Fix misleading error message for memoized Handles.
Fix misleading error message for memoized Handles.


Former-commit-id: 5fafad83dede85636eaf3dc35b9469bc8ebe3f35
Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide