Ruby Issue Tracking System

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)