruby-lang.org/

5 13

[ruby-core:121829] [Ruby Feature#21308] Replacing the Float#to_s (dtoa.c) implementation with a modern algorithm
by watson1978 (Shizuo Fujita) 12 Aug '26

12 Aug '26

Issue #21308 has been reported by watson1978 (Shizuo Fujita). ---------------------------------------- Feature #21308: Replacing the Float#to_s (dtoa.c) implementation with a modern algorithm https://bugs.ruby-lang.org/issues/21308 * Author: watson1978 (Shizuo Fujita) * Status: Open ---------------------------------------- This is a feature request to replace Ruby's `Float#to_s` implementation with a modern high-performance float-to-string conversion algorithm such as Grisu. Currently, `Float#to_s` in Ruby uses the BSD-derived implementation in [missing/dtoa.c](https://github.com/ruby/ruby/blob/master/missing/dtoa.c). Meanwhile, `json` gem has adopted a Grisu-based implementation in [ruby/json#768](https://github.com/ruby/json/pull/768), it has been improve the performance of float-to-string conversion dramatically. It appears to have brought about a 10 times improvement in performance. However, the improvement is limited to the `json` gem. If we can use the same implementation in `Float#to_s`, it will introduce the improvement in all float-to-string conversion cases. (In additional, it would be better if an API could be added that could be called directly from the C extension library, it will reduce the overhead of the call.) -- https://bugs.ruby-lang.org/

3 3

[ruby-core:121988] [Ruby Bug#21324] Namespace loads RubyGems in root Namespace but it should not
by Eregon (Benoit Daloze) 09 Aug '26

09 Aug '26

Issue #21324 has been reported by Eregon (Benoit Daloze). ---------------------------------------- Bug #21324: Namespace loads RubyGems in root Namespace but it should not https://bugs.ruby-lang.org/issues/21324 * Author: Eregon (Benoit Daloze) * Status: Open * ruby -v: ruby 3.5.0dev (2025-05-10T07:50:29Z namespace-on-read-.. bd4f57f96b) +PRISM [x86_64-linux] * Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- RubyGems has tons of mutable state, isn't core library and isn't "builtin classes" either, so it should not be in root Namespace, as it is currently: ``` $ RUBY_NAMESPACE=1 ruby -ve 'ns = Namespace.new; p ns::Gem.equal?(Gem)' ruby 3.5.0dev (2025-05-10T07:50:29Z namespace-on-read-.. bd4f57f96b) +PRISM [x86_64-linux] ruby: warning: Namespace is experimental, and the behavior may change in the future! See doc/namespace.md for know issues, etc. true ``` A concrete example of what breaks most likely due to this: ``` $ gem i delegate:0.3.1 $ RUBY_NAMESPACE=1 ruby -ve 'require "delegate"; p Delegator::VERSION; ns = Namespace.new; File.write "ns.rb", "gem %{delegate}, %{0.3.1}; require :delegate.to_s; p Delegator::VERSION"; ns.require "./ns"' ruby 3.5.0dev (2025-05-10T07:50:29Z namespace-on-read-.. bd4f57f96b) +PRISM [x86_64-linux] ruby: warning: Namespace is experimental, and the behavior may change in the future! See doc/namespace.md for know issues, etc. "0.4.0" /home/eregon/prefix/ruby-master/lib/ruby/3.5.0+0/rubygems/specification.rb:2232:in 'Gem::Specification#check_version_conflict': can't activate delegate-0.3.1, already activated delegate-0.4.0 (Gem::LoadError) from /home/eregon/prefix/ruby-master/lib/ruby/3.5.0+0/rubygems/specification.rb:1383:in 'Gem::Specification#activate' from /home/eregon/prefix/ruby-master/lib/ruby/3.5.0+0/rubygems/core_ext/kernel_gem.rb:62:in 'block in Kernel#gem' from /home/eregon/prefix/ruby-master/lib/ruby/3.5.0+0/rubygems/core_ext/kernel_gem.rb:62:in 'Thread::Mutex#synchronize' from /home/eregon/prefix/ruby-master/lib/ruby/3.5.0+0/rubygems/core_ext/kernel_gem.rb:62:in 'Kernel#gem' from /home/eregon/ns.rb:1:in '<top (required)>' from -e:1:in 'Namespace#require' from -e:1:in '<main>' ``` i.e. `ns` sees delegate-0.4.0 was loaded in main namespace but it shouldn't. Previously mentioned in https://bugs.ruby-lang.org/issues/21311#note-36 -- https://bugs.ruby-lang.org/

5 9

[ruby-core:121478] [Ruby Bug#21206] Segmentation fault on ISeq#to_binary
by shyouhei (Shyouhei Urabe) 09 Aug '26

09 Aug '26

Issue #21206 has been reported by shyouhei (Shyouhei Urabe). ---------------------------------------- Bug #21206: Segmentation fault on ISeq#to_binary https://bugs.ruby-lang.org/issues/21206 * Author: shyouhei (Shyouhei Urabe) * Status: Open * ruby -v: ruby 3.4.2 (2025-02-15 revision d2930f8e7a) +PRISM +GC [aarch64-linux-gnu] * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- Found this SEGV using bootsnap. This could well be architecture dependent because of ISeqs being so by nature. Also this doesn't happen when the ISeq is created using `compile_prism`. ``` $ ruby -ve 'RubyVM::InstructionSequence.compile_parsey("def f(g) = each {nil rescue g+it}").to_binary' ruby 3.4.2 (2025-02-15 revision d2930f8e7a) +PRISM +GC [aarch64-linux-gnu] -e:1: [BUG] Segmentation fault at 0x0000000000000000 ruby 3.4.2 (2025-02-15 revision d2930f8e7a) +PRISM +GC [aarch64-linux-gnu] -- Control frame information ----------------------------------------------- c:0003 p:---- s:0010 e:000009 CFUNC :to_binary c:0002 p:0008 s:0006 e:000005 EVAL -e:1 [FINISH] c:0001 p:0000 s:0003 E:000190 DUMMY [FINISH] -- Ruby level backtrace information ---------------------------------------- -e:1:in '<main>' -e:1:in 'to_binary' -- Threading information --------------------------------------------------- Total ractor count: 1 Ruby thread count for this ractor: 1 -- Machine register context ------------------------------------------------ x0: 0x0000000000000000 x1: 0x0000ffff8a15d0a8 x2: 0x0000000000000000 x3: 0x0000000000000003 x4: 0x0000000000000000 x5: 0x0000ffffa4346b50 x6: 0x0000000000000005 x7: 0x00000000fffffffe x18: 0x000000000116810c x19: 0x0000ffff8a15d0a8 x20: 0x0000000000000000 x21: 0x0000000000000001 x22: 0x0000ffffc0f0d968 x23: 0x0000ffffc0f0d4c0 x24: 0x0000000000000018 x25: 0x0000ffffa3c98530 x26: 0x0000000000000000 x27: 0x0000000000000002 x28: 0x0000ffffc0f0d4e8 x29: 0x0000ffffc0f0d410 sp: 0x0000ffffc0f0d410 fau: 0x0000000000000000 -- C level backtrace information ------------------------------------------- /lib/aarch64-linux-gnu/libruby-3.4.so.3.4(0xffffa3e8ff84) [0xffffa3e8ff84] /lib/aarch64-linux-gnu/libruby-3.4.so.3.4(0xffffa3e95514) [0xffffa3e95514] /lib/aarch64-linux-gnu/libruby-3.4.so.3.4(0xffffa3ce760c) [0xffffa3ce760c] /lib/aarch64-linux-gnu/libruby-3.4.so.3.4(0xffffa3e0de88) [0xffffa3e0de88] linux-vdso.so.1(__kernel_rt_sigreturn+0x0) [0xffffa43447a0] /lib/aarch64-linux-gnu/libruby-3.4.so.3.4(rb_str_cmp+0x24) [0xffffa3e17d94] [0xffffa3980b9c] [0xffffa3980efc] [0xffffa3f418c8] [0xffffa3c98d4c] [0xffffa3da2484] /lib/aarch64-linux-gnu/libruby-3.4.so.3.4(rb_st_foreach+0x44) [0xffffa3e06944] [0xffffa3f213e4] [0xffffa3d46ea4] [0xffffa3e6c92c] [0xffffa3e767a8] [0xffffa3e8cae8] [0xffffa3ce6ac4] /lib/aarch64-linux-gnu/libruby-3.4.so.3.4(ruby_run_node+0x9c) [0xffffa3cebba0] [0xaaaae2be0b30] [0xffffa39684c4] [0xffffa3968598] [0xaaaae2be0bb0] -- Other runtime information ----------------------------------------------- * Loaded script: -e * Loaded features: 0 enumerator.so 1 thread.rb 2 fiber.so 3 rational.so 4 complex.so 5 ruby2_keywords.rb 6 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/enc/encdb.so 7 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/enc/trans/transdb.so 8 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/rbconfig.rb 9 /usr/lib/ruby/3.4.0/rubygems/compatibility.rb 10 /usr/lib/ruby/3.4.0/rubygems/defaults.rb 11 /usr/lib/ruby/3.4.0/rubygems/deprecate.rb 12 /usr/lib/ruby/3.4.0/rubygems/errors.rb 13 /usr/lib/ruby/3.4.0/rubygems/target_rbconfig.rb 14 /usr/lib/ruby/3.4.0/rubygems/unknown_command_spell_checker.rb 15 /usr/lib/ruby/3.4.0/rubygems/exceptions.rb 16 /usr/lib/ruby/3.4.0/rubygems/basic_specification.rb 17 /usr/lib/ruby/3.4.0/rubygems/stub_specification.rb 18 /usr/lib/ruby/3.4.0/rubygems/platform.rb 19 /usr/lib/ruby/3.4.0/rubygems/specification_record.rb 20 /usr/lib/ruby/3.4.0/rubygems/util/list.rb 21 /usr/lib/ruby/3.4.0/rubygems/version.rb 22 /usr/lib/ruby/3.4.0/rubygems/requirement.rb 23 /usr/lib/ruby/3.4.0/rubygems/specification.rb 24 /usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb 25 /usr/lib/ruby/3.4.0/rubygems/util.rb 26 /usr/lib/ruby/3.4.0/rubygems/dependency.rb 27 /usr/lib/ruby/3.4.0/rubygems/core_ext/kernel_gem.rb 28 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/monitor.so 29 /usr/lib/ruby/3.4.0/monitor.rb 30 /usr/lib/ruby/3.4.0/rubygems.rb 31 /usr/lib/ruby/3.4.0/bundled_gems.rb 32 /usr/lib/ruby/3.4.0/rubygems/path_support.rb 33 /usr/lib/ruby/3.4.0/error_highlight/version.rb 34 /usr/lib/ruby/3.4.0/error_highlight/base.rb 35 /usr/lib/ruby/3.4.0/error_highlight/formatter.rb 36 /usr/lib/ruby/3.4.0/error_highlight/core_ext.rb 37 /usr/lib/ruby/3.4.0/error_highlight.rb 38 /usr/lib/ruby/3.4.0/did_you_mean/version.rb 39 /usr/lib/ruby/3.4.0/did_you_mean/core_ext/name_error.rb 40 /usr/lib/ruby/3.4.0/did_you_mean/levenshtein.rb 41 /usr/lib/ruby/3.4.0/did_you_mean/jaro_winkler.rb 42 /usr/lib/ruby/3.4.0/did_you_mean/spell_checker.rb 43 /usr/lib/ruby/3.4.0/did_you_mean/spell_checkers/name_error_checkers/class_name_checker.rb 44 /usr/lib/ruby/3.4.0/did_you_mean/spell_checkers/name_error_checkers/variable_name_checker.rb 45 /usr/lib/ruby/3.4.0/did_you_mean/spell_checkers/name_error_checkers.rb 46 /usr/lib/ruby/3.4.0/did_you_mean/spell_checkers/method_name_checker.rb 47 /usr/lib/ruby/3.4.0/did_you_mean/spell_checkers/key_error_checker.rb 48 /usr/lib/ruby/3.4.0/did_you_mean/spell_checkers/null_checker.rb 49 /usr/lib/ruby/3.4.0/did_you_mean/tree_spell_checker.rb 50 /usr/lib/ruby/3.4.0/did_you_mean/spell_checkers/require_path_checker.rb 51 /usr/lib/ruby/3.4.0/did_you_mean/spell_checkers/pattern_key_name_checker.rb 52 /usr/lib/ruby/3.4.0/did_you_mean/formatter.rb 53 /usr/lib/ruby/3.4.0/did_you_mean.rb 54 /usr/lib/ruby/3.4.0/syntax_suggest/core_ext.rb * Process memory map: aaaae2be0000-aaaae2be1000 r-xp 00000000 00:34 763738 /usr/bin/ruby3.4 aaaae2bff000-aaaae2c00000 r--p 0000f000 00:34 763738 /usr/bin/ruby3.4 aaaae2c00000-aaaae2c01000 rw-p 00010000 00:34 763738 /usr/bin/ruby3.4 aaab18253000-aaab18545000 rw-p 00000000 00:00 0 [heap] ffff87c00000-ffff881f3000 r--s 00000000 00:34 763745 /usr/lib/aarch64-linux-gnu/libruby-3.4.so.3.4.2 ffff88200000-ffff88201000 ---p 00000000 00:00 0 ffff88201000-ffff882a2000 rw-p 00000000 00:00 0 ffff882a2000-ffff882a3000 ---p 00000000 00:00 0 ffff882a3000-ffff88344000 rw-p 00000000 00:00 0 ffff88344000-ffff88345000 ---p 00000000 00:00 0 ffff88345000-ffff883e6000 rw-p 00000000 00:00 0 ffff883e6000-ffff883e7000 ---p 00000000 00:00 0 ffff883e7000-ffff88488000 rw-p 00000000 00:00 0 ffff88488000-ffff88489000 ---p 00000000 00:00 0 ffff88489000-ffff8852a000 rw-p 00000000 00:00 0 ffff8852a000-ffff8852b000 ---p 00000000 00:00 0 ffff8852b000-ffff885cc000 rw-p 00000000 00:00 0 ffff885cc000-ffff885cd000 ---p 00000000 00:00 0 ffff885cd000-ffff8866e000 rw-p 00000000 00:00 0 ffff8866e000-ffff8866f000 ---p 00000000 00:00 0 ffff8866f000-ffff88710000 rw-p 00000000 00:00 0 ffff88710000-ffff88711000 ---p 00000000 00:00 0 ffff88711000-ffff887b2000 rw-p 00000000 00:00 0 ffff887b2000-ffff887b3000 ---p 00000000 00:00 0 ffff887b3000-ffff88854000 rw-p 00000000 00:00 0 ffff88854000-ffff88855000 ---p 00000000 00:00 0 ffff88855000-ffff888f6000 rw-p 00000000 00:00 0 ffff888f6000-ffff888f7000 ---p 00000000 00:00 0 ffff888f7000-ffff88998000 rw-p 00000000 00:00 0 ffff88998000-ffff88999000 ---p 00000000 00:00 0 ffff88999000-ffff88a3a000 rw-p 00000000 00:00 0 ffff88a3a000-ffff88a3b000 ---p 00000000 00:00 0 ffff88a3b000-ffff88adc000 rw-p 00000000 00:00 0 ffff88adc000-ffff88add000 ---p 00000000 00:00 0 ffff88add000-ffff88b7e000 rw-p 00000000 00:00 0 ffff88b7e000-ffff88b7f000 ---p 00000000 00:00 0 ffff88b7f000-ffff88c20000 rw-p 00000000 00:00 0 ffff88c20000-ffff88c21000 ---p 00000000 00:00 0 ffff88c21000-ffff88cc2000 rw-p 00000000 00:00 0 ffff88cc2000-ffff88cc3000 ---p 00000000 00:00 0 ffff88cc3000-ffff88d64000 rw-p 00000000 00:00 0 ffff88d64000-ffff88d65000 ---p 00000000 00:00 0 ffff88d65000-ffff88e06000 rw-p 00000000 00:00 0 ffff88e06000-ffff88e07000 ---p 00000000 00:00 0 ffff88e07000-ffff88ea8000 rw-p 00000000 00:00 0 ffff88ea8000-ffff88ea9000 ---p 00000000 00:00 0 ffff88ea9000-ffff88f4a000 rw-p 00000000 00:00 0 ffff88f4a000-ffff88f4b000 ---p 00000000 00:00 0 ffff88f4b000-ffff88fec000 rw-p 00000000 00:00 0 ffff88fec000-ffff88fed000 ---p 00000000 00:00 0 ffff88fed000-ffff8908e000 rw-p 00000000 00:00 0 ffff8908e000-ffff8908f000 ---p 00000000 00:00 0 ffff8908f000-ffff89130000 rw-p 00000000 00:00 0 ffff89130000-ffff89131000 ---p 00000000 00:00 0 ffff89131000-ffff891d2000 rw-p 00000000 00:00 0 ffff891d2000-ffff891d3000 ---p 00000000 00:00 0 ffff891d3000-ffff89274000 rw-p 00000000 00:00 0 ffff89274000-ffff89275000 ---p 00000000 00:00 0 ffff89275000-ffff89316000 rw-p 00000000 00:00 0 ffff89316000-ffff89317000 ---p 00000000 00:00 0 ffff89317000-ffff893b8000 rw-p 00000000 00:00 0 ffff893b8000-ffff893b9000 ---p 00000000 00:00 0 ffff893b9000-ffff8945a000 rw-p 00000000 00:00 0 ffff8945a000-ffff8945b000 ---p 00000000 00:00 0 ffff8945b000-ffff894fc000 rw-p 00000000 00:00 0 ffff894fc000-ffff894fd000 ---p 00000000 00:00 0 ffff894fd000-ffff8959e000 rw-p 00000000 00:00 0 ffff8959e000-ffff8959f000 ---p 00000000 00:00 0 ffff8959f000-ffff89640000 rw-p 00000000 00:00 0 ffff89800000-ffff89810000 ---p 00000000 00:00 0 ffff89810000-ffff8a010000 rw-p 00000000 00:00 0 ffff8a0d0000-ffff8a0e0000 rw-p 00000000 00:00 0 ffff8a0ef000-ffff8a120000 rw-p 00000000 00:00 0 ffff8a120000-ffff8a122000 r-xp 00000000 00:34 763838 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/monitor.so ffff8a122000-ffff8a13f000 ---p 00002000 00:34 763838 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/monitor.so ffff8a13f000-ffff8a140000 r--p 0000f000 00:34 763838 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/monitor.so ffff8a140000-ffff8a141000 rw-p 00010000 00:34 763838 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/monitor.so ffff8a150000-ffffa3600000 rw-p 00000000 00:00 0 ffffa3610000-ffffa36d0000 rw-p 00000000 00:00 0 ffffa36d0000-ffffa36d2000 r-xp 00000000 00:34 763811 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/enc/trans/transdb.so ffffa36d2000-ffffa36ef000 ---p 00002000 00:34 763811 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/enc/trans/transdb.so ffffa36ef000-ffffa36f0000 r--p 0000f000 00:34 763811 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/enc/trans/transdb.so ffffa36f0000-ffffa36f1000 rw-p 00010000 00:34 763811 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/enc/trans/transdb.so ffffa3700000-ffffa3710000 rw-p 00000000 00:00 0 ffffa3710000-ffffa3712000 r-xp 00000000 00:34 763767 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/enc/encdb.so ffffa3712000-ffffa372f000 ---p 00002000 00:34 763767 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/enc/encdb.so ffffa372f000-ffffa3730000 r--p 0000f000 00:34 763767 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/enc/encdb.so ffffa3730000-ffffa3731000 rw-p 00010000 00:34 763767 /usr/lib/aarch64-linux-gnu/ruby/3.4.0/enc/encdb.so ffffa3740000-ffffa3790000 rw-p 00000000 00:00 0 ffffa379e000-ffffa3900000 rw-p 00000000 00:00 0 ffffa3900000-ffffa391f000 r-xp 00000000 00:34 566619 /usr/lib/aarch64-linux-gnu/libgcc_s.so.1 ffffa391f000-ffffa392f000 ---p 0001f000 00:34 566619 /usr/lib/aarch64-linux-gnu/libgcc_s.so.1 ffffa392f000-ffffa3930000 r--p 0001f000 00:34 566619 /usr/lib/aarch64-linux-gnu/libgcc_s.so.1 ffffa3930000-ffffa3931000 rw-p 00020000 00:34 566619 /usr/lib/aarch64-linux-gnu/libgcc_s.so.1 ffffa3940000-ffffa3ada000 r-xp 00000000 00:34 770271 /usr/lib/aarch64-linux-gnu/libc.so.6 ffffa3ada000-ffffa3aed000 ---p 0019a000 00:34 770271 /usr/lib/aarch64-linux-gnu/libc.so.6 ffffa3aed000-ffffa3af0000 r--p 0019d000 00:34 770271 /usr/lib/aarch64-linux-gnu/libc.so.6 ffffa3af0000-ffffa3af2000 rw-p 001a0000 00:34 770271 /usr/lib/aarch64-linux-gnu/libc.so.6 ffffa3af2000-ffffa3afe000 rw-p 00000000 00:00 0 ffffa3b00000-ffffa3b85000 r-xp 00000000 00:34 770303 /usr/lib/aarch64-linux-gnu/libm.so.6 ffffa3b85000-ffffa3b9f000 ---p 00085000 00:34 770303 /usr/lib/aarch64-linux-gnu/libm.so.6 ffffa3b9f000-ffffa3ba0000 r--p 0008f000 00:34 770303 /usr/lib/aarch64-linux-gnu/libm.so.6 ffffa3ba0000-ffffa3ba1000 rw-p 00090000 00:34 770303 /usr/lib/aarch64-linux-gnu/libm.so.6 ffffa3bb0000-ffffa3bdd000 r-xp 00000000 00:34 566603 /usr/lib/aarch64-linux-gnu/libcrypt.so.1.1.0 ffffa3bdd000-ffffa3bef000 ---p 0002d000 00:34 566603 /usr/lib/aarch64-linux-gnu/libcrypt.so.1.1.0 ffffa3bef000-ffffa3bf0000 r--p 0002f000 00:34 566603 /usr/lib/aarch64-linux-gnu/libcrypt.so.1.1.0 ffffa3bf0000-ffffa3bf1000 rw-p 00030000 00:34 566603 /usr/lib/aarch64-linux-gnu/libcrypt.so.1.1.0 ffffa3bf1000-ffffa3bf9000 rw-p 00000000 00:00 0 ffffa3c00000-ffffa41cb000 r-xp 00000000 00:34 763745 /usr/lib/aarch64-linux-gnu/libruby-3.4.so.3.4.2 ffffa41cb000-ffffa41d6000 ---p 005cb000 00:34 763745 /usr/lib/aarch64-linux-gnu/libruby-3.4.so.3.4.2 ffffa41d6000-ffffa41f0000 r--p 005d6000 00:34 763745 /usr/lib/aarch64-linux-gnu/libruby-3.4.so.3.4.2 ffffa41f0000-ffffa41f1000 rw-p 005f0000 00:34 763745 /usr/lib/aarch64-linux-gnu/libruby-3.4.so.3.4.2 ffffa41f1000-ffffa4206000 rw-p 00000000 00:00 0 ffffa420f000-ffffa4220000 r--s 00000000 00:34 763738 /usr/bin/ruby3.4 ffffa4220000-ffffa4230000 rw-p 00000000 00:00 0 ffffa4230000-ffffa42aa000 r-xp 00000000 00:34 767074 /usr/lib/aarch64-linux-gnu/libgmp.so.10.5.0 ffffa42aa000-ffffa42bf000 ---p 0007a000 00:34 767074 /usr/lib/aarch64-linux-gnu/libgmp.so.10.5.0 ffffa42bf000-ffffa42c0000 r--p 0007f000 00:34 767074 /usr/lib/aarch64-linux-gnu/libgmp.so.10.5.0 ffffa42c0000-ffffa42c1000 rw-p 00080000 00:34 767074 /usr/lib/aarch64-linux-gnu/libgmp.so.10.5.0 ffffa42d0000-ffffa42ea000 r-xp 00000000 00:34 566707 /usr/lib/aarch64-linux-gnu/libz.so.1.3 ffffa42ea000-ffffa42ff000 ---p 0001a000 00:34 566707 /usr/lib/aarch64-linux-gnu/libz.so.1.3 ffffa42ff000-ffffa4300000 r--p 0001f000 00:34 566707 /usr/lib/aarch64-linux-gnu/libz.so.1.3 ffffa4300000-ffffa4301000 rw-p 00020000 00:34 566707 /usr/lib/aarch64-linux-gnu/libz.so.1.3 ffffa4307000-ffffa432e000 r-xp 00000000 00:34 769991 /usr/lib/aarch64-linux-gnu/ld-linux-aarch64.so.1 ffffa4339000-ffffa433d000 rw-p 00000000 00:00 0 ffffa4340000-ffffa4342000 rw-p 00000000 00:00 0 ffffa4342000-ffffa4344000 r--p 00000000 00:00 0 [vvar] ffffa4344000-ffffa4345000 r-xp 00000000 00:00 0 [vdso] ffffa4345000-ffffa4347000 r--p 0002e000 00:34 769991 /usr/lib/aarch64-linux-gnu/ld-linux-aarch64.so.1 ffffa4347000-ffffa4349000 rw-p 00030000 00:34 769991 /usr/lib/aarch64-linux-gnu/ld-linux-aarch64.so.1 ffffc0eef000-ffffc0f10000 rw-p 00000000 00:00 0 [stack] Segmentation fault ``` -- https://bugs.ruby-lang.org/

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[ruby-core:124579] [Ruby Bug#21842] Encoding of rb_interned_str
by herwin (Herwin W) 09 Aug '26

09 Aug '26

Issue #21842 has been reported by herwin (Herwin W). ---------------------------------------- Bug #21842: Encoding of rb_interned_str https://bugs.ruby-lang.org/issues/21842 * Author: herwin (Herwin W) * Status: Open * Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: UNKNOWN ---------------------------------------- This is one of the API methods to get an fstring. The documentation in the source says the following: ```c /** * Identical to rb_str_new(), except it returns an infamous "f"string. What is * a fstring? Well it is a special subkind of strings that is immutable, * deduped globally, and managed by our GC. It is much like a Symbol (in fact * Symbols are dynamic these days and are backended using fstrings). This * concept has been silently introduced at some point in 2.x era. Since then * it gained wider acceptance in the core. Starting from 3.x extension * libraries can also generate ones. * * @param[in] ptr A memory region of `len` bytes length. * @param[in] len Length of `ptr`, in bytes, not including the * terminating NUL character. * @exception rb_eArgError `len` is negative. * @return A found or created instance of ::rb_cString, of `len` bytes * length, of "binary" encoding, whose contents are identical to * that of `ptr`. * @pre At least `len` bytes of continuous memory region shall be * accessible via `ptr`. */ VALUE rb_interned_str(const char *ptr, long len); ``` I tried to create some specs for them (https://github.com/ruby/spec/pull/1327) but instead of binary encoding, the string is actually encoded as US-ASCII. This may result is some weird behaviour if the input contains bytes that are not valid in US-ASCII (the following is more an observation of the current behaviour) ```ruby it "support binary strings that are invalid in ASCII encoding" do str = "foo\x81bar\x82baz".b result = @s.rb_interned_str(str, str.bytesize) result.encoding.should == Encoding::US_ASCII result.should == str.dup.force_encoding(Encoding::US_ASCII) result.should_not.valid_encoding? end ``` So it seems to me like either the implementation of the documentation is incorrect. (`rb_interned_str_cstr` has the same behaviour, it's pretty much the same thing except using a null terminator instead of an explicit length argument). -- https://bugs.ruby-lang.org/

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