gcc/testsuite/gnat.dg/object_overflow2.adb

-- { dg-do compile }

procedure Object_Overflow2 is

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

  type Arr is array(0 .. Long_Integer'Last) of Boolean;
  Obj : Arr; -- { dg-warning "Storage_Error" }

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