https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71265
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
In c_make_fname_decl:
if (current_function_decl
&& (!seen_error () || current_function_scope))
bind (..., current_function_scope, ...)
The condition is wrong; if current_function_scope is null then we must not call
bind, otherwise we segv. That's what happens here because seen_error () is 0
at that point.
