[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3296: CentOS 7 CI job fails

[Tahoe-LAFS]

#3296: CentOS 7 CI job fails
---------------------------+---------------------------
 Reporter:  exarkun        |          Owner:
     Type:  defect         |         Status:  new
 Priority:  supercritical  |      Milestone:  undecided
Component:  unknown        |        Version:  n/a
 Keywords:                 |  Launchpad Bug:
---------------------------+---------------------------
 {{{
 Traceback (most recent call last):
   File "/tmp/tahoe-lafs.tox/py27-coverage/bin/tahoe", line 6, in <module>
     from allmydata.scripts.runner import run
   File "/tmp/tahoe-lafs.tox/py27-coverage/lib/python2.7/site-
 packages/allmydata/scripts/runner.py", line 9, in <module>
     from allmydata.version_checks import get_package_versions_string
   File "/tmp/tahoe-lafs.tox/py27-coverage/lib/python2.7/site-
 packages/allmydata/version_checks.py", line 399, in <module>
     _vers_and_locs_list, _cross_check_errors =
 _get_package_versions_and_locations()
   File "/tmp/tahoe-lafs.tox/py27-coverage/lib/python2.7/site-
 packages/allmydata/version_checks.py", line 356, in
 _get_package_versions_and_locations
     __import__(modulename)
   File "/tmp/tahoe-lafs.tox/py27-coverage/lib/python2.7/site-
 packages/wormhole/__init__.py", line 2, in <module>
     from .wormhole import create, __version__
   File "/tmp/tahoe-lafs.tox/py27-coverage/lib/python2.7/site-
 packages/wormhole/wormhole.py", line 11, in <module>
     from ._boss import Boss
   File "/tmp/tahoe-lafs.tox/py27-coverage/lib/python2.7/site-
 packages/wormhole/_boss.py", line 15, in <module>
     from ._dilation.manager import Dilator
   File "/tmp/tahoe-lafs.tox/py27-coverage/lib/python2.7/site-
 packages/wormhole/_dilation/manager.py", line 26, in <module>
     from .connector import Connector
   File "/tmp/tahoe-lafs.tox/py27-coverage/lib/python2.7/site-
 packages/wormhole/_dilation/connector.py", line 20, in <module>
     from .connection import DilatedConnectionProtocol, KCM
   File "/tmp/tahoe-lafs.tox/py27-coverage/lib/python2.7/site-
 packages/wormhole/_dilation/connection.py", line 13, in <module>
     from .encode import to_be4, from_be4
   File "/tmp/tahoe-lafs.tox/py27-coverage/lib/python2.7/site-
 packages/wormhole/_dilation/encode.py", line 4, in <module>
     assert len(struct.pack("<L", 0)) == 4
 TypeError: Struct() argument 1 must be string, not unicode
 }}}

 It looks like some kind of incompatibility between Python 2.7 and the
 latest release of magic-wormhole, I suppose.

 This turns CI red.

--
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3296>
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