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[Timo Jyrinki <1612767@xxxxxxxxxxxxxxxxxx>]

Ok the crash goes away indeed with a rebuild, thanks! That should be
fine.

Can you elaborate a bit how the global menus would be supposed to be
working with these patches when running Qt applications under Unity 7
environment? I can actually see that for whatever reason current yakkety
doesn't have those working even without landing-034 PPA, so the appmenu-
qt5 seems to have become broken regardless right now.

New bugs should probably be filed for any next actions, whether in Unity
itself or elsewhere.

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https://bugs.launchpad.net/bugs/1612767

Title:
  Drop appmenu-qt5 from default installations

Status in indicator-appmenu package in Ubuntu:
  New
Status in qtbase-opensource-src package in Ubuntu:
  New

Bug description:
  Currently we are using appmenu-qt5 as our platform theme on desktop,
  however it has many disadvantages, which make me want to get rid of
  it:

  1) Its design is a hack: instead of the using normal QPA API for
  getting the menu, it retrieves the menu bar using QWidget::findChild,
  and then casts the pointer to QMenu*. The normal methods (which are
  getting called by Qt) remain empty stubs.

  2) It is preventing applications from using GTK+ theme integration,
  such as dialogs (I reported this as bug 1378935, but there is no easy
  way to fix that).

  3) It is not working with Qt Quick applications (because it expects a
  QtWidgets window; see also bug 1323853). The standard implementation
  will work with i.e. Qt Quick Controls 2 using apps (implemented in
  https://codereview.qt-project.org/142733).

  4) It breaks other environments such as Plasma when installed: see bug
  1434516.

  5) Finally, it is mostly unmaintained: most patches since 2014 are
  authored by me, however I see no point continuing to develop that
  code.

  Recently, Shawn Rutledge and I have written a native implementation of
  what appmenu-qt5 provides (global menu and system tray), which is part
  of Qt. That code uses the normal API, is well maintained, and works
  better than appmenu-qt5 (or at least not worse).

  So I propose to drop appmenu-qt5 from default Ubuntu installations,
  and maybe later from archive too.

  Unfortunately we use Qt 5.6, and some of the needed patches are only
  in Qt 5.7, so I would like to backport them to our packaging:

  https://code.qt.io/cgit/qt/qtbase.git/commit/?id=f199bb9133fe0446 (will be in 5.6.2 / 5.7.0)
  https://code.qt.io/cgit/qt/qtbase.git/commit/?id=488cf78e44947eff (will be in 5.7.0)
  https://code.qt.io/cgit/qt/qtbase.git/commit/?id=b6a824d0a3b4fabd (will be in 5.7.0)
  https://code.qt.io/cgit/qt/qtbase.git/commit/?id=e4d79e1fdeb6b26b (will be in 5.7.0)

  Timo: if you have no objections, I will commit those patches to the
  packaging Git.

  After we do that, I will remove the appmenu-qt5 recommendation from
  indicator-appmenu (that is the only package referring to it).

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