[New-bugs-announce] [issue28537] abc module fails to reject instantiation of some multiply-inheriting classes that fail to implement abstract methods

[Nathaniel Manista]

New submission from Nathaniel Manista:

The attached file when executed should fail (raise an exception) one line above where it actually does. Right?

I discovered this in 2.7 but have confirmed that it's still a problem in 3.6.0b2.

----------
components: Library (Lib)
files: abc_what.py
messages: 279465
nosy: Nathaniel Manista, aleax
priority: normal
severity: normal
status: open
title: abc module fails to reject instantiation of some multiply-inheriting classes that fail to implement abstract methods
type: behavior
versions: Python 2.7, Python 3.3, Python 3.4, Python 3.5, Python 3.6, Python 3.7
Added file: http://bugs.python.org/file45226/abc_what.py

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<http://bugs.python.org/issue28537>
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