[tor-bugs] #23503 [Core Tor/Chutney]: AttributeError: 'NoneType' object has no attribute 'startswith'

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#23503: AttributeError: 'NoneType' object has no attribute 'startswith'
----------------------------------+--------------------
     Reporter:  dgoulet           |      Owner:  (none)
         Type:  defect            |     Status:  new
     Priority:  High              |  Milestone:
    Component:  Core Tor/Chutney  |    Version:
     Severity:  Normal            |   Keywords:
Actual Points:                    |  Parent ID:
       Points:                    |   Reviewer:
      Sponsor:                    |
----------------------------------+--------------------
 Chutney latest master 99b7c5e8e8e063af doesn't work for me and explodes
 with:

 {{{
 Traceback (most recent call last):
   File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
     "__main__", fname, loader, pkg_name)
   File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
     exec code in run_globals
   File "/home/dgoulet/git/chutney/lib/chutney/TorNet.py", line 1161, in
 <module>
     sys.exit(main())
   File "/home/dgoulet/git/chutney/lib/chutney/TorNet.py", line 1155, in
 main
     result = runConfigFile(args['action'], f)
   File "/home/dgoulet/git/chutney/lib/chutney/TorNet.py", line 1131, in
 runConfigFile
     return getattr(network, verb)()
   File "/home/dgoulet/git/chutney/lib/chutney/TorNet.py", line 990, in
 configure
     self._checkConfig()
   File "/home/dgoulet/git/chutney/lib/chutney/TorNet.py", line 982, in
 _checkConfig
     n.getBuilder().checkConfig(self)
   File "/home/dgoulet/git/chutney/lib/chutney/TorNet.py", line 352, in
 checkConfig
     self._createTorrcFile(checkOnly=True)
   File "/home/dgoulet/git/chutney/lib/chutney/TorNet.py", line 272, in
 _createTorrcFile
     output = torrc_template.format(self._env)
   File "/home/dgoulet/git/chutney/lib/chutney/Templating.py", line 361, in
 format
     v = _BetterTemplate(orig_val).substitute(values)
   File "/usr/lib/python2.7/string.py", line 176, in substitute
     return self.pattern.sub(convert, self.template)
   File "/usr/lib/python2.7/string.py", line 166, in convert
     val = mapping[named]
   File "/home/dgoulet/git/chutney/lib/chutney/Templating.py", line 111, in
 __getitem__
     return self.lookup(key, self)
   File "/home/dgoulet/git/chutney/lib/chutney/Templating.py", line 135, in
 lookup
     return lookup(key, my)
   File "/home/dgoulet/git/chutney/lib/chutney/Templating.py", line 120, in
 lookup
     return self._getitem(key, my)
   File "/home/dgoulet/git/chutney/lib/chutney/Templating.py", line 216, in
 _getitem
     rv = fn(my)
   File "/home/dgoulet/git/chutney/lib/chutney/TorNet.py", line 897, in
 _get_server_dns_resolv_conf
     dns_conf = os.path.abspath(my['dns_conf'])
   File "/usr/lib/python2.7/posixpath.py", line 360, in abspath
     if not isabs(path):
   File "/usr/lib/python2.7/posixpath.py", line 54, in isabs
     return s.startswith('/')
 AttributeError: 'NoneType' object has no attribute 'startswith'
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23503>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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