Re: Emacs snapshot: free variable warning

[Dmitry Gutov]

Dmitry Gutov <dgutov@yandex.ru> writes:
> Joost Kremers <joostkremers@yahoo.com> writes:
>
>> Hi all,
>>
>> After a recent Emacs update (I'm following Damien Cassou's Emacs
>> snapshot packages at <https://launchpad.net/~cassou/+archive/emacs>) one
>> of my init files started giving me a free variable warning that I never
>> got before:
>>
>> ```
>> .emacs.d/mu4e-settings.el:Warning: reference to free variable
>>     `offlineimap-buffer-name'
>> ```
>>
>> The warning results from a defadvice:
>>
>> ```
>> (defadvice mu4e-quit (around jk-quit-offlineimap () activate)
>>   "Quit OfflineIMAP when quitting mu4e."
>>   (interactive)
>>   ad-do-it
>>   (signal-process (get-buffer-process (get-buffer offlineimap-buffer-name)) 
>> 'SIGUSR2))
>> ```
>>
>> If I comment out this defadvice, the warning goes away.
>>
>> Anyone know why I'm suddenly getting this warning? It's true that the
>> variable hasn't been defined yet when the code is loaded, but I have a
>> defun in the same file which also references this variable but doesn't
>> produce any warning. Besides, I'm used to getting warnings like this
>> when compiling code, but not when it's simply loaded...
>>
>> If it is intentional (and not some bug introduced with a recent change
>> to Emacs) is there a way to code the defadvice so that I don't get the
>> warning?
>
> Same here with autopair on Emacs trunk, compiled by myself:
>
> ```
> .emacs.d/elpa/autopair-20121120.2012/autopair.elc:Warning: reference to free
>     variable `autopair-mode'
> ```
>
> in *Compile-Log* on startup.
>
> Doesn't look like expected behavior.

http://debbugs.gnu.org/cgi/bugreport.cgi?bug=12965 seems to be it.