Simon Josefsson <jas@extundo.com> writes:

> "Vladimir Volovich" <vvv@vsu.ru> writes:
>
>> using the latest gnus from cvs, i get the following error when trying to
>> view the attached (spam) message:
>>
>> Debugger entered--Lisp error: (args-out-of-range 650 650)
>>   mm-decode-coding-region(650 650 koi8-r)
>>   mail-decode-encoded-word-region(1 883)
>
> This seems to fix it, but someone familiar with rfc2047.el better check.

I think this change is the culprit:

,----
| 2003-05-02  Dave Love  <fx@gnu.org>
| 
| 	* rfc2047.el (rfc2047-q-encode-region, rfc2047-decode): Use
| 	mm-with-unibyte-current-buffer.
`----

I.e. `mm-with-unibyte-current-buffer-mule4' was changed to
`mm-with-unibyte-current-buffer' which isn't equivalent -- the latter
makes the current buffer unibyte which the former doesn't in Mule > 4.

This patch fixes it.  But I never understood what the mule4 stuff was
about, so it might break on Emacsen that use that.  

Which Emacs versions use Mule version 4, by the way?  Maybe we don't
need to support it anymore?