[Bug fortran/95091] New: ICE in gfc_hash_value, at fortran/class.c:538

[gs...@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95091

            Bug ID: 95091
           Summary: ICE in gfc_hash_value, at fortran/class.c:538
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gs...@t-online.de
  Target Milestone: ---

A more complex example, switches between 44 (ok) and 45 (ICE) :
(backtrace varies with release and name length)


$ cat z1_44.f90
module m2345678901234567890123456789012345678901234
  type t2345678901234567890123456789012345678901234
  end type
  interface
    module subroutine s2345678901234567890123456789012345678901234 &
      (x2345678901234567890123456789012345678901234)
    end
  end interface
end
submodule(m2345678901234567890123456789012345678901234) &
  n2345678901234567890123456789012345678901234
  type, extends(t2345678901234567890123456789012345678901234) :: &
    u2345678901234567890123456789012345678901234
  end type
end


$ cat z1_45.f90
module m23456789012345678901234567890123456789012345
  type t23456789012345678901234567890123456789012345
  end type
  interface
    module subroutine s23456789012345678901234567890123456789012345 &
      (x23456789012345678901234567890123456789012345)
    end
  end interface
end
submodule(m23456789012345678901234567890123456789012345) &
  n23456789012345678901234567890123456789012345
  type, extends(t23456789012345678901234567890123456789012345) :: &
    u23456789012345678901234567890123456789012345
  end type
end


$ cat z1_63.f90
module m23456789012345678901234567890123456789012345678901234567890123
  type t23456789012345678901234567890123456789012345678901234567890123
  end type
  interface
    module subroutine
s23456789012345678901234567890123456789012345678901234567890123 &
      (x23456789012345678901234567890123456789012345678901234567890123)
    end
  end interface
end
submodule(m23456789012345678901234567890123456789012345678901234567890123) &
  n23456789012345678901234567890123456789012345678901234567890123
  type,
extends(t23456789012345678901234567890123456789012345678901234567890123) :: &
    u23456789012345678901234567890123456789012345678901234567890123
  end type
end


$ gfortran-11-20200510 -c z1_44.f90
$
$ gfortran-11-20200510 -c z1_45.f90
f951: internal compiler error: Segmentation fault
0xbb93cf crash_signal
        ../../gcc/toplev.c:328
0x64003a gfc_match_function_decl()
        ../../gcc/fortran/decl.c:7355
gfortran: internal compiler error: Segmentation fault signal terminated program
f951


$ gfortran-11-20200510 -c z1_63.f90
f951: internal compiler error: Segmentation fault
0xbb93cf crash_signal
        ../../gcc/toplev.c:328
0x62c64c gfc_hash_value(gfc_symbol*)
        ../../gcc/fortran/class.c:538
gfortran: internal compiler error: Segmentation fault signal terminated program
f951
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.