opening mail "crashes" alot

[josch]

Hi,

I just received the following spam (encoded in base64 to make sure it reaches you byte by byte the same):

UmV0dXJuLVBhdGg6IHJqbkBjYXBzLmFtClJlY2VpdmVkOiAgZnJvbSBzY2kuYW0gKFs1LjE5OS4x
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Ly8zWWVsakVnUmh0c2kKIE8wQ1BvZUFGa1g2Sm9wSkh5NnFsSVA0MjBkaDFRZktXT2VnVW9hQ2w5
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The decoded data is has an md5sum of 8248c9c326482cd808ab77b336f6100d

When I try to open the thread containing this message in alot (I'm running the master branch) then I get the following error:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "alot/init.py", line 187, in main
    UI(dbman, cmd)
  File "alot/ui.py", line 85, in __init__
    self.mainloop.run()
  File "/usr/lib/python2.7/dist-packages/urwid/main_loop.py", line 272, in run
    self.screen.run_wrapper(self._run)
  File "/usr/lib/python2.7/dist-packages/urwid/raw_display.py", line 242, in run_wrapper
    return fn()
  File "/usr/lib/python2.7/dist-packages/urwid/main_loop.py", line 337, in _run 
    self.event_loop.run()
  File "/usr/lib/python2.7/dist-packages/urwid/main_loop.py", line 1256, in wrapper
    rval = f(*args,**kargs)
  File "/usr/lib/python2.7/dist-packages/urwid/main_loop.py", line 1184, in _twisted_idle_callback
    callback()
  File "/usr/lib/python2.7/dist-packages/urwid/main_loop.py", line 549, in entering_idle
    self.draw_screen()
  File "/usr/lib/python2.7/dist-packages/urwid/main_loop.py", line 563, in draw_screen
    canvas = self._topmost_widget.render(self.screen_size, focus=True)
  File "/usr/lib/python2.7/dist-packages/urwid/widget.py", line 141, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib/python2.7/dist-packages/urwid/decoration.py", line 225, in render
    canv = self._original_widget.render(size, focus=focus)
  File "/usr/lib/python2.7/dist-packages/urwid/widget.py", line 141, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib/python2.7/dist-packages/urwid/container.py", line 1058, in render
    focus and self.focus_part == 'body')
  File "alot/buffers.py", line 407, in render
    return self.body.render(size, focus)
  File "/usr/lib/python2.7/dist-packages/urwid/widget.py", line 141, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib/python2.7/dist-packages/urwid/widget.py", line 1751, in render 
    canv = get_delegate(self).render(size, focus=focus)
  File "/usr/lib/python2.7/dist-packages/urwid/widget.py", line 141, in cached_render
    canv = fn(self, size, focus=focus)
  File "/usr/lib/python2.7/dist-packages/urwid/listbox.py", line 457, in render 
    (maxcol, maxrow), focus=focus)
  File "/usr/lib/python2.7/dist-packages/urwid/listbox.py", line 402, in calculate_visible
    next, pos = self.body.get_next( pos )
  File "alot/foreign/urwidtrees/widgets.py", line 80, in get_next
    return self._get(self._tree.next_position(pos))
  File "alot/foreign/urwidtrees/widgets.py", line 67, in _get
    res = self[pos], pos
  File "alot/foreign/urwidtrees/lru_cache.py", line 102, in wrapper
    result = user_function(*args, **kwds)
  File "alot/foreign/urwidtrees/widgets.py", line 53, in __getitem__
    entry = self._tree.get_decorated(pos)
  File "alot/foreign/urwidtrees/nested.py", line 86, in get_decorated
    return self._get_decorated_entry(self._tree, pos)
  File "alot/foreign/urwidtrees/nested.py", line 82, in _get_decorated_entry
    entry = tree.decorate(pos[0], entry, is_first=isf)
  File "alot/foreign/urwidtrees/decoration.py", line 475, in decorate
    line = urwid.Columns(cols, box_columns=range(len(cols))[:-1])
  File "/usr/lib/python2.7/dist-packages/urwid/container.py", line 1736, in __init__
    if focus_column is None and w.selectable():
AttributeError: 'NoneType' object has no attribute 'selectable'

[pazz]

Can you confirm that you meet the requirements regarding the urwid version?

[josch]

Hi, my alot setup.py says urwid (>=1.1.0) is required. My python-urwid version is:

$ dpkg -l | grep urwid
ii  python-urwid                          1.1.1-1                              amd64        curses-based UI/widget library for Python

[pazz]

maybe you have an older version installed locally? what does

python -c "import urwid; print urwid.__version__"

say?

[josch]

alot is one of the only two pieces of software I'm using which I have not installed through my package manager so this would be unlikely. Anyways, here the output:

$ python -c "import urwid; print urwid.__version__"
1.1.1

[pazz]

Thanks. Do you see anything out of the ordinary in this mail? (how do i quickly import this base64 encoded blob for debugging?)

[josch]

Not really.

Here is the email in plaintext copypasted:

Return-Path: rjn@caps.am
Received:  from sci.am ([5.199.197.156]) by mx-ha.web.de (mxweb109) with ESMTP
 (Nemesis) id 0Lex9v-1VzB5O3orv-00qn9y for <j.schauer@web.de>; Tue, 05 Nov
 2013 09:05:54 +0100
Received: by localhost; Tue, 05 Nov 2013 09:02:22 +0100
ujq hld
From: "Annika Koch" <rjn@caps.am>
Reply-To: "Annika Koch" <rjn@caps.am>
To: okiki@web.de
Subject: Kredit bis 100 000 Euro auch ohne Schufa
Date: Tue, 05 Nov 2013 11:00:22 +0300
Content-Transfer-Encoding: 7Bit
Content-Type: text/plain;
X-Antivirus: avast! (VPS 131020-0, 20.10.2013), Outbound message
X-Antivirus-Status: Clean
Envelope-To: <j.schauer@web.de>
X-UI-Filterresults: unknown:5;V01:K0:rEf3eBZNaXk=:m8pXTm2feE/iWJH4FexDiarJYy
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 q5GjSQKDmpoSY0KofXxR4TwAWtXKalR5

Guten Tag,

SofortKredit von 2000 bis zu 100 000 Euro

Auch ohne Schufa möglich!

Besuchen Sie unsere Webseite unter:

www.akredit9.com

News abmelden

www.akredit9.com/asm

I encode/decode base64 using the base64 program which is part of the coreutils package in Debian/Ubuntu/Mint.

Otherwise any web based encode/decoder will do the same job. I just wanted to avoid any mangling with the text by github.

[sjackso]

I see a line of unindented cruft within the headers:

...
Received: by localhost; Tue, 05 Nov 2013 09:02:22 +0100
ujq hld
From: "Annika Koch" <rjn@caps.am>
...

I have done no tests myself, but perhaps this is a source of trouble?

[pazz]

yes, this is certainly a malformed mail because of this string ujq hld in line 6. I imported the base64 encoded mail to my local notmuch index and for me, alot does not die when i open this thread. In thread mode, it shows the one message, with Annika Koch (08:00am) as summary and considers the whole mail as body text from line 6 onwards.

My guess is that we have different versions of notmuch running, mine (master, HEAD: 48f2b3f1bc279f61b78d2cb4b19e8b05e607b125) being less strict than yours. It seems that in my case, libnotmuch extracts the value for the From header from this mail, although the corresponding line is only after the gibberish in line 6. I suspect that in your case, notmuch did not extract this value, resulting in a message for which the indexed From-value is None. I would not be surprised if such a scenario causes trouble for alot.

Could you upgrade notmuch and bindings to current upstream versions and re-index? Does this fix the issue? Otherwise, we'll need to cook up a code snipped to verify my guess :)