[Bug fortran/67524] ICE on using implicit character instead of implicit none etc.

["gerhard dot steinmetz dot fortran at t-online dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67524

--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
Here, all variables are declared explicitly,
but using "implicit character" ...


$ cat z1_imchfe.f90
module m
   implicit character(8) (a-z)
contains
   function f(x)
      integer :: x
      integer :: f
      real :: e
      f = x
      return
   entry e(x)
      e = x
   end
end module

program p
   use m
   print *, f(1)
   print *, e(1)
end


or this variation ...

$ cat z2_imchfe.f90
module m
   implicit none
contains
   function f(x)
      implicit character(8) (a-z)
      integer :: x
      integer :: f
      real :: e
      f = x
      return
   entry e(x)
      e = x
   end
end module

program p
   use m
   print *, f(1)
   print *, e(1)
end


yields : (with gfortran 5.2.1 on SUSE Linux 13.2)

$ gfortran -g -O0 -Wall -fcheck=all -fno-frontend-optimize z1_imchfe.f90
internal compiler error: in build_entry_thunks, at fortran/trans-decl.c:2607