[Bug fortran/99206] New: [11 Regression] ICE in add_init_expr_to_sym, at fortran/decl.c:1980

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99206

            Bug ID: 99206
           Summary: [11 Regression] ICE in add_init_expr_to_sym, at
                    fortran/decl.c:1980
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Changed between 20200823 and 20201004 :
(z1 is invalid, z2 looks valid)


$ cat z1.f90
program p
   character(:), parameter :: a(0) = reshape(['a'], [0])
end


$ cat z2.f90
program p
   character(*), parameter :: a(0) = reshape(['a'], [0])
end


$ gfortran-11-20200823 -c z1.f90
z1.f90:2:34:

    2 |    character(:), parameter :: a(0) = reshape(['a'], [0])
      |                                  1
Error: Entity 'a' at (1) has a deferred type parameter and requires either the
POINTER or ALLOCATABLE attribute


$ gfortran-11-20210221 -c z1.f90
f951: internal compiler error: in add_init_expr_to_sym, at fortran/decl.c:1980
0x66d3e0 add_init_expr_to_sym
        ../../gcc/fortran/decl.c:1980
0x676f8a variable_decl
        ../../gcc/fortran/decl.c:2996
0x676f8a gfc_match_data_decl()
        ../../gcc/fortran/decl.c:6203
0x6db9c3 match_word
        ../../gcc/fortran/parse.c:65
0x6db9c3 decode_statement
        ../../gcc/fortran/parse.c:376
0x6dd40c next_free
        ../../gcc/fortran/parse.c:1316
0x6dd40c next_statement
        ../../gcc/fortran/parse.c:1548
0x6df7d4 parse_spec
        ../../gcc/fortran/parse.c:3783
0x6e184c parse_progunit
        ../../gcc/fortran/parse.c:5896
0x6e2f41 gfc_parse_file()
        ../../gcc/fortran/parse.c:6437
0x72f98f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:212