Ruby Issue Tracking System

04/10/2026

07:56 AM Ruby Feature #21987: Assume `chdir(2)` isn't called and cache `rb_dir_getwd_ospath()`

byroot (Jean Boussier) wrote:
> For some implementations, allocating a `T_DATA` to avoid leaks in case of failure.
Is this still the case? I removed some of this in https://github.com/ruby/ruby/commit/126b657bd103a1abf4b572ade557ffdc... jhawthorn (John Hawthorn)

12:39 AM Ruby Revision 4c2ae6e2 (git): Always ensure room in rb_obj_embedded_size

Although the issue only occurred on debug builds, we should always be
requesting a size large enough to fit the object when it expands to the
heap, rather than just hoping the GC provides enough room. jhawthorn (John Hawthorn)

04/09/2026

08:55 PM Ruby Revision 0b5862f4 (git): Don't use fixed-size hashes for cdhash

This caused out of bounds writes because of converting to a st_table.
Co-authored-by: Luke Gruber <luke.gru@gmail.com>
Co-authored-by: Matt Valentine-House <matt@eightbitraptor.com> jhawthorn (John Hawthorn)

08:55 PM Ruby Revision 8aa2322b (git): Add slot size assertion to ar_force_convert_table

Co-authored-by: Luke Gruber <luke.gru@gmail.com>
Co-authored-by: Matt Valentine-House <matt@eightbitraptor.com> jhawthorn (John Hawthorn)

04/06/2026

10:36 PM Ruby Revision 20211460 (git): Use RB_BUILTIN_TYPE in RCLASS_SINGLETON_P

This should avoid us emitting the check for a special constant. jhawthorn (John Hawthorn)

10:36 PM Ruby Revision a2a69b42 (git): Add assertion to rb_class_alloc

We should only ever call rb_class_alloc with a T_CLASS. Adding this
assert/assumption allows us to elide later checks for T_CLASS> jhawthorn (John Hawthorn)

10:33 PM Ruby Revision 3e851ea7 (git): Avoid box st_lookup in rb_class_real

jhawthorn (John Hawthorn)

04/03/2026

12:36 AM Ruby Feature #21981 (Open): Remove CREF rewriting for methods on cloned classes/modules

When a class or module is cloned, Ruby currently rewrites the CREF chain of each copied method so that it points at the new class instead of the original. I don't think this should happen, and methods on a cloned class should retain thei... jhawthorn (John Hawthorn)

04/02/2026

07:26 PM Ruby Revision 7aa3cbb0 (git): Convert K&R function definitions in configure.ac

jhawthorn (John Hawthorn)

04:13 AM Ruby Bug #20948 (Closed): Constant references incorrectly cached in `module (expr)::Foo`

Applied in changeset commit:git|91ae69860591f0dfc85571cfbd023dd199e17e73.
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Use compile-time flag to indicate dynamic CREFs
The inline constant cache previously used `RCLASS_SINGLETON_P` to detect
"unstable" CREFs that need ic... jhawthorn (John Hawthorn)