[Bug c/71573] ICE on invalid C code on x86_64-linux-gnu (tree check: expected function_decl, have var_decl in implicitly_declare)

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71573

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
gcc34 is fine:
q.c: In function `f2':
q.c:4: error: called object is not a function

but even r104500 ICEs, so this is ancient regression.