[issue30473] defaultdict raises SystemError, __missing__ returned NULL in thread

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

In 3.6 _PyStack_UnpackDict() returns just args if there are no keyword arguments. But if args is NULL, the result of _PyStack_UnpackDict() is treated as error.

Thank you for the reproducer Louie!

----------
assignee:  -> haypo
components: +Interpreter Core
nosy: +serhiy.storchaka
priority: normal -> critical
stage:  -> needs patch

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30473>
_______________________________________