[Bug 30511] New: Guild Wars 2 launcher crashes with "assertion m_ioCount failed"

http://bugs.winehq.org/show_bug.cgi?id=30511

Bug #: 30511
           Summary: Guild Wars 2 launcher crashes with "assertion
                    m_ioCount failed"
           Product: Wine
           Version: 1.5.2
          Platform: x86
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
    Classification: Unclassified

Created attachment 39906
  --> http://bugs.winehq.org/attachment.cgi?id=39906
launcher crash log

After downloading around 1GB of data, the Guild Wars 2 launcher crashes with
"assertion: m_ioCount". I can restart the launcher and it picks up from where
it left off, so eventually it does finish. A crash log from the game is
attached.

I've also seen this crash very infrequently on the login screen. The beta
hasn't started yet so I don't know if the crash occurs ingame as well.