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I haven't done JS in a while, but it sounds to me like it is referenced, just not in source code. `someMethod` references it implicitly. Is my understanding c

• gsnedders 9y ago
  Yes. The function's frame contains a reference to the object storing local variables of the parent frame. To do better you need to store a list of variables referenced (which you can only do if there's neither direct-eval nor a with statement).