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From: "gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/95881] New: [9/10/11 Regression] ICE in resolve_symbol, 
 at fortran/resolve.c:15175
Date: Wed, 24 Jun 2020 18:53:31 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95881

            Bug ID: 95881
           Summary: [9/10/11 Regression] ICE in resolve_symbol, at
                    fortran/resolve.c:15175
           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 r7, with a missing attribute :


$ cat z1.f90
program p
   type t
      real, allocatable :: a[:]
   end type
   class(t) :: x
   allocate (x%a[*])
end


$ cat z2.f90
subroutine s(x)
   type t
      real, allocatable :: a[:]
   end type
   block
      class(t) :: x
      allocate (x%a[*])
   end block
end


$ gfortran-6 -c z1.f90 -fcoarray=3Dlib
z1.f90:5:16:

    class(t) :: x
                1
Error: CLASS variable 'x' at (1) must be dummy, allocatable or pointer


$ gfortran-11-20200621 -c z1.f90 -fcoarray=3Dsingle
z1.f90:5:16:

    5 |    class(t) :: x
      |                1
Error: CLASS variable 'x' at (1) must be dummy, allocatable or pointer


$ gfortran-11-20200621 -c z1.f90 -fcoarray=3Dlib
f951: internal compiler error: Segmentation fault
0xbce57f crash_signal
        ../../gcc/toplev.c:328
0x6cda25 resolve_symbol
        ../../gcc/fortran/resolve.c:15175
0x6ebde2 do_traverse_symtree
        ../../gcc/fortran/symbol.c:4162
0x6d1094 resolve_types
        ../../gcc/fortran/resolve.c:17175
0x6cc7ac gfc_resolve(gfc_namespace*)
        ../../gcc/fortran/resolve.c:17290
0x6b48ec resolve_all_program_units
        ../../gcc/fortran/parse.c:6246
0x6b48ec gfc_parse_file()
        ../../gcc/fortran/parse.c:6493
0x70098f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:212=