[Bug c/103215] [12 regression] gcc generates unexpected warnings on libx11-1.7.2: error: array subscript -2 is outside array bounds of

[slyfox at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103215

--- Comment #1 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
Created attachment 51781
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51781&action=edit
orig.bug.c

Attaching orig.bug.c in case I corrupted original too much.