[issue29416] Path.mkdir can get into a recursive error loop

Changes by Dan Buchoff <d...@digilabs.io>: -- type: -> behavior ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29416> ___ ___

[issue29416] Path.mkdir can get into a recursive error loop

New submission from Dan Buchoff: If a path has a non-existent anchor, Path.mkdir can get into a RecursionError as it tries to recursively create the parent. I expect a more sane error. This is readily reproducible in Windows with `Path('Z:').mkdir(parents=True)` Example execution: Python