Deletion of local variables in functions is not supported

[scoder]

def test():
    i = 1
    del i

raises a compiler error. Supporting this might depend on better flow analysis.

A half-way-there implementation for local Python variables can be DECREF-ing them and setting them to NULL on "del", so that you'd get a compile time crash if you use them later on. This expects that users who use "del" know what they are doing.

[dagss]

As long as the objective here is only full Python compatability, I think it should be OK to have "del" trigger checking for NULL on all access to the variable within the function. Horrible for speed but if you want speed, just set the objects to None instead. I think this is more reasonable than expecting the users of del to be experts.