Re: nnir with notmuch gives error; sort: Wrong type argument: number-or-marker-p, nil

[xuqi]

physiculus <physiculus@gmail.com> writes:

> Eric Abrahamsen <eric@ericabrahamsen.net> writes:
>
> Hello,
>
> here is the output from the debugger.
> I dont know, what it mean, but i think you do :-)
>
> Hope it helps!
>
>
> Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
>   <(nil nil)
>   sort((nil) <)
>   nnir-retrieve-headers((1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
> 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
> 42 43 44 45 46 47 48 49 50 ...) "nnir-87zhckegiv.fsf" "nnir-ephemeral"
> nil)

A look at the source code of function `nnir-retrieve-headers' would
help. You can find the code by pressing C-h f RET nnir-retrieve-headers
and click `nnir.el' in the help buffer.

At the front of this function you will see a call to the function
`sort':

        (let* ((group-articles (pop articles-by-group))
               (artgroup (car group-articles))
               (articleids (cadr group-articles))
               (artlist (sort (mapcar 'cdr articleids) '<))
                         ~~~~
               (server (gnus-group-server artgroup))
               ...

The error message tells us that the 1st argument of `sort', (mapcar 'cdr
articleids) returns a list of nils. This involves a bunch of variables
and list operations, but by the documentation of `nnir-categorize' we
can infer that the structure of `group-articles' look like this:

    '((group1
        ((nnir-article-ids article11)
         (nnir-article-ids article12)
         ...))
      (group2
        ((nnir-article-ids article21)
         (nnir-article-ids article22)
         ...))
      (group3
        ...))

So `articleids' are this part: (nnir-article-ids article11)

and `artlist' should be a list like this '(article11 article12 article21
...)

In this case, the first argument to `nnir-categorize' may be nil, thus
article11 ... are all nils, so you get a list of nils.

The most likely reason therefore is that notmuch can't produce a list of
articles with your search conditions. I haven't used notmuch with gnus
so I can only provide a guess.

>   gnus-retrieve-headers((1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
> 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
> 42 43 44 45 46 47 48 49 50 ...) "nnir:nnir-87zhckegiv.fsf" nil)
>   gnus-cache-retrieve-headers((1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
> 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
> 40 41 42 43 44 45 46 47 48 49 50 ...) "nnir:nnir-87zhckegiv.fsf" nil)
>   gnus-retrieve-headers((1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
> 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
> 42 43 44 45 46 47 48 49 50 ...) "nnir:nnir-87zhckegiv.fsf" nil)
>   gnus-fetch-headers((1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 
> 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 
> 48 49 50 ...))
>   gnus-select-newsgroup("nnir:nnir-87zhckegiv.fsf" t nil)
>   gnus-summary-read-group-1("nnir:nnir-87zhckegiv.fsf" t t nil nil nil)
>   gnus-summary-read-group("nnir:nnir-87zhckegiv.fsf" t t nil nil nil nil)
>   gnus-group-read-group(t t "nnir:nnir-87zhckegiv.fsf" nil)
>   gnus-group-read-ephemeral-group("nnir-87zhckegiv.fsf" (nnir "nnir") nil nil 
> nil nil ((nnir-specs (nnir-query-spec (query . "hock")) (nnir-group-spec 
> ("nnmaildir:Lokal")))))
>   gnus-group-make-nnir-group(nil)
>   funcall-interactively(gnus-group-make-nnir-group nil)
>   call-interactively(gnus-group-make-nnir-group nil nil)
>   command-execute(gnus-group-make-nnir-group)
>
>> physiculus <physiculus@gmail.com> writes:
>>
>>> Hello,
>>> if i try to use search with notmuch my nnmaildir, i get the error above.
>>> here are the lines from messages:
>>> Opening nnir server on nnir-ephemeral...done
>>> Retrieving newsgroup: nnir:nnir-877dzp783m.fsf...
>>> Doing notmuch query Hock...
>>> notmuch args: search --format=text --output=files Hock
>>> Massaging notmuch output...done
>>> Fetching headers for nnir:nnir-877dzp783m.fsf...
>>> sort: Wrong type argument: number-or-marker-p, nil
>>
>> Can you run M-x toggle-debug-on-error, then trigger this error again,
>> and send the backtrace to the list?
>>
>> Thanks,
>> Eric
>>
>>
>> _______________________________________________
>> info-gnus-english mailing list
>> info-gnus-english@gnu.org
>> https://lists.gnu.org/mailman/listinfo/info-gnus-english
>
> _______________________________________________
> info-gnus-english mailing list
> info-gnus-english@gnu.org
> https://lists.gnu.org/mailman/listinfo/info-gnus-english