qml demo shell fails to start. Terminates with a segfault:
root@ubuntu-phablet:/home/phablet/demos# gdb --args qmlscene qml-demo-shell/qml-demo-shell.qml
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Reading symbols from qmlscene...(no debugging symbols found)...done.
(gdb) r
Starting program: /usr/bin/qmlscene qml-demo-shell/qml-demo-shell.qml
process 4284 is executing new program: /usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
qtmir.screens: ScreensModel::ScreensModel
[2016-05-03 07:14:31.729116] mirplatform: Found graphics driver: mir:android (version 0.23.0)
[2016-05-03 07:14:31.730551] mirplatform: Found graphics driver: dummy (version 0.23.0)
[2016-05-03 07:14:31.730917] mirplatform: Found graphics driver: throw-on-creation (version 0.23.0)
qtmir.mir: MirServer created
qtmir.mir: Command line arguments passed to Qt: ("/usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene", "qml-demo-shell/qml-demo-shell.qml")
[2016-05-03 07:14:31.915213] mirserver: Starting
[2016-05-03 07:14:31.916311] mircommon: Loading modules from: /usr/lib/arm-linux-gnueabihf/mir/server-platform
[2016-05-03 07:14:31.916708] mircommon: Loading module: /usr/lib/arm-linux-gnueabihf/mir/server-platform/graphics-android.so.9
[2016-05-03 07:14:31.916922] mircommon: Loading module: /usr/lib/arm-linux-gnueabihf/mir/server-platform/input-evdev.so.5
[New Thread 0xb1dff410 (LWP 4293)]
[2016-05-03 07:14:31.965719] mircommon: Loading module: /usr/lib/arm-linux-gnueabihf/mir/server-platform/graphics-dummy.so
[2016-05-03 07:14:31.989035] mircommon: Loading module: /usr/lib/arm-linux-gnueabihf/mir/server-platform/input-stub.so
[2016-05-03 07:14:32.010336] mircommon: Loading module: /usr/lib/arm-linux-gnueabihf/mir/server-platform/graphics-throw.so
[2016-05-03 07:14:32.028494] mirplatform: Found graphics driver: mir:android (version 0.23.0)
[2016-05-03 07:14:32.028952] mirplatform: Found graphics driver: dummy (version 0.23.0)
[2016-05-03 07:14:32.029318] mirplatform: Found graphics driver: throw-on-creation (version 0.23.0)
[2016-05-03 07:14:32.145620] mirserver: Selected driver: mir:android (version 0.23.0)
qtmir.mir: SessionListener::SessionListener - this= SessionListener(0xae3e57e4)
qtmir.mir: PromptSessionListener::PromptSessionListener - this= PromptSessionListener(0xae3e58ec)
qtmir.mir: MirWindowManagerImpl::MirWindowManagerImpl
[2016-05-03 07:14:32.606161] mirserver: Initial display configuration:
[2016-05-03 07:14:32.609182] mirserver: 0.1: LVDS 7.0" 95x151mm
[2016-05-03 07:14:32.609304] mirserver: Current mode 1200x1920 60.00Hz
[2016-05-03 07:14:32.609426] mirserver: Preferred mode 1200x1920 60.00Hz
[2016-05-03 07:14:32.609518] mirserver: Logical position +0+0
[2016-05-03 07:14:32.609610] mirserver: 0.2: unused DisplayPort
[2016-05-03 07:14:32.609701] mirserver: 0.3: unused (null)
[2016-05-03 07:14:32.610952] mirserver: Using software cursor
qtmir.mir: PromptSessionListener::~PromptSessionListener - this= PromptSessionListener(0xae3e58ec)
qtmir.mir: SessionListener::~SessionListener - this= SessionListener(0xae3e57e4)
[New Thread 0xad938410 (LWP 4300)]
[New Thread 0xae2ff410 (LWP 4299)]
[New Thread 0xb092c410 (LWP 4298)]
[New Thread 0xb112c410 (LWP 4297)]
[New Thread 0xb2945410 (LWP 4292)]
[New Thread 0xb3145410 (LWP 4291)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb1dff410 (LWP 4293)]
0x00000000 in ?? ()
(gdb) bt
#0 0x00000000 in ?? ()
#1 0xb1fcf544 in mir::gl::SimpleProgram::~SimpleProgram (this=0xae364848, __in_chrg=<optimized out>)
at /home/kdub/source/mir/0.23/mir/src/gl/program.cpp:103
#2 0xb1fcf58e in mir::gl::SimpleProgram::~SimpleProgram (this=0xae364848, __in_chrg=<optimized out>)
at /home/kdub/source/mir/0.23/mir/src/gl/program.cpp:104
#3 0xb1fa4cf8 in std::default_delete<mir::gl::Program>::operator() (this=0xb15dfd54, __ptr=0xae364848)
at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/unique_ptr.h:76
#4 0xb1fa4ba6 in std::unique_ptr<mir::gl::Program, std::default_delete<mir::gl::Program> >::~unique_ptr (this=0xb15dfd54, __in_chrg=<optimized out>)
at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/unique_ptr.h:236
#5 0xb1fa4aca in mir::graphics::android::HWCFallbackGLRenderer::~HWCFallbackGLRenderer (this=
0xb15dfd50, __in_chrg=<optimized out>)
at /home/kdub/source/mir/0.23/mir/src/platforms/android/server/hwc_fallback_gl_renderer.h:51
#6 0xb1fa48b8 in mir::graphics::android::DisplayBuffer::~DisplayBuffer (this=0xb15dfcf8,
__in_chrg=<optimized out>)
at /home/kdub/source/mir/0.23/mir/src/platforms/android/server/display_buffer.h:43
#7 0xb1fa4942 in mir::graphics::android::DisplayBuffer::~DisplayBuffer (this=0xb15dfcf8,
__in_chrg=<optimized out>)
at /home/kdub/source/mir/0.23/mir/src/platforms/android/server/display_buffer.h:43
#8 0xb1f998dc in std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer>::operator() (
this=0xae368e64, __ptr=0xb15dfcf8)
at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/unique_ptr.h:76
#9 0xb1f97dd6 in std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> >::~unique_ptr (this=0xae368e64,
__in_chrg=<optimized out>) at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/unique_ptr.h:236
#10 0xb1f9ecc2 in std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > >::~pair (this=0xae368e60, __in_chrg=<optimized out>)
at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/stl_pair.h:96
#11 0xb1f9ecdc in __gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > > > >::destroy<std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > > > (this=0xb150714c, __p=0xae368e60)
at /usr/arm-linux-gnueabihf/include/c++/4.9.3/ext/new_allocator.h:124
#12 0xb1f9ebee in std::allocator_traits<std::allocator<std::_Rb_tree_node<std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > > > > >::destroy<std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > > > (__a=..., __p=0xae368e60)
at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/alloc_traits.h:539
#13 0xb1f9eb62 in std::_Rb_tree<mir::graphics::android::DisplayName, std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > >, std::_Select1st<std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > > >, std::less<mir::graphics::android::DisplayName>, std::allocator<std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > > > >::_M_destroy_node (this=0xb150714c, __p=0xae368e50)
at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/stl_tree.h:436
#14 0xb1f9e930 in std::_Rb_tree<mir::graphics::android::DisplayName, std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > >, std::_Select1st<std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > > >, std::less<mir::graphics::android::DisplayName>, std::allocator<std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > > > >::_M_erase (this=0xb150714c, __x=0xae368e50)
at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/stl_tree.h:1247
#15 0xb1f9e700 in std::_Rb_tree<mir::graphics::android::DisplayName, std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > >, std::_Select1st<std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > > >, std::less<mir::graphics::android::DisplayName>, std::allocator<std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuf---Type <return> to continue, or q <return> to quit---.
fer> > > > >::~_Rb_tree (this=0xb150714c, __in_chrg=<optimized out>)
at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/stl_tree.h:715
#16 0xb1f9e020 in std::map<mir::graphics::android::DisplayName, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> >, std::less<mir::graphics::android::DisplayName>, std::allocator<std::pair<mir::graphics::android::DisplayName const, std::unique_ptr<mir::graphics::android::ConfigurableDisplayBuffer, std::default_delete<mir::graphics::android::ConfigurableDisplayBuffer> > > > >::~map (this=0xb150714c, __in_chrg=<optimized out>)
at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/stl_map.h:96
#17 0xb1f9e056 in mir::graphics::android::DisplayGroup::~DisplayGroup (this=0xb1507128,
__in_chrg=<optimized out>)
at /home/kdub/source/mir/0.23/mir/src/platforms/android/server/display_group.h:38
#18 0xb1f94f34 in mir::graphics::android::Display::~Display (this=0xb1506fa8,
__in_chrg=<optimized out>)
at /home/kdub/source/mir/0.23/mir/src/platforms/android/server/display.cpp:201
#19 0xb1f94fca in mir::graphics::android::Display::~Display (this=0xb1506fa8,
__in_chrg=<optimized out>)
at /home/kdub/source/mir/0.23/mir/src/platforms/android/server/display.cpp:204
#20 0xb38f30bc in std::default_delete<mir::graphics::Display>::operator() (this=0xae368ec4,
__ptr=0xb1506fa8) at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/unique_ptr.h:76
#21 0xb38f822c in std::_Sp_counted_deleter<mir::graphics::Display*, mir::ModuleDeleter<mir::graphics::Display>, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>::_M_dispose (this=0xae368eb8)
at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/shared_ptr_base.h:463
#22 0xb37cd0a6 in std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release (this=0xae368eb8)
at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/shared_ptr_base.h:149
#23 0xb37ccd8e in std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count (this=0xb150309c,
__in_chrg=<optimized out>) at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/shared_ptr_base.h:666
#24 0xb37d0646 in std::__shared_ptr<mir::graphics::Display, (__gnu_cxx::_Lock_policy)2>::~__shared_ptr
(this=0xb1503098, __in_chrg=<optimized out>)
at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/shared_ptr_base.h:914
#25 0xb37d0660 in std::shared_ptr<mir::graphics::Display>::~shared_ptr (this=0xb1503098,
__in_chrg=<optimized out>) at /usr/arm-linux-gnueabihf/include/c++/4.9.3/bits/shared_ptr.h:93
#26 0xb37d0a74 in mir::DisplayServer::Private::Private (this=0xb1503088, config=...)
at /home/kdub/source/mir/0.23/mir/src/server/display_server.cpp:57
#27 0xb37d03ac in mir::DisplayServer::DisplayServer (this=0xb1dfed20, config=...)
at /home/kdub/source/mir/0.23/mir/src/server/display_server.cpp:186
#28 0xb37cc5a8 in mir::run_mir(mir::ServerConfiguration&, std::function<void (mir::DisplayServer&)>, std::function<void (int)> const&) (config=..., init=..., terminator=...)
at /home/kdub/source/mir/0.23/mir/src/server/run_mir.cpp:98
#29 0xb37f4a2a in mir::Server::run (this=0x28990)
at /home/kdub/source/mir/0.23/mir/src/server/server.cpp:394
#30 0xb3ab1f7e in MirServerThread::run (this=0x2d228)
at /home/kdub/source/mir/0.23/qtmir/src/platforms/mirserver/qmirserver_p.cpp:39
#31 0xb60fc4c6 in ?? () from /usr/lib/arm-linux-gnueabihf/libQt5Core.so.5
#32 0xb5d37490 in start_thread () from /lib/arm-linux-gnueabihf/libpthread.so.0
#33 0xb5ef7c4c in ?? () from /lib/arm-linux-gnueabihf/libc.so.6
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
tagged mir as well, backtrace goes through a fair amount of mir code.