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[Alexandros Frantzis <alexandros.frantzis@xxxxxxxxxxxxx>]

Public bug reported:

Unity8 crashes on 'sudo stop lightdm' with the following error in the
log:

terminate called after throwing an instance of 'std::runtime_error'
  what():  org.freedesktop.DBus.Error.Disconnected: Connection is closed

Backtrace is:

#0  __libc_do_syscall () at ../ports/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:44
#1  0xb615ae5e in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#2  0xb615bb4e in __GI_abort () at abort.c:89
#3  0xb6298184 in __gnu_cxx::__verbose_terminate_handler() ()
   from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6
#4  0xb62969b4 in ?? () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6
#5  0xb6296a0a in std::terminate() () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6
#6  0xb6296c2a in __cxa_throw () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6
#7  0xa8f58320 in core::dbus::Bus::remove_match(core::dbus::MatchRule const&) ()
   from /usr/lib/arm-linux-gnueabihf/libdbus-cpp.so.4
#8  0xa901173c in core::dbus::Signal<mpris::Player::Signals::PlaybackStatusChanged, core::ubuntu::media::Player::PlaybackStatus>::~Signal() () from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
#9  0xa90117c8 in std::_Sp_counted_ptr<core::dbus::Signal<mpris::Player::Signals::PlaybackStatusChanged, core::ubuntu::media::Player::PlaybackStatus>*, (__gnu_cxx::_Lock_policy)2>::_M_dispose() ()
   from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
#10 0xa8ff8286 in std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release() ()
   from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
#11 0xa8ff4fe6 in core::ubuntu::media::PlayerStub::~PlayerStub() ()
   from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
#12 0xa8ff50a0 in core::ubuntu::media::PlayerStub::~PlayerStub() ()
   from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
#13 0xa906f7ce in AalMediaPlayerService::~AalMediaPlayerService() ()
   from /usr/lib/arm-linux-gnueabihf/qt5/plugins/mediaservice/libaalmediaplayer.so
#14 0xa906f80c in AalMediaPlayerService::~AalMediaPlayerService() ()
   from /usr/lib/arm-linux-gnueabihf/qt5/plugins/mediaservice/libaalmediaplayer.so
#15 0xaac02cfe in QMediaPlayer::~QMediaPlayer() ()
   from /usr/lib/arm-linux-gnueabihf/libQt5Multimedia.so.5
#16 0xaac02d18 in QMediaPlayer::~QMediaPlayer() ()
   from /usr/lib/arm-linux-gnueabihf/libQt5Multimedia.so.5
#17 0xa9aa61c4 in ?? ()
   from /usr/lib/arm-linux-gnueabihf/qt5/qml/QtMultimedia/libdeclarative_multimedia.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

** Affects: unity8 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1371593

Title:
  Unity8 crashes on 'sudo stop lightdm'

Status in “unity8” package in Ubuntu:
  New

Bug description:
  Unity8 crashes on 'sudo stop lightdm' with the following error in the
  log:

  terminate called after throwing an instance of 'std::runtime_error'
    what():  org.freedesktop.DBus.Error.Disconnected: Connection is closed

  Backtrace is:

  #0  __libc_do_syscall () at ../ports/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:44
  #1  0xb615ae5e in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
  #2  0xb615bb4e in __GI_abort () at abort.c:89
  #3  0xb6298184 in __gnu_cxx::__verbose_terminate_handler() ()
     from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6
  #4  0xb62969b4 in ?? () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6
  #5  0xb6296a0a in std::terminate() () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6
  #6  0xb6296c2a in __cxa_throw () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6
  #7  0xa8f58320 in core::dbus::Bus::remove_match(core::dbus::MatchRule const&) ()
     from /usr/lib/arm-linux-gnueabihf/libdbus-cpp.so.4
  #8  0xa901173c in core::dbus::Signal<mpris::Player::Signals::PlaybackStatusChanged, core::ubuntu::media::Player::PlaybackStatus>::~Signal() () from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
  #9  0xa90117c8 in std::_Sp_counted_ptr<core::dbus::Signal<mpris::Player::Signals::PlaybackStatusChanged, core::ubuntu::media::Player::PlaybackStatus>*, (__gnu_cxx::_Lock_policy)2>::_M_dispose() ()
     from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
  #10 0xa8ff8286 in std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release() ()
     from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
  #11 0xa8ff4fe6 in core::ubuntu::media::PlayerStub::~PlayerStub() ()
     from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
  #12 0xa8ff50a0 in core::ubuntu::media::PlayerStub::~PlayerStub() ()
     from /usr/lib/arm-linux-gnueabihf/libmedia-hub-client.so.1
  #13 0xa906f7ce in AalMediaPlayerService::~AalMediaPlayerService() ()
     from /usr/lib/arm-linux-gnueabihf/qt5/plugins/mediaservice/libaalmediaplayer.so
  #14 0xa906f80c in AalMediaPlayerService::~AalMediaPlayerService() ()
     from /usr/lib/arm-linux-gnueabihf/qt5/plugins/mediaservice/libaalmediaplayer.so
  #15 0xaac02cfe in QMediaPlayer::~QMediaPlayer() ()
     from /usr/lib/arm-linux-gnueabihf/libQt5Multimedia.so.5
  #16 0xaac02d18 in QMediaPlayer::~QMediaPlayer() ()
     from /usr/lib/arm-linux-gnueabihf/libQt5Multimedia.so.5
  #17 0xa9aa61c4 in ?? ()
     from /usr/lib/arm-linux-gnueabihf/qt5/qml/QtMultimedia/libdeclarative_multimedia.so
  Backtrace stopped: previous frame identical to this frame (corrupt stack?)

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