Subject: bug#47378: Emacs 27.1 binary Mac OS build crashes on Big Sur (11.x)

From: Eli Zaretskii <[email-masked]>
Date: Fri, 26 Mar 2021 21:46:42 +0300

> From: Philipp <[email-masked]>
> Date: Fri, 26 Mar 2021 18:56:04 +0100
> Cc: [email-masked]
> 
> Looks like a double-free in draw_glyphs?  But that function is massive, so without further instrumentation it might be difficult to pin down the exact problem.

AFAICT, the only call to malloc in draw_glyphs is via SAFE_ALLOCA.