[Bug fortran/83742] New: [8 Regression] ICE in gfc_is_simply_contiguous, at fortran/expr.c:5323

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83742

            Bug ID: 83742
           Summary: [8 Regression] ICE in gfc_is_simply_contiguous, at
                    fortran/expr.c:5323
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

With this testcase :

$ cat z1.f90
program p
   real, target :: a
   real, pointer, contiguous :: b => a
end


$ gfortran-8-20170924 -c z1.f90
z1.f90:3:33:

    real, pointer, contiguous :: b => a
                                 1
Error: 'b' at (1) has the CONTIGUOUS attribute but is not an array pointer or
an assumed-shape or assumed-rank array


$ gfortran-8-20171008 -c z1.f90
f951: internal compiler error: Segmentation fault
#...


$ gfortran-8-20180107 -c z1.f90
f951: internal compiler error: Segmentation fault
0xb8c1ef crash_signal
        ../../gcc/toplev.c:325
0x6aa5ec gfc_is_simply_contiguous(gfc_expr*, bool, bool)
        ../../gcc/fortran/expr.c:5323
0x6ab4ce gfc_check_pointer_assign(gfc_expr*, gfc_expr*)
        ../../gcc/fortran/expr.c:3916
0x6ab8fa gfc_check_assign_symbol(gfc_symbol*, gfc_component*, gfc_expr*)
        ../../gcc/fortran/expr.c:4005
0x68dd1c add_init_expr_to_sym
        ../../gcc/fortran/decl.c:1693
0x697193 variable_decl
        ../../gcc/fortran/decl.c:2589
0x697193 gfc_match_data_decl()
        ../../gcc/fortran/decl.c:5692
0x6f1d39 match_word_omp_simd
        ../../gcc/fortran/parse.c:93
0x6f542e match_word
        ../../gcc/fortran/parse.c:376
0x6f542e decode_statement
        ../../gcc/fortran/parse.c:376
0x6f7264 next_free
        ../../gcc/fortran/parse.c:1226
0x6f7264 next_statement
        ../../gcc/fortran/parse.c:1458
0x6f8b4c parse_spec
        ../../gcc/fortran/parse.c:3836
0x6fb003 parse_progunit
        ../../gcc/fortran/parse.c:5649
0x6fc5e4 gfc_parse_file()
        ../../gcc/fortran/parse.c:6189
0x742cef gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:204