[issue27729] Provide a better error message when the file path is too long on Windows

[Steve Dower]

Steve Dower added the comment:

See https://github.com/pypa/pip/issues/3055 for an example of this error.

(Also note that there is a path limit of ~32k with the prefix, and that using it also disables a lot of standard path resolution algorithms, so simply adding it everywhere does not fix anything.)

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27729>
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