Re: Errors after upgrade to 0.14

["Bart Bunting" <bart@ursys.com.au>]

Hi Austin,

I applied the patch and this error was from after that.

The way it was triggered was by hitting 'a' to archive a message in the
search view.

From what I can tell it's just the xapian error and there is nothing
about json.  Hope it means more to you.

Debugger entered--Lisp error: (error "A Xapian exception occurred opening database: Unable to get write lock on /Users/bart/mail/.notmuch/xapian: already locked")
  ad-Orig-signal(error ("A Xapian exception occurred opening database: Unable to get write lock on /Users/bart/mail/.notmuch/xapian: already locked"))
  signal(error ("A Xapian exception occurred opening database: Unable to get write lock on /Users/bart/mail/.notmuch/xapian: already locked"))
  ad-Orig-error("A Xapian exception occurred opening database: Unable to get write lock on /Users/bart/mail/.notmuch/xapian: already locked")
  apply(ad-Orig-error "A Xapian exception occurred opening database: Unable to get write lock on /Users/bart/mail/.notmuch/xapian: already locked")
  error("A Xapian exception occurred opening database: Unable to get write lock on /Users/bart/mail/.notmuch/xapian: already locked")
  notmuch-call-notmuch-process("tag" "-inbox" "--" "thread:00000000000225c8")
  apply(notmuch-call-notmuch-process "tag" ("-inbox" "--" "thread:00000000000225c8"))
  notmuch-tag("thread:00000000000225c8" ("-inbox"))
  notmuch-search-tag-region(800 800 ("-inbox"))
  notmuch-search-tag(("-inbox"))
  ad-Orig-notmuch-search-archive-thread()
  notmuch-search-archive-thread()
  call-interactively(notmuch-search-archive-thread nil nil)


Kind regards

Austin Clements <amdragon@MIT.EDU> writes:

> Quoth myself on Aug 22 at  8:41 pm:
>> Quoth Bart Bunting on Aug 23 at  9:36 am:
>> > Good morning,
>> > 
>> > After upgrading to notmuch 014 I am seeing the following messages appear
>> > in the messages buffer.
>> > 
>> > error in process filter: byte-code: Wrong type argument: number-or-marker-p, nil
>> > error in process filter: Wrong type argument: number-or-marker-p, nil
>> > 
>> > I am also getting a repeating message in the minibuffer (I think) which
>> > says something like "json read tail error".  Sorry that I am not more
>> > specific as I use emacspeak and this message appears to repeat many
>> > times interupting speech so I am not 100% sure of what it exactly says.
>> 
>> This is probably "json-readtable-error", which is, unfortunately,
>> about the most generic error the JSON parser can give.
>> 
>> > My gut feeling is that it is happening when notmuch is updating the
>> > database or something.
>> > 
>> > Is this expected behaviour?  It is particularly annoying for me as it
>> > sends the speech synth crazy and crashes it for a period of about 30
>> > seconds.
>> > 
>> > If it is expected then I will try and find a way to prevent emacspeak
>> > from trying to read it.
>> 
>> This is definitely not expected behavior.  Does this happen when
>> you're searching for messages or when you're viewing a thread?  Can
>> you give any more details on what you're doing when you get this
>> error?
>> 
>> Try doing M-x toggle-debug-on-error and then triggering the error.
>> Hopefully Emacs will give you a buffer with a backtrace that will give
>> us a better idea of where this is happening.
>
> Actually, I might know what's going on here.  Based on your suspicion
> about notmuch updating the database and assuming that this happens in
> the search buffer, I think the parser error recovery code is leaving
> the parser in a slightly invalid state, which causes the next
> invocation to think it can consume more data when there is no more
> data to consume.  I would expect that to give at most one readtable
> error, but maybe there's something I'm overlooking.
>
> Could you try the following one line patch?
>
> diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el
> index 900235b..a09c0f6 100644
> --- a/emacs/notmuch-lib.el
> +++ b/emacs/notmuch-lib.el
> @@ -375,7 +375,7 @@ resynchronize after an error by moving point."
>  
>    (if (eq (notmuch-json-next jp) 'value)
>        ;; We're already at a value
> -      nil
> +      (if (eobp) 'retry nil)
>      ;; Drive the state toward 'expect-value
>      (skip-chars-forward " \t\r\n")
>      (or (when (eobp) 'retry)
>
Bart
-- 
Bart Bunting - Engineering Manager - URSYS
459-461 Parramatta Rd. Leichhardt  NSW  2040  Australia
Ph:           +61 2 8745 2811
Mbl:          0409 560 005