[issue17611] Move unwinding of stack for "pseudo exceptions" from interpreter to compiler.

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

I took a quick look at Mark's PR.  The main thing going for it IMHO is that it produces simpler bytecode: it removes the complicated with/finally-related opcodes, while Serhiy's has non-trivial END_FINALLY and POP_FINALLY.

It would be nice to know if it's able to fix the stack size issues as in the following tests:
https://github.com/python/cpython/pull/5006/files?diff=unified#diff-dae68b96e8fdcb924e1ea46c31f51aec

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