New submission from Guo, Jiahua:
$ python3.5-dbg crash.py
python3.5-dbg: ../Modules/gcmodule.c:364: update_refs: Assertion
`((gc)->gc.gc_refs >> (1)) != 0' failed.
$ python3.5-dbg crash-multithread.py
python3.5-dbg: ../Modules/gcmodule.c:364: update_refs: Assertion
`((gc)->gc.gc_refs >> (1)) != 0' failed.
crash.py ==
import weakref
import gc
def callback(o):
gc.collect()
class C:
def __del__(self):
pass
def main():
c = C()
cref = weakref.ref(c, callback)
del c
main()
crash-multithread.py ==
import threading
import weakref
import gc
ei = threading.Event()
eo = threading.Event()
def gc_worker():
ei.wait()
gc.collect()
eo.set()
def callback(o):
ei.set()
eo.wait()
class C:
def __del__(self):
pass
def main():
t = threading.Thread(target=gc_worker)
t.start()
c = C()
cref = weakref.ref(c, callback)
del c
t.join()
main()
--
components: Interpreter Core
messages: 262242
nosy: Guo, Jiahua
priority: normal
severity: normal
status: open
title: Assertion failed in gc with __del__ and weakref
type: crash
versions: Python 3.4, Python 3.5
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<http://bugs.python.org/issue26617>
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