Issue 12 in livecoding: MODE_UPDATE leaks old classes

[livec...@googlecode.com]

Status: Accepted
Owner: richard.m.tew
Labels: Type-Defect Priority-Medium

New issue 12 by richard.m.tew: MODE_UPDATE leaks old classes
http://code.google.com/p/livecoding/issues/detail?id=12

MODE_UPDATE works by executing a changed script file into a custom globals
dictionary, then processing what is in there, transferring the interesting
bits over to the first loaded version of that script.

However, in my usage of it, I am seeing the classes in the changed script
file hanging around. So if I look up all the subclasses of a given base
class, I will find any version of those subclasses which has ever existed.

This appears to be because of the circular reference between a class and
the func_globals variable on the functions defined on it. But this does
not seem like it should be a problem.

For now, I clear the globals dictionary for a script (which is what
func_globals on every class function within that script points to) when
that script is garbage collected. Which works as a workaround.

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