[issue18244] singledispatch: When virtual-inheriting ABCs at distinct points in MRO, composed MRO is dependent on haystack ordering

[Łukasz Langa]

Łukasz Langa added the comment:

Here's an improved patch which doesn't copy data between lists in `_c3_mro()` so much.

----------
Added file: http://bugs.python.org/file30735/issue18244.diff

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18244>
_______________________________________