[Bug fortran/88228] New: ICE in check_null, at fortran/expr.c:2691

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88228

            Bug ID: 88228
           Summary: ICE in check_null, at fortran/expr.c:2691
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

With option -fdec since gfortran-7 :


$ cat z1.f90
program p
   integer :: n = .not. 1
end


$ cat z2.f90
program p
   integer :: j = .true. .or. 1
end


$ gfortran-9-20181125 -c z1.f90
z1.f90:2:23:

    2 |    integer :: n = .not. 1
      |                       1
Error: Operand of .not. operator at (1) is INTEGER(4)


$ gfortran-9-20181125 -c z1.f90 -fdec
f951: internal compiler error: Segmentation fault
0xb2bcff crash_signal
        ../../gcc/toplev.c:326
0x61e8f6 check_null
        ../../gcc/fortran/expr.c:2691
0x61e8f6 gfc_check_init_expr(gfc_expr*)
        ../../gcc/fortran/expr.c:2792
0x61ecb7 gfc_reduce_init_expr(gfc_expr*)
        ../../gcc/fortran/expr.c:2955
0x621d90 gfc_match_init_expr(gfc_expr**)
        ../../gcc/fortran/expr.c:3001
0x60f189 variable_decl
        ../../gcc/fortran/decl.c:2710
0x60f189 gfc_match_data_decl()
        ../../gcc/fortran/decl.c:5921
0x66dc23 match_word
        ../../gcc/fortran/parse.c:65
0x66dc23 decode_statement
        ../../gcc/fortran/parse.c:376
0x66f6aa next_free
        ../../gcc/fortran/parse.c:1234
0x66f6aa next_statement
        ../../gcc/fortran/parse.c:1466
0x671a14 parse_spec
        ../../gcc/fortran/parse.c:3674
0x673787 parse_progunit
        ../../gcc/fortran/parse.c:5671
0x674e09 gfc_parse_file()
        ../../gcc/fortran/parse.c:6211
0x6bdaff gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:204