"x".upper.replace("y") throws "Method 'method_replace' not found"

[phorward]

By design, this issue points to an inconsistency, as the first method isn't called, and holds a reference to the method call.

This fails:

>>> "Glasflügel".upper.replace("L")
Line 1, column 20: Method 'method_replace' not found

This works:

>>> "Glasflügel".upper().replace("L")
"GASFÜGE"

Such a case should only appear when the #17 *deref-operator is being used.