[Bug c++/88258] [9 Regression] Infinite loop emitting diagnostics in the C++ front-end

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88258

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 45120
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45120&action=edit
preprocessed source to reproduce diagnostic loop

Confirmed, here is a reproducer I found the other day.