bpo-46841: Don't scan backwards in bytecode. #31901
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markshannon changed the title 
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brandtbucher approved these changes Mar 15, 2022
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Thanks!
I'll take care of the merge conflict so I can use this over in #31888.
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Avoid scanning backwards when working out whether to trace a line, or whether we are in a
yield from.This should help with #31888.
https://bugs.python.org/issue46841