Ruby Issue Tracking System

10/21/2026

07:30 PM Ruby Feature #22459: Scoped method-assumption validity tokens (RubyVM.method_token)

Frankly, I don't want to parse through this huge wall of LLM generated prose. Please be mindful of what you're asking readers to do.
Your request boils down to wanting to expose some internal primitive that is used to implement Ruby's m... alanwu (Alan Wu)

10/20/2026

08:48 PM Ruby Revision c21fb62f (git): ZJIT: Add macOS --with-gmp build test for ZJIT test binary

This is so the build failure in <https://github.com/ruby/ruby/pull/19138>
is covered on CI. alanwu (Alan Wu)

10/19/2026

06:29 PM Ruby Bug #22396: Using rb_postponed_job_trigger causes YJIT/ZJIT compiled methods side exits

> To be clear, both stackprof and the datadog profiler avoid this because they still sample the stack inside the signal handler -- the postponed jobs mechanism handles only the recording of the stack (which might e.g. involve expanding m... alanwu (Alan Wu)

10/18/2026

03:07 PM Ruby Bug #22414 (Closed): YJIT: arm64 panic "should not fail when writing to a fresh code page" when the code region fills at a page boundary — please backport 5a7089fc03fb to 3.4

(closing because the branch maintainer looks at closed tickets for backports) alanwu (Alan Wu)

03:02 PM Ruby Bug #22396 (Closed): Using rb_postponed_job_trigger causes YJIT/ZJIT compiled methods side exits

Postponed jobs are overall not great for sample collection because it's biased: C methods can run arbitrarily long without checking interrupts which then frames whatever ruby method afterwards with many samples. We've seen this happen wi... alanwu (Alan Wu)

10/14/2026

08:33 PM Ruby Revision e055c053 (git): ZJIT: Fix snapshot merge race

alanwu (Alan Wu)

10/02/2026

10:59 AM Ruby Feature #22392: Allow refinements to define && and ||

BTW, the cost analysis to non-users is incomplete in the PoC. Quantifying JIT time cost in terms of extra instructions doesn't talk about the optimizations otherwise possible that this inhibits.
The space analysis doesn't talk about all ... alanwu (Alan Wu)

09/30/2026

04:54 PM Ruby Feature #22392: Allow refinements to define && and ||

Please no. Changing non-method call operations to be method calls has disastrous time and space cost for everyone involved, JIT or not. If accepted, this would be yet another case of refinement making people that do not use it pay in ter... alanwu (Alan Wu)

12:05 AM Ruby Revision 95543897 (git): ZJIT: Don't panic when calling RubyVM::ZJIT.reset_stats! with ZJIT off

[Backport #22327] (The rust harness isn't setup for running code without
ZJIT, so the test is in ruby.) alanwu (Alan Wu)

09/29/2026

11:41 PM Ruby Bug #22327 (Closed): RubyVM::ZJIT.reset_stats! aborts the process (Rust panic) when ZJIT is not enabled

Applied in changeset commit:git|b4eb7f249bf9dea7be48abd47a9ad0feac2bfa58.
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ZJIT: Don't panic when calling RubyVM::ZJIT.reset_stats! with ZJIT off
[Bug #22327] (The rust harness isn't setup for running code without
ZJIT, so th... alanwu (Alan Wu)