[GHC] #10927: IndexError: pop from empty list

[GHC]

#10927: IndexError: pop from empty list
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        Reporter:  schwab            |                Owner:  hvr
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Trac & Git        |              Version:
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by thomie):

 To reproduce:

 * go to preferences, and change the language to German:
 https://ghc.haskell.org/trac/ghc/prefs
 * try to attach an attachment to a ticket
 * You will get the 'IndexError: pop from empty list' error

 Workaround: keep the default language.

 Upstream ticket: http://trac.edgewall.org/ticket/11184

 Cause: bug in Genshi library, versions 0.6.1 and 0.7.0 (they are
 maintaining 0.6.x and 0.7.x release lines in parallel).

 Solution: downgrade to Genshi version 0.6 (versions 0.6.2 and 0.7.1 are
 not released yet)

 How: `sudo easy_install Genshi==0.6`

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10927#comment:1>
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