#0  0x00007fb06a6fc357 in QHash<int, QWindowSystemInterface::TouchPoint>::remove (this=0x7fb00d45bcd0, akey=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qhash.h:826
  [Error: /usr/include/x86_64-linux-gnu/qt5/QtCore/qhash.h was not found in source tree]
#1  0x0000000001df5500 in ?? ()
#2  0x0000000001df6290 in ?? ()
#3  0x00007fb07421a5c2 in QOpenGLContext::makeCurrent (this=0x7fb00d45bd00, surface=0x7fb06a6feafb <SessionAuthorizer::connection_is_allowed(mir::frontend::SessionCredentials const&)+683>) at kernel/qopenglcontext.cpp:813
  [Error: kernel/qopenglcontext.cpp was not found in source tree]
#4  0x00007fb073684b12 in QSGRenderThread::sync (this=0x1df55d0) at scenegraph/qsgthreadedrenderloop.cpp:537
  [Error: scenegraph/qsgthreadedrenderloop.cpp was not found in source tree]
#5  0x00007fb073684e98 in QSGRenderThread::syncAndRender (this=0x1df55d0) at scenegraph/qsgthreadedrenderloop.cpp:587
  [Error: scenegraph/qsgthreadedrenderloop.cpp was not found in source tree]
#6  0x00007fb0736857d8 in QSGRenderThread::run (this=0x1df55d0) at scenegraph/qsgthreadedrenderloop.cpp:704
  [Error: scenegraph/qsgthreadedrenderloop.cpp was not found in source tree]
#7  0x00007fb0727036ce in QThreadPrivate::start (arg=0x1df55d0) at thread/qthread_unix.cpp:345
  [Error: thread/qthread_unix.cpp was not found in source tree]
#8  0x00007fb070f2d0a5 in start_thread (arg=0x7fb00d45c700) at pthread_create.c:309
  [Error: pthread_create.c was not found in source tree]
#9  0x00007fb071e7590d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
  [Error: ../sysdeps/unix/sysv/linux/x86_64/clone.S was not found in source tree]