[Jython-bugs] [issue2560] StackOverflowError with multiple inheritance, metaclasses, and __isinstancecheck__

[Ryan <re...@bu...>]

New submission from Ryan:

class A(type): pass

class B(type):
    def __instancecheck__(): pass

class C(A, B): pass

print(isinstance(object(), C))


gives:


Traceback (most recent call last):
  File "tst.py", line 8, in <module>
    print(isinstance(object(), C))
RuntimeError: maximum recursion depth exceeded (Java StackOverflowError)


Originally reported as https://github.com/python/typing/issues/395.

----------
messages: 11148
nosy: refi64
severity: normal
status: open
title: StackOverflowError with multiple inheritance, metaclasses, and __isinstancecheck__
type: behaviour
versions: Jython 2.7

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Jython tracker <re...@bu...>
<http://bugs.jython.org/issue2560>
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