[Bug c++/84446] [8 Regression] ICE with broken lambda

[paolo.carlini at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84446

--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
... well, I must add the diagnostic would be much more terse and similar to,
eg, clang's.