Ruby Issue Tracking System

Today

09:59 AM Ruby Feature #22274: Make `IO::Buffer` no longer experimental.

There have been new methods/classes in the last week like:
`IO::Buffer#advance` https://github.com/ruby/ruby/pull/19122
`Introduce IO::Buffer::Storage and parent-relative slice views` https://github.com/ruby/ruby/pull/19186
I thin... Eregon (Benoit Daloze)

10/08/2026

12:15 PM Ruby Bug #22396: Using rb_postponed_job_trigger causes YJIT/ZJIT compiled methods side exits

I think maybe the bigger issue here is that profiling a program using YJIT or ZJIT might give very misleading results, because the action of profiling itself (if the profiler uses postponed jobs and many do) has the unexpected side effec... Eregon (Benoit Daloze)

12:10 PM Ruby Bug #22396: Using rb_postponed_job_trigger causes YJIT/ZJIT compiled methods side exits

Draft of a potential fix: https://github.com/ruby/ruby/pull/18205
I have tried several things to avoid overhead on the the no-interrupt-path but they mostly failed, I guess the YJIT backend doesn't really support generating code with ... Eregon (Benoit Daloze)

09:59 AM Ruby Feature #22379: Remove prism mismatch warning from `#syntax_tree`

Two more thoughts on this:
1. Should there be a `version:` keyword argument for `Ruby::Prism.parse(code, version:)`? Because the point of Ruby::Prism is to use the current version always. The default is actually `"latest"`, which by c... Eregon (Benoit Daloze)

10/07/2026

10:43 PM Ruby Feature #22379: Remove prism mismatch warning from `#syntax_tree`

Overall I think this is a great solution for making `#syntax_tree` reliable.
I asked Claude to think about the consequences of introducing `Ruby::Prism`:
---
It recreates the `ripper` / `parser` gem split. Code that parses the running... Eregon (Benoit Daloze)

09:12 PM Ruby Feature #22379: Remove prism mismatch warning from `#syntax_tree`

I asked Claude about those questions.
Re the 2 Prism C extensions, it's a non-issue because only `Init_prism` could conflict, and the interpreter resolves its `Init_prism` at link time, and the extension's init is resolved by `dlsym(exte... Eregon (Benoit Daloze)

08:22 PM Ruby Feature #22379: Remove prism mismatch warning from `#syntax_tree`

How does this work for the Prism C extension?
When having both `Ruby::Prism` and `Prism`, there are 2 "Prism C extensions" loaded and both define some C globals like `Init_prism` (EDIT: I originally wrote `rb_cPrism` but that's actually ... Eregon (Benoit Daloze)

10/06/2026

08:34 PM Ruby Feature #22376: Undefine the allocator for Class

+1, this definitely helps avoid many subtle bugs and simplifies the logic significantly (in fact I already advocated for this in previous tickets). Eregon (Benoit Daloze)

10/04/2026

06:34 PM Ruby Revision d5ef1ede (git): [ruby/prism] Use #source_range when available for Prism.find

* This is more accurate than using the line and is a portable API between Ruby implementations.
* I also tried to use #syntax_tree but that fails 2 tests as it returns the CallNode instead of BlockNode for blocks.
Additionally, #syntax... Eregon (Benoit Daloze)

09/24/2026

08:19 AM Ruby Revision cc32a303 (git): [ruby/error_highlight] Use Thread::Backtrace::Location#syntax_tree when available

https://github.com/ruby/error_highlight/commit/7755b9bff1 Eregon (Benoit Daloze)