Chris Jerdonek <[email protected]> added the comment:
Good to hear, Mariusz! And thanks for the report!
Also, as discussed above, I'm leaving this issue open (and retitling) until the
following more general issue is fixed:
try:
raise RuntimeError
except Exception as exc:
print(f'handling: {exc!r}')
exc.__context__ = exc
raise ValueError # hangs
As I mentioned above, I believe this is because _PyErr_SetObject() only checks
for cycles that involve the exception being raised. In this case, the cycle
involves the exception one further down:
ValueError -> RuntimeError -> RuntimeError -> RuntimeError -> ...
----------
title: Exception handling with "await" can hang in Python3.9.0b1 -> exception
chain cycles cause hangs (was "Exception handling with "await" can hang in
Python3.9.0b1")
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Python tracker <[email protected]>
<https://bugs.python.org/issue40696>
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