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[Alberto Aguirre <alberto.aguirre@xxxxxxxxxxxxx>]

** Also affects: mir
   Importance: Undecided
       Status: New

** Changed in: mir
       Status: New => Fix Released

** Changed in: mir (Ubuntu)
       Status: New => Confirmed

** Changed in: mir
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1347789

Title:
  Crash in USC during
  mir::compositor::BufferQueue::BufferQueue::operator()

Status in Mir:
  Fix Released
Status in “mir” package in Ubuntu:
  Confirmed

Bug description:
  At least I think that's what's happening.

  I got this crash on boot while testing the unlock-device script that
  unity8 provides (which basically just reboots and unlocks the
  greeter).

  I'll attach the .crash file, but here's the stacktrace:

  Core was generated by `unity-system-compositor --spinner=/usr/bin/unity-system-compositor-spinner --fi'.
  Program terminated with signal SIGABRT, Aborted.
  #0  __libc_do_syscall ()
      at ../ports/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:44
  44	../ports/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S: No such file or directory.
  (gdb) bt
  #0  __libc_do_syscall ()
      at ../ports/sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:44
  #1  0xb67eb05e in __GI_raise (sig=sig@entry=6)
      at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
  #2  0xb67ebd4e in __GI_abort () at abort.c:89
  #3  0xb67e62b8 in __assert_fail_base (
      fmt=0x1 <error: Cannot access memory at address 0x1>, 
      assertion=0xb6ba10f4 "!pending_client_notifications.empty()", 
      assertion@entry=0x0, 
      file=0xb6ba0ff0 "/build/buildd/mir-0.5.0+14.10.20140722/src/server/compositor/buffer_queue.cpp", file@entry=0xb4a53000 "\001", line=136, 
      line@entry=3062534324, 
      function=function@entry=0xb6ba0cf4 <mir::compositor::BufferQueue::BufferQueue(int, std::shared_ptr<mir::graphics::GraphicBufferAllocator> const&, mir::graphics::BufferProperties const&, mir::compositor::FrameDroppingPolicyFactory const&)::{lambda()#1}::operator()() const::__PRETTY_FUNCTION__> "mir::compositor::BufferQueue::BufferQueue(int, const std::shared_ptr<mir::graphics::GraphicBufferAllocator>&, const mir::graphics::BufferProperties&, const mir::compositor::FrameDroppingPolicyFactory&"...) at assert.c:92
  #4  0xb67e634e in __GI___assert_fail (assertion=0x0, file=0xb4a53000 "\001", 
      line=3062534324, 
      function=0xb6ba0cf4 <mir::compositor::BufferQueue::BufferQueue(int, std::shared_ptr<mir::graphics::GraphicBufferAllocator> const&, mir::graphics::BufferProperties const&, mir::compositor::FrameDroppingPolicyFactory const&)::{lambda()#1}::operator()() const::__PRETTY_FUNCTION__> "mir::compositor::BufferQueue::BufferQueue(int, const std::shared_ptr<mir::graphics::GraphicBufferAllocator>&, const mir::graphics::BufferProperties&, const mir::compositor::FrameDroppingPolicyFactory&"...) at assert.c:101
  #5  0xb6b03f6a in operator() (__closure=0xb68a90b4 <lock>)
      at /build/buildd/mir-0.5.0+14.10.20140722/src/server/compositor/buffer_queue.cpp:136
  #6  std::_Function_handler<void(), mir::compositor::BufferQueue::BufferQueue(int, const std::shared_ptr<mir::graphics::GraphicBufferAllocator>&, const mir::graphics::BufferProperties&, const mir::compositor::FrameDroppingPolicyFactory&)::<lambda()> >::_M_invoke(const std::_Any_data &) (__functor=...)
      at /usr/include/c++/4.9/functional:2039
  #7  0xb6b02eec in operator() (this=0xae4018ac)
      at /usr/include/c++/4.9/functional:2439
  #8  operator() (__closure=0xae4018a8)
      at /build/buildd/mir-0.5.0+14.10.20140722/src/server/compositor/timeout_frame_dropping_policy_factory.cpp:59
  #9  std::_Function_handler<void(), (anonymous namespace)::TimeoutFrameDroppingPolicy::TimeoutFrameDroppingPolicy(const std::shared_ptr<mir::time::Timer>&, std::chrono::milliseconds, std::function<void()>)::<lambda()> >::_M_invoke(const std::_Any_data &) (__functor=...) at /usr/include/c++/4.9/functional:2039
  #10 0xb6aea5ac in operator() (ec=..., __closure=<optimized out>)
      at /build/buildd/mir-0.5.0+14.10.20140722/src/server/asio_main_loop.cpp:390
  #11 std::_Function_handler<void(const boost::system::error_code&), (anonymous namespace)::make_handler(std::weak_ptr<(anonymous namespace)::AlarmImpl::InternalState>)::<lambda(const boost::system::error_code&)> >::_M_invoke(const std::_Any_data &, const boost::system::error_code &) (__functor=..., __args#0=...)
      at /usr/include/c++/4.9/functional:2039
  #12 0xb6aefb20 in operator() (__args#0=..., this=0xbea21ac4)
      at /usr/include/c++/4.9/functional:2439
  #13 operator() (this=0xbea21ac4)
      at /usr/include/boost/asio/detail/bind_handler.hpp:47
  #14 asio_handler_invoke<boost::asio::detail::binder1<std::function<void(const boost::system::error_code&)>, boost::system::error_code> > (function=...)
      at /usr/include/boost/asio/handler_invoke_hook.hpp:69
  #15 invoke<boost::asio::detail::binder1<std::function<void(const boost::system::error_code&)>, boost::system::error_code>, std::function<void(const boost::system::error_code&)> > (context=..., function=...)
      at /usr/include/boost/asio/detail/handler_invoke_helpers.hpp:37
  #16 boost::asio::detail::wait_handler<std::function<void (boost::system::error_code const&)> >::do_complete(boost::asio::detail::task_io_service*, boost::asio::detail::task_io_service_operation*, boost::system::error_code const&, unsigned int) (owner=0x88, base=<optimized out>)
      at /usr/include/boost/asio/detail/wait_handler.hpp:70
  #17 0xb6aee2f6 in complete (bytes_transferred=<optimized out>, ec=..., 
      owner=..., this=0xae4039f0)
      at /usr/include/boost/asio/detail/task_io_service_operation.hpp:38
  #18 do_run_one (ec=..., this_thread=..., lock=..., this=0x147d7a0)
      at /usr/include/boost/asio/detail/impl/task_io_service.ipp:384
  #19 boost::asio::detail::task_io_service::run (this=0x147d7a0, ec=...)
      at /usr/include/boost/asio/detail/impl/task_io_service.ipp:153
  #20 0xb6aea404 in run (this=<optimized out>)
      at /usr/include/boost/asio/impl/io_service.ipp:59
  #21 mir::AsioMainLoop::run (this=<optimized out>)
      at /build/buildd/mir-0.5.0+14.10.20140722/src/server/asio_main_loop.cpp:261
  #22 0xb6ae391e in mir::DisplayServer::run (this=this@entry=0xbea21bf8)
      at /build/buildd/mir-0.5.0+14.10.20140722/src/server/display_server.cpp:223
  #23 0xb6ae1434 in mir::run_mir(mir::ServerConfiguration&, std::function<void (mir::DisplayServer&)>) (config=..., init=...)
      at /build/buildd/mir-0.5.0+14.10.20140722/src/server/run_mir.cpp:93
  #24 0x00037d16 in usc::SystemCompositor::run() ()
  #25 0x0002f158 in main ()

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