Emacs: notmuch-mua-mail throws error if notmuch-fcc-dirs does not exist

[Felix Konstantin Maurer <maufl@maufl.de>]

Hi,

I had a problem where creating a reply from a message would not include
the quoted original body in the emacs notmuch client. I now found out
what the problem was.

What would happen:
From a search in notmuch, I would open a thread.
In the read I would hit "r" or "R" to reply.
A new buffer would open, containing all headers and the "--text .." line.
The headers included an FCC header to a non existing sent folder.
I would be asked whether I want to create that folder but would decline.
Then I would be in the message buffer but without a quoted body.

What seemed to be the problem:
In notmuch-mua-mail the message-mail function is called, which asked me
about the folder. When I declined to create the folder, it returned an
error "Message not sent".
The rest of notmuch-mua-mail was not executed anymore, and also the rest
of notmuch-mua-reply.

I fixed it by setting notmuch-fcc-dirs to nil.
This is good for me, but might bite somebody else at some point.

I'm quite new to emacs and don't know much elisp. I hope my findings are
correct.
Maybe somebody with more experience can confirm this problem and propose
a good fix.

Regards
Felix