[Bug sanitizer/80973] ICE with lambda and -fsanitize=undefined

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80973

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41507
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41507&action=edit
gcc8-pr80973.patch

Untested fix.