Ruby Issue Tracking System

09/10/2026

08:01 PM Ruby Bug #22303 (Closed): EncodingError from interpolating symbol crashes whole process

commit:5831948a66412922e1abafd2c38fd6400e420581
The `intern` instruction has been incorrectly marked true for a long time (3.3 through trunk) and its stack canary check crashes the whole runtime process.
The crash only happens in d... alanwu (Alan Wu)

09/09/2026

09:25 PM Ruby Revision 81048db3 (git): YJIT: ZJIT: For init-time mmap failure, use abort() instead of rb_bug()

It's not a bug to be out of memory. Though, the code did have a separate
bug: perror() can fail to write to stderr and set `errno` which made
the check that followed it questionable. When perror() succeeds it
could clobber `errno` anyway... alanwu (Alan Wu)

09/01/2026

08:47 PM Ruby Revision 18ef46d7 (git): ZJIT: Drop `PartialEq` from `FrameState`

No one was actually doing equality comparison on `FrameState`s and it
was only derived because `FrameState` was in `ParseError::StackUnderflow`.
No one was reading the `FrameState` out of `StackUnderflow` either.
Save some binary size. alanwu (Alan Wu)

03:35 PM Ruby Revision 4f53e5d5 (git): ZJIT: Skip failing `test_specialize_inlined_megamorphic_receiver`

I tried fixing the test for a bit but it's not clear to me what the test
expects. Skip for now; I've pinged the author. alanwu (Alan Wu)

08/20/2026

09:32 PM Ruby Revision ba269a0e (git): ZJIT: Refine "same register" constraint for stp_pre and stp_post

Follow-up to 64b9d2f84ec56278e32fff23e1b6cd20e04f8a9f. The commit removed the
check completely, because the conditions were incorrect, but there are in fact
situations where the instruction is unpredictable, namely when the pre/post
inde... alanwu (Alan Wu)

08/18/2026

09:52 PM Ruby Bug #22123: Ruby::Box + `BUNDLER_SETUP` can evaluate gemspecs before main-box RubyGems initialization

hsbt (Hiroshi SHIBATA) wrote in #note-3:
> https://github.com/ruby/ruby/pull/18219
Backport PR to 4.0 merged. alanwu (Alan Wu)

09:48 PM Ruby Bug #22210: Check if issue #19969 is still reproducible / re-opened in 4.0.x

jeremyevans0 (Jeremy Evans) wrote in #note-3:
> Fixed by commit:388ea3c3cf19380bf47916a4e6babc16886cd8bc
> ...
Backport for 4.0 merged. alanwu (Alan Wu)

09:46 PM Ruby Bug #22217: Segmentation fault when resuming execution with `Coverage.start` and ruby/debug

luke-gru (Luke Gruber) wrote in #note-4:
> [Backport PR](https://github.com/ruby/ruby/pull/18184).
Backport PR merged. alanwu (Alan Wu)

09:26 PM Ruby Bug #22188: addr2line doesn't find symbols when compiled with GCC LTO

Backport PR merged. alanwu (Alan Wu)

09:07 PM Ruby Bug #22237: GC.auto_compact corrupts a String or segfaults from String#tr with dup or gsub

Backport PR was merged https://github.com/ruby/ruby/pull/18290 alanwu (Alan Wu)