desktop-packages team mailing list archive

[James Henstridge <james.henstridge@xxxxxxxxxxxxx>]

This sounds a lot like bug 1422304, by the look of it.

Both QtDBus and dbus-cpp make use of libdbus.  Libdbus provides a
dbus_shutdown() function that will release various internal global
state, which can be used to remove those allocation from the report
valgrind produces when analysing your program.  Normally applications
shouldn't have a need to call it.

Anything allocated (connections, method calls, etc) before the call to
shutdown can not be used after the call, which is what the
_dbus_current_generation assertions are about.

dbus-cpp makes a call to dbus_shutdown() as an atexit handler.
Unfortunately, Qt hasn't cleaned up its connections at this time,
leading to errors.

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https://bugs.launchpad.net/bugs/1526877

Title:
  Dbus errors in the console when closing the music-app

Status in Ubuntu Music App:
  New
Status in dbus-cpp package in Ubuntu:
  New
Status in media-hub package in Ubuntu:
  New
Status in dbus-cpp package in Ubuntu RTM:
  New
Status in media-hub package in Ubuntu RTM:
  New

Bug description:
  Due to bug 1434584 being fixed when you swipe to close an application
  the following appears in the log, note the dbus errors, and that I am
  not able to reproduce this on the desktop.

  
  ** Application is now inactive
  Attempted to deliver an event to a non-existent window, ignoring.
  virtual bool QMediaPlaylist::setMediaObject(QMediaObject*)
  void QMediaPlaylistPrivate::syncControls(QMediaPlaylistControl*, QMediaPlaylistControl*)
  void AalMediaPlayerService::deletePlaylistControl()
  virtual AalMediaPlaylistProvider::~AalMediaPlaylistProvider()
  void AalMediaPlaylistProvider::disconnect_signals()
  virtual AalMediaPlaylistControl::~AalMediaPlaylistControl()
  void AalMediaPlayerService::deleteMediaPlayerControl()
  void AalMediaPlayerService::destroyPlayerSession()
  PlaybackStatusChanged signal arrived via the bus (Status: PlaybackStatus::ready)
  PlaybackStatusChanged signal arrived via the bus (Status: PlaybackStatus::stopped)
  OnTrackListReset signal arrived via the bus.
  Attempted to unregister path (path[0] = com path[1] = canonical) which isn't registered
  process 6617: arguments to dbus_connection_close() were incorrect, assertion "connection->generation == _dbus_current_generation" failed in file ../../dbus/dbus-connection.c line 2935.
  This is normally a bug in some application using the D-Bus library.
  process 6617: arguments to dbus_connection_unref() were incorrect, assertion "connection->generation == _dbus_current_generation" failed in file ../../dbus/dbus-connection.c line 2822.
  This is normally a bug in some application using the D-Bus library.
  process 6617: arguments to dbus_connection_unref() were incorrect, assertion "connection->generation == _dbus_current_generation" failed in file ../../dbus/dbus-connection.c line 2822.
  This is normally a bug in some application using the D-Bus library.
  process 6617: arguments to dbus_connection_close() were incorrect, assertion "connection->generation == _dbus_current_generation" failed in file ../../dbus/dbus-connection.c line 2935.
  This is normally a bug in some application using the D-Bus library.
  process 6617: arguments to dbus_connection_unref() were incorrect, assertion "connection->generation == _dbus_current_generation" failed in file ../../dbus/dbus-connection.c line 2822.
  This is normally a bug in some application using the D-Bus library.
  process 6617: arguments to dbus_connection_unref() were incorrect, assertion "connection->generation == _dbus_current_generation" failed in file ../../dbus/dbus-connection.c line 2822.
  This is normally a bug in some application using the D-Bus library.
  Sdk-Launcher> Stopping Application
  Sdk-Launcher> The Application exited, cleaning up
  Sdk-Launcher> Finished

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