Re: Timer out of nowhere

[Michael Heerdegen <michael_heerdegen@web.de>]

Lluís <xscript@gmx.net> writes:

> Every once in a while, I get this error:
>
> Debugger entered--Lisp error: (error "Selecting deleted buffer")
>   adict-guess-dictionary-maybe(#<killed buffer>)
>   apply(adict-guess-dictionary-maybe #<killed buffer>)
>   byte-code("r\301\b\302H\b\303H\"\210)\301\207" [timer apply 5 6] 4)
>   timer-event-handler([t 0 2 0 t adict-guess-dictionary-maybe
> (#<killed buffer>) idle 0])
>
> This is from [1].

Yes, I see the same since I've upgraded my emacs.

> The strange part is that I just killed every possible buffer (in case
> it was a local timer on any of them), and `timer-list' shows
> absolutely no entry with `adict-guess-dictionary-maybe'.

It's in `timer-idle-list'.

> Any ideas on how to track this problem?

It's a bug in auto-dictionary.  I guess that in prior Emacs version, the
problem was also there, but just no message was raised.

Anyway, once `auto-dictionary-mode' calls `run-with-idle-timer', the
timer stays in `timer-idle-list' even after its buffer has been killed.

I think this is not hard to fix.  The timer runs
`adict-guess-dictionary-maybe'.  This function should just check if the
BUFFER argument is `buffer-live-p'.  If it is not, it just has to cancel
`adict-timer'.


Regards,

Michael.