[Bug c++/100101] [11 Regression] ICE with -Wzero-as-null-pointer-constant

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100101

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
In particular it is the TYPENAME_TYPE type seen in bar's noexcept expression.

Does find_typenames_r ever want to walk into expressions?
I.e. couldn't the fix be
  if (EXPR_P (*tp))
    *walk_subtrees = 0;
?