Failing to self replace

[zekronium]

Occurs on windows:
IoError: Incorrect function. (os error 1)

Context:

OS Name:	Microsoft Windows Server 2016 Standard Evaluation
Version:	10.0.14393 Build 14393

[mitsuhiko]

Unfortunately I cannot reproduce this. If this problem still exists, please see if you can provide additional information about where the binary is placed, what the permissions on the file are, what the permissions of the parent folder are and what the drive letters are that are available.