id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
20486	file_move_safe doesn't respect it's docstring	Ioan Alexandru Cucu	Kamu	"django.core.files.move.file_move_safe's docstring states the following:

    If the destination file exists and ``allow_overwrite`` is ``False``, this
    function will throw an ``IOError``.

However, if the destination file exists and movement is performed using os.rename (which is the case most of the times) then no exception is being thrown. The exception is only being thrown if streaming manually from one file to another.

This could be fixed by doing one of the following:
1. update the docstring to match the actual behavior
2. make the function raise IOError regardless of how the movement is being performed"	Bug	closed	File uploads/storage	dev	Normal	fixed		Kamu	Accepted	1	0	0	0	1	0