New issue 2629: SIGSEGV when mistyping __del__ for __delete__ in a property
https://bitbucket.org/pypy/pypy/issues/2629/sigsegv-when-mistyping-__del__-for
Artur Siekielski:
The following code results in SIGSEGV (PyPy 5.8.0, Linux). Note that a property
should define __delete__, not __del__. CPython gives a proper message.
```
#!python
undefined = object()
class cached_property(property):
def __init__(self, func):
self.__name__ = func.__name__
self.__module__ = func.__module__
self.__doc__ = func.__doc__
self.func = func
def __set__(self, obj, value):
obj.__dict__[self.__name__] = value
def __get__(self, obj, type=None):
if obj is None:
return self
value = obj.__dict__.get(self.__name__, undefined)
if value is undefined:
value = self.func(obj)
obj.__dict__[self.__name__] = value
return value
def __del__(self, obj):
print '__del__'
class A(object):
@cached_property
def f(self):
return 1
a = A()
del a.f
```
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