Subject: bug#6299: In read-file-name: (args-out-of-range "c:" 0 3)

From: Stefan Monnier <[email-masked]>
Date: Sat, 29 May 2010 17:18:15 -0400

> Debugger entered--Lisp error: (args-out-of-range "c:" 0 3)
>   signal(args-out-of-range ("c:" 0 3))
>   completion--some(#[(style) " 	\236A@\n \f
> $\207" [style completion-styles-alist string table pred point] 5]
> (basic partial-completion emacs22))

First thing: edit completion--some o as to replace condition-case with
condition-case-no-debug.  This way the error won't be delayed and you'll
get a more precise backtrace.

        Stefan