[issue12029] Catching virtual subclasses in except clauses

[Nick Coghlan]

Nick Coghlan added the comment:

A point on the safety/correctness front: I remembered we already run arbitrary code at roughly this point in the eval loop, as we have to invoke __iter__ to get the exceptions to check when an iterable is used in except clause.

That means allowing the subclass check hooks to run here isn't as radical a change as I first thought.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12029>
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