gh-89455: Fix an uninitialized bool in exception print context. by gpshead · Pull Request #91466 · python/cpython
Fix an uninitialized bool in exception print context.
struct exception_print_context.need_close was uninitialized.
Found by oss-fuzz in a test case running under the undefined behavior sanitizer.
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=46618
https://oss-fuzz.com/testcase-detail/6217746058182656
Python/pythonrun.c:1241:28: runtime error: load of value 253, which is not a valid value for type 'bool'
#0 0xbf2203 in print_chained cpython3/Python/pythonrun.c:1241:28
#1 0xbea4bb in print_exception_cause_and_context cpython3/Python/pythonrun.c:1320:19
#2 0xbea4bb in print_exception_recursive cpython3/Python/pythonrun.c:1470:13
#3 0xbe9e39 in _PyErr_Display cpython3/Python/pythonrun.c:1517:9
Pretty obvious what the ommission was upon code inspection.