[Bug fortran/103475] New: ICE in gfc_expr_attr, at fortran/primary.c:2782

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103475

            Bug ID: 103475
           Summary: ICE in gfc_expr_attr, at fortran/primary.c:2782
           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: ---

With option -Wall and a missing attribute allocatable or pointer :
(affects version down to at least r5)
(gcc configured with --enable-checking=yes)


$ cat z1.f90
program p
   type t
   end type
   class(t) :: x
   y = x()
end


$ gfortran-12-20211128 -c z1.f90 -Wall
z1.f90:4:16:

    4 |    class(t) :: x
      |                1
Error: CLASS variable 'x' at (1) must be dummy, allocatable or pointer
f951: internal compiler error: Segmentation fault
0xf0942f crash_signal
        ../../gcc/toplev.c:322
0x842464 gfc_expr_attr(gfc_expr*)
        ../../gcc/fortran/primary.c:2782
0x7e02eb gfc_check_assign(gfc_expr*, gfc_expr*, int, bool)
        ../../gcc/fortran/expr.c:3734
0x84a6d5 resolve_ordinary_assign
        ../../gcc/fortran/resolve.c:11188
0x852a3c gfc_resolve_code(gfc_code*, gfc_namespace*)
        ../../gcc/fortran/resolve.c:12047
0x854f97 resolve_codes
        ../../gcc/fortran/resolve.c:17536
0x85505e gfc_resolve(gfc_namespace*)
        ../../gcc/fortran/resolve.c:17571
0x83d314 resolve_all_program_units
        ../../gcc/fortran/parse.c:6573
0x83d314 gfc_parse_file()
        ../../gcc/fortran/parse.c:6829
0x88b37f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:216