[Bug fortran/104649] New: ICE in gfc_match_formal_arglist, at fortran/decl.cc:6733

["gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104649

            Bug ID: 104649
           Summary: ICE in gfc_match_formal_arglist, at
                    fortran/decl.cc:6733
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Affects versions down to r6 :


$ cat z1.f90
module m
   interface
      module subroutine s(x)
         real :: x
      end
   end interface
end
submodule(m) m2
contains
   module subroutine s(*)
   end
end


$ cat z2.f90
module m
   interface
      module subroutine s(*)
      end
   end interface
end
submodule(m) m2
contains
   module subroutine s(x)
      real :: x
   end
end


$ gfortran-12-20220220 -c z1.f90
f951: internal compiler error: Segmentation fault
0xcc909f crash_signal
        ../../gcc/toplev.cc:322
0x6d9f81 gfc_match_formal_arglist(gfc_symbol*, int, int, bool)
        ../../gcc/fortran/decl.cc:6733
0x6dfaaf gfc_match_subroutine()
        ../../gcc/fortran/decl.cc:7957
0x74bb57 decode_statement
        ../../gcc/fortran/parse.cc:384
0x74d54a next_free
        ../../gcc/fortran/parse.cc:1397
0x74d54a next_statement
        ../../gcc/fortran/parse.cc:1629
0x751f8c parse_contained
        ../../gcc/fortran/parse.cc:6039
0x752e17 parse_module
        ../../gcc/fortran/parse.cc:6466
0x753147 gfc_parse_file()
        ../../gcc/fortran/parse.cc:6773
0x7a0a5f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.cc:216