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[3.7] bpo-36829: Enhance PyErr_WriteUnraisable()#13487
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PyErr_WriteUnraisable() now displays the exception even if displayingthe traceback failed. Moreover, hold a strong reference to sys.stderrwhile using it.Document that an exception must be set when callingPyErr_WriteUnraisable(), but don't add an assertion to check it atruntime.Cleanup: use longer names for variables and createwrite_unraisable_exc_file() subfunction.
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PyErr_WriteUnraisable() now displays the exception even if displaying
the traceback failed. Moreover, hold a reference to sys.stderr while
using it.
Document that an exception must be set when calling
PyErr_WriteUnraisable(), but don't add an assertion to check it at
runtime.
Cleanup: use longer names for variables and create
write_unraisable_exc_file() subfunction.
https://bugs.python.org/issue36829