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From: "neil.n.carlson at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/100815] New: [11 regression] Segfault assigning to
 scalar allocatable polymorphic LHS
Date: Fri, 28 May 2021 15:14:45 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100815

            Bug ID: 100815
           Summary: [11 regression] Segfault assigning to scalar
                    allocatable polymorphic LHS
           Product: gcc
           Version: 11.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: neil.n.carlson at gmail dot com
  Target Milestone: ---

The current head of the gcc-11 branch segfaults on the assignment statement=
 in
the following program. The program runs without error with the 10.x and 9.x
compilers.

type, abstract :: func
end type

type, extends(func) :: const_func
  real :: c =3D 0.0
end type

type :: func_box
  class(func), allocatable :: f
end type

type :: foo
  type(func_box), allocatable :: farray(:)
end type

type(const_func) :: f
type(foo) :: this

allocate(this%farray(2))
this%farray(size(this%farray))%f =3D f

end=