Subject: bug#76559: 31.0.50; [-O3 + PGTK] Crash when 'copying as kill'/'killing word'

From: Po Lu <[email-masked]>
Date: Sat, 01 Mar 2025 11:20:19 +0800

Pip Cet <[email-masked]> writes:

> My understanding is it is safe to access an entire union at once, as the
> old code did, and that GCC concluded based on the undefined behavior
> elsewhere that the only possible union members were those with the holes
> in the right place.

BTW, if so, how do you explain this reproducer?  At no point in the
code's execution is hold_quit ever read or written to.