[issue24115] PyObject_IsInstance() and PyObject_IsSubclass() can fail

[Serhiy Storchaka]

New submission from Serhiy Storchaka:

PyObject_IsInstance() and PyObject_IsSubclass() cat return 0, 1, or -1. But some code use "if (PyObject_IsInstance(...))" or "if (!PyObject_IsInstance(...))". This should be fixed.

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assignee: serhiy.storchaka
components: Extension Modules, Interpreter Core
messages: 242407
nosy: serhiy.storchaka
priority: normal
severity: normal
stage: needs patch
status: open
title: PyObject_IsInstance() and PyObject_IsSubclass() can fail
type: behavior
versions: Python 2.7, Python 3.4, Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24115>
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