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use Contextmanagers to handle StopIteration in generators #12934

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RonnyPfannschmidt
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  • prepare example test for stopiteration passover issue
  • WIP: use contextmanagers instead of yield from

yield from is a generator boundary that transfers StopIteration into a RuntimeError

closes #12929

as it turns out, StopIteration is not transparent on the boundaries of generators
@RonnyPfannschmidt RonnyPfannschmidt added this to the 8.4 milestone Nov 12, 2024
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graingert commented Dec 9, 2024

src/_pytest/threadexception.py and src/_pytest/unraisableexception.py both use regular trylast hooks instead of generators, so the conflicts can be resolved by checking them out from main

@@ -0,0 +1,87 @@
"""
test example file exposing mltiple issues with corutine exception passover in case of stopiteration
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@graingert graingert Dec 19, 2024

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Suggested change
test example file exposing mltiple issues with corutine exception passover in case of stopiteration
test example file exposing multiple issues with coroutine exception passover in case of stopiteration

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tests raising StopIteration break pytest/pluggy
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