Subject: bug#19463: 25.0.50; Files with special chars in the name cannot be written on MS Windows

From: Eli Zaretskii <[email-masked]>
Date: Mon, 29 Dec 2014 18:37:08 +0200

> From: Michael Albinus <[email-masked]>
> Date: Mon, 29 Dec 2014 16:56:48 +0100
> 
> 
> The following problem I have observed when running tramp-tests.el on MS
> Windows. It isn't a Tramp problem, 'tho.

It's a basic documented limitation of the file APIs, at least on the
level that Emacs on Windows uses them.  See

  http://msdn.microsoft.com/en-us/library/windows/desktop/aa365247%28v=vs.85%29.aspx

(look under "Naming Conventions").

> Files with special characters in their file name cannont be written
> locally. The following test is derived from tramp-test30-special-characters.
> Note, that this testcase runs w/o problems under GNU/Linux.

This is expected.  What exactly do you want us to do with this issue?
Unless we radically change the way we do file I/O (similarly to what
Cygwin does), which is a very large job, this issue cannot be
resolved.

We simply should not use such file names on Windows.