Ruby Issue Tracking System

09/17/2026

05:10 AM Ruby Bug #22323: Incorrect nonnull contract changes rb_typeddata_inherited_p(NULL, NULL) behavior

Oh I see the point. Thank you for the clarification and commit! yqtian (Yongqiang Tian)

01:19 AM Ruby Bug #22323: Incorrect nonnull contract changes rb_typeddata_inherited_p(NULL, NULL) behavior

Thank you. By “the explicit equality behavior,” I meant this check at the
beginning of the inline implementation:
if (RB_LIKELY(child == parent))
return true;
The current header therefore gives three conflicting signa... yqtian (Yongqiang Tian)

09/16/2026

09:11 AM Ruby Bug #22324 (Closed): Pure attributes allow Clang to remove observable C API effects

Several public C APIs are marked `RBIMPL_ATTR_PURE()` even though their
documented behavior includes observable effects. Clang can consequently remove
calls when an extension discards the return value.
I reproduced three cases again... yqtian (Yongqiang Tian)

09:04 AM Ruby Bug #22323 (Closed): Incorrect nonnull contract changes rb_typeddata_inherited_p(NULL, NULL) behavior

`rb_typeddata_inherited_p()` documents that both arguments may be `NULL`,
and its implementation returns true for `(NULL, NULL)`. However, both the
exported declaration and the inline implementation are marked with
`RBIMPL_ATTR_NONNUL... yqtian (Yongqiang Tian)

09/15/2026

07:33 AM Ruby Bug #22254: [Prism] Clang UBSan reports NULL/0 memcpy while serializing empty strings

Thanks a lot. yqtian (Yongqiang Tian)

07:33 AM Ruby Bug #22253: Clang UBSan reports NULL/0 memcpy for eval scope locals

Thanks. yqtian (Yongqiang Tian)

08/20/2026

07:25 AM Ruby Bug #22254 (Assigned): [Prism] Clang UBSan reports NULL/0 memcpy while serializing empty strings

I found a public `Prism.dump` path that passes a null source and zero length to
`memcpy` in Prism's buffer helper. Clang's `nonnull-attribute` sanitizer reports
the call because the effective glibc declaration marks the first two `memc... yqtian (Yongqiang Tian)

07:17 AM Ruby Bug #22253 (Assigned): Clang UBSan reports NULL/0 memcpy for eval scope locals

I found a normal Ruby eval path that passes a null source and zero length to
`memcpy` in Prism. Clang's `nonnull-attribute` sanitizer reports the call
because the effective glibc declaration marks the first two `memcpy` arguments
as n... yqtian (Yongqiang Tian)