Hi,
I ran into a bug where a python object was deleted in the middle of a
function that was using it because a callback decref'd the one and only
reference to the object. This doesn't happen with python bytecode
because ref counts of the callable and of all args are essentially
incref'd before the call and then decref'd after. Doing the same in
Cython generated C code might be the way to fix this.
The pure python mode code below reproduces the crash with cython 0.23
when compiled to C and the Crash function called.
Thanks,
John
import cython
@cython.cclass
class Record:
cython.declare(ref=object)
def setref(self, ref):
self.ref = ref
GLOBAL_RECORD = Record()
@cython.cclass
class CrashCls:
def method(self):
cython.declare(rec=Record)
rec = GLOBAL_RECORD
print id(self)
rec.ref = None
assert isinstance(self, CrashCls) # <-- should crash
def Crash():
cython.declare(rec=Record)
rec = GLOBAL_RECORD
o = CrashCls()
rec.ref = o.method
del o
args = ()
rec.ref(*args)
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