$ gfortran --version
GNU Fortran 95 (GCC) 4.2.0 20060923 (experimental)
$ cat foo.f90
MODULE foo
CONTAINS
SUBROUTINE sub1(a)
CHARACTER (LEN=*), OPTIONAL :: a
WRITE(*,*) 'foo bar'
END SUBROUTINE sub1
SUBROUTINE sub2
CALL sub1()
END SUBROUTINE sub2
END MODULE foo
$ gfortran -c foo.f90
foo.f90: In function ‘sub2’:
foo.f90:3: internal compiler error: Segmentation fault
gcc-4.2-20060812 can compile the same code.
--
Summary: ICE for optional subroutine argument
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rakuen_himawari at yahoo dot co dot jp
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29284
