https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79936
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> --- Can you create a translation unit by saving the output of the -E option and attach it? From the stack trace in attachment 40902 it looks like the abort is in the diagnostic code (diagnostic_impl) and so not very likely to be directly caused by the warning but we need to reproduce it to tell for sure.
