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From: "gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/95980] New: ICE in get_unique_type_string, at
 fortran/class.c:485
Date: Mon, 29 Jun 2020 17:53:48 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95980

            Bug ID: 95980
           Summary: ICE in get_unique_type_string, at fortran/class.c:485
           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: ---

Affects versions down to at least r5.
With a missing attribute allocatable or pointer :


$ cat z1.f90
program p
   type t
      integer :: a
   end type
   class(t) :: x
   select type (y =3D> x)
   end select
end


$ gfortran-11-20200628 -c z1.f90
f951: internal compiler error: Segmentation fault
0xbd215f crash_signal
        ../../gcc/toplev.c:328
0x63535a get_unique_type_string
        ../../gcc/fortran/class.c:485
0x635de1 get_unique_hashed_string
        ../../gcc/fortran/class.c:522
0x6392ce gfc_build_class_symbol(gfc_typespec*, symbol_attribute*,
gfc_array_spec**)
        ../../gcc/fortran/class.c:666
0x68f543 gfc_match_select_type()
        ../../gcc/fortran/match.c:6422
0x6ae2b4 match_word
        ../../gcc/fortran/parse.c:65
0x6ae2b4 decode_statement
        ../../gcc/fortran/parse.c:428
0x6afaea next_free
        ../../gcc/fortran/parse.c:1280
0x6afaea next_statement
        ../../gcc/fortran/parse.c:1512
0x6b113b parse_spec
        ../../gcc/fortran/parse.c:3923
0x6b3f0c parse_progunit
        ../../gcc/fortran/parse.c:5852
0x6b55e9 gfc_parse_file()
        ../../gcc/fortran/parse.c:6393
0x7016ff gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:212=