Package: python3-notmuch
Version: 0.18-3
Severity: minor

If a message starts with the "From " postmark (i.e., it's in the mbox 
format), and you ask the get_header() method for a non-existent header, 
it raises NullPointerError, instead of returning empty string.

Now, I realize that support for indexing mbox files has been dropped, 
but users might still have them on disk, indexed by an old version of 
notmuch. This is how I discovered this bug.

I've attached my crafted mail archive (which I indexed with wheezy's 
notmuch), and the script that I used for testing:

$ python3 test.py
OK
NullPointerError()


-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.14-1-amd64 (SMP w/1 CPU core)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash

Versions of packages python3-notmuch depends on:
ii  libnotmuch3  0.18-3+b1

-- 
Jakub Wilk