gcc/testsuite/gnat.dg/object_overflow3.adb

-- { dg-do compile }

procedure Object_Overflow3 is

  procedure Proc (x : Boolean) is begin null; end;

  type Arr is array(0 .. Long_Integer'Last) of Boolean;

  type Rec is record
    A : Arr;
    B : Arr;
  end record;

  Obj : Rec; -- { dg-warning "Storage_Error" }

begin
  Obj.A(1) := True;
  Proc (Obj.A(1));
end;