AttributeError propagation is broken in cached_property with slots=True #1230
Description
Let's start with a regular class:
class A:
@cached_property
def x(self):
return self.y
@property
def y(self):
raise AttributeError("Message")
a = A()
print(a.x) # AttributeError: MessageJust as expected. Now let's use attrs with __dict__:
@define(slots=False)
class A:
...
print(a.x) # AttributeError: MessageSo far so good. But:
@define # slots=True by default
class A:
...
print(a.x) # AttributeError: 'A' object has no attribute 'y'This made me spend quite some time wondering where did my attribute go :)