[Bug fortran/66575] Endless compilation on missing end interface

[gerhard.steinmetz.fortran@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66575

--- Comment #3 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
Playing around, I've found other cases (wrong code with procedure)
causing endless compilation on my environment, e.g.


$ cat zlctp_1.f90
program p
   procedure(g) :: g
   procedure(g) :: g
end


$ cat zlctp_2.f90
program p
   procedure(g) :: g
   procedure(g) !! anything
end


$ time gfortran -c zlctp_2.f90      # with 5.1.1, 4.9.0, 4.8.3
# ^C after a few minutes

real    3m46.187s
user    0m0.000s
sys     0m0.002s