[Bug fortran/18737] New: ICE on invalid use of external keyword

[coudert at clipper dot ens dot fr]

$ cat a.f90 
program test
  implicit none
  real(8) :: x
  external bug

  x = 2
  print *, bug(x)
  
end program test


$ gfortran -c a.f90
a.f90: In function �MAIN__�:
a.f90:7: internal compiler error: in gfc_typenode_for_spec, at
fortran/trans-types.c:613

-- 
           Summary: ICE on invalid use of external keyword
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: coudert at clipper dot ens dot fr
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: i686-unkown-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18737