[Bug fortran/104314] New: ICE in deferred_op_assign, at fortran/resolve.cc:11794

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104314

            Bug ID: 104314
           Summary: ICE in deferred_op_assign, at fortran/resolve.cc:11794
           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 at least r5 :


$ cat z1.f90
program p
   character(:), allocatable :: c(:)
   c = ['123']
   c = c == c
end


$ gfortran-12-20220130 -c z1.f90
z1.f90:4:7:

    4 |    c = c == c
      |       1
Error: Cannot convert LOGICAL(4) to CHARACTER(0) at (1)
f951: internal compiler error: Segmentation fault
0xe6e49f crash_signal
        ../../gcc/toplev.cc:322
0x7a979c deferred_op_assign
        ../../gcc/fortran/resolve.cc:11794
0x7a979c gfc_resolve_code(gfc_code*, gfc_namespace*)
        ../../gcc/fortran/resolve.cc:12063
0x7a98e7 resolve_codes
        ../../gcc/fortran/resolve.cc:17537
0x7a99ae gfc_resolve(gfc_namespace*)
        ../../gcc/fortran/resolve.cc:17572
0x791cd4 resolve_all_program_units
        ../../gcc/fortran/parse.cc:6586
0x791cd4 gfc_parse_file()
        ../../gcc/fortran/parse.cc:6842
0x7dff7f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.cc:216