[issue22107] tempfile module misinterprets access denied error on Windows

[Roger Upole]

New submission from Roger Upole:

_mkstemp_inner assumes that an access denied error means that it
has generated a filename that matches an existing foldername.
However, in the case of a folder for which you don't have permissions to
create a file, this means it will loop thru the maximum possible number of files.
This causes it to hang for several seconds and eventually return a bogus
FileExistsError.

Similar behaviour exists in 2.7.7, but it throws an IOError instead.

http://bugs.python.org/issue18849 seems to be where this was introduced.

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components: Windows
messages: 224304
nosy: rupole
priority: normal
severity: normal
status: open
title: tempfile module misinterprets access denied error on Windows
versions: Python 2.7, Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22107>
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