bug#30931: 27.0.50; Crash in "Automatic GC"

[Eli Zaretskii]

> From: Michał Kondraciuk <k.michal@zoho.com>
> Date: Sat, 24 Mar 2018 21:30:56 +0100
> 
> Newest Emacs (and 25.3) crashes for me. Unfortunately I can only 
> reproduce this using newest versions of Ivy and yasnippet packages.

Please post a reproduction recipe starting with "emacs -Q" and loading
the necessary packages.

Thanks.