bug#17701: 24.4.50; rename-file gets error reading arguments

[Eli Zaretskii]

> Date: Thu, 05 Jun 2014 07:50:53 -0400
> From: Richard Stallman <rms@gnu.org>
> 
> 
> I type M-x rename-file RET foo.html RET
> and get an error "wrong type argument, string".
> 
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>   call-interactively(rename-file record nil)
>   command-execute(rename-file record)
>   execute-extended-command(nil "rename-file")
>   funcall-interactively(execute-extended-command nil "rename-file")
>   call-interactively(execute-extended-command nil nil)
>   command-execute(execute-extended-command)

Stefan, it looks like your commit in revision 117170
(monnier@iro.umontreal.ca-20140528000914-pdxhle8lheyhj254) is the root
cause.