Thanks for the info! I remember seeing references to the "the stack isn't refcounted bug" from my casual lurking on P5P - I just checked again and recent references appear to be Stack refcount synopsis and perl #114372. If it's unclear when it'll be fixed, maybe it would make sense to include a blurb about the nature of the bug in the documentation, something like what you wrote here in this thread?

In reply to Re^4: How come @_ gets changed here? by haukex
in thread How come @_ gets changed here? by pritesh_ugrankar

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