Rename sys to _sys and proxy it. #2
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```
Direct leak of 8 byte(s) in 1 object(s) allocated from:
#0 0x7f008bf19667 in __interceptor_malloc (/lib64/libasan.so.6+0xb0667)
#1 0x7f007a0bee4a in subprocess_fork_exec /home/heimes/dev/python/cpython/Modules/_posixsubprocess.c:774
#2 0xe0305b in cfunction_call Objects/methodobject.c:546
```
Signed-off-by: Christian Heimes <christian@python.org>
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…python#91466) 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://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.
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