New submission from Christian Tismer <tis...@stackless.com>:
By the new Py_TPFLAGS_METHOD_DESCRIPTOR flag, a new code path is
activated, and when extension types like PySide create a new
class, we observe negative refcounts.
The reason is that the code in typeobject.c fkt. type_mro_modified
calls lookup_maybe_method which returns a _borrowed_ reference.
This happens in the "if (custom) {" branch.
Removing all Py_XDECREF calls from the function fixes that.
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components: Extension Modules
messages: 358198
nosy: Christian.Tismer
priority: critical
severity: normal
status: open
title: Negative Refcount in Python 3.8
type: crash
versions: Python 3.8
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue39016>
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