Issue 24596: Script globals in a GC cycle not finalized when exiting with SystemExit (original) (raw)

Issue24596

Created on 2015-07-09 13:31 by petr.viktorin, last changed 2022-04-11 14:58 by admin. This issue is now closed.

Messages (6)
msg246491 - (view)	Author: Petr Viktorin (petr.viktorin) *	Date: 2015-07-09 13:31
When this program is invoked as a script (`python reproducer.py`), the __del__ is never called: --- class ClassWithDel: def __del__(self): print('__del__ called') a = ClassWithDel() a.link = a raise SystemExit(0) --- Raising a different exception, moving the code to a function, importing the module, or invoking with -m (or even -c), causes __del__ to be called normally.
msg246498 - (view)	Author: Antoine Pitrou (pitrou) *	Date: 2015-07-09 13:55
It's likely that your global variable gets caught in the traceback attached to the SystemExit, and that either never gets deallocated, or gets deallocated too late.
msg246502 - (view)	Author: Antoine Pitrou (pitrou) *	Date: 2015-07-09 14:10
Actually, the problem is in PyRun_SimpleFileExFlags(). The executed module is decref'ed after calling PyErr_Print(), but the latter never returns when the exception is a SystemExit.
msg321001 - (view)	Author: Antoine Pitrou (pitrou) *	Date: 2018-07-03 19:47
New changeset d8cba5d16f1333fd625726fc72e66afbd45b8d00 by Antoine Pitrou (Zackery Spytz) in branch 'master': bpo-24596: Decref module in PyRun_SimpleFileExFlags() on SystemExit (GH-7918) https://github.com/python/cpython/commit/d8cba5d16f1333fd625726fc72e66afbd45b8d00
msg321003 - (view)	Author: Antoine Pitrou (pitrou) *	Date: 2018-07-03 20:13
New changeset 20ae4c60258479a0732d12af292f422679444e2c by Antoine Pitrou (Miss Islington (bot)) in branch '3.7': bpo-24596: Decref module in PyRun_SimpleFileExFlags() on SystemExit (GH-7918) (GH-8070) https://github.com/python/cpython/commit/20ae4c60258479a0732d12af292f422679444e2c
msg321004 - (view)	Author: Antoine Pitrou (pitrou) *	Date: 2018-07-03 20:17
New changeset e1ebf51f76037b7e02711aaeb9bf66c9147f4c74 by Antoine Pitrou (Miss Islington (bot)) in branch '3.6': bpo-24596: Decref module in PyRun_SimpleFileExFlags() on SystemExit (GH-7918) (GH-8069) https://github.com/python/cpython/commit/e1ebf51f76037b7e02711aaeb9bf66c9147f4c74