Subject: Re: bug#23743: 24.5; Opening output file: invalid argument, .../foo-<-4-n.el

From: Noam Postavsky <[email-masked]>
Date: Mon, 20 Jun 2016 23:15:07 -0400

On Fri, Jun 10, 2016 at 3:04 PM, Eli Zaretskii <[email-masked]> wrote:
>> Date: Fri, 10 Jun 2016 10:35:54 -0700 (PDT)
>> From: Drew Adams <[email-masked]>
>>
>> Apparently it doesn't like `<' in a file name?
>
> Yes, Windows doesn't allow that.
>
>> If so, and if that is "normal", then the user should get a much
>> better error message than this.
>
> That's the error that comes from the filesystem, Emacs doesn't know
> any better.

Right, cf https://support.microsoft.com/en-us/kb/177506

Is it worth blocking this sort of file name in read-file-name, or
should we just mark this wontfix?