[Bug c++/88036] bogus "was not declared in this scope; did you mean ...?" fix-it when the declaration was ill-formed

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88036

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I realise this is non-trivial, because the erroneous declaration may not even
have been parsed as a declaration.