https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113349
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Looks like the ICE started with r11-7095:
commit 7b258ac7afaaf7d8157df10ea35c6002d935d7d0
Author: Jason Merrill <ja...@redhat.com>
Date: Mon Feb 1 17:24:05 2021 -0500
c++: subst failure in attribute argument [PR95192]
