wrong type argument char-or-string-p when moving from notmuch 0.5 to 0.6 or 0.7

[Austin Clements]

On Sun, Aug 7, 2011 at 5:27 AM, daudi <dw at davidwhiting.me.uk> wrote:
> Hi,
>
> With notmuch 0.5 installed and emacs 23.2.1 I can search, show and read
> results fine. With notmuch 0.6 or 0.7 in emacs I can search and get a list
> of results, but when I try to view a result I only see the message headers.
> In the messages buffer I get:
>
> notmuch-show-insert-part-*/*: Wrong type argument: char-or-string-p,
> ((:content-type "text/html" :id 2) (:filename "report_en.pdf" :content-type
> "application/octet-stream" :id 3)) [2 times]
>
> If I switch back to 0.5 everything is fine. Is there something I need to
> configure in emacs to get 0.6 or 0.7 to work?
>
> Thanks.

Did you restart Emacs after upgrading?  The JSON interchange format
tends to change between versions, so the Elisp version has to match
the version of the notmuch binary you're running.  (There have been
rumblings of versioning the JSON output, but nothing's happened on
that front yet.)