Bug#810947: kwin-x11: iceweasel locks up when multiple windows restored

[Arthur Marsh <arthur.marsh@internode.on.net>]

Package: kwin-x11
Version: 4:5.5.4-2
Followup-For: Bug #810947

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?

After latest updates in unstable, had 3 attempts now in a row of logging into
a plasma session, restarting iceweasel and experiencing a kwin_x11 lock-up.

Currently using Plastik window decoration theme, will test with org.kde.breeze next.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?
   * What was the outcome of this action?
   * What outcome did you expect instead?

*** End of the template - remove these template lines ***


-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.5.0-rc6+ (SMP w/4 CPU cores)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Init: sysvinit (via /sbin/init)

Versions of packages kwin-x11 depends on:
ii  kwin-common          4:5.5.4-2
ii  libc6                2.21-9
ii  libkf5i18n5          5.16.0-1
ii  libkf5windowsystem5  5.16.0-1
ii  libqt5core5a         5.5.1+dfsg-14
ii  libqt5gui5           5.5.1+dfsg-14
ii  libqt5widgets5       5.5.1+dfsg-14
ii  libqt5x11extras5     5.5.1-3
ii  libstdc++6           6-20160220-1
ii  libxcb1              1.11.1-1

kwin-x11 recommends no packages.

kwin-x11 suggests no packages.

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