(gdb) run
Starting program: /tmp/upp1/theide
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff1e00640 (LWP 13627)]
[New Thread 0x7ffff1400640 (LWP 13628)]

Thread 1 "theide" received signal SIGSEGV, Segmentation fault.
___pthread_mutex_lock (mutex=0x9b923358dd665169) at ./nptl/pthread_mutex_lock.c:80
80      ./nptl/pthread_mutex_lock.c: No file.

(gdb) backtrace
#0  ___pthread_mutex_lock (mutex=0x9b923358dd665169) at ./nptl/pthread_mutex_lock.c:80
#1  0x00007ffff7d3d60f in XrmQGetResource () at /lib/x86_64-linux-gnu/libX11.so.6
#2  0x00007ffff7d1ed8a in XGetDefault () at /lib/x86_64-linux-gnu/libX11.so.6
#3  0x00007ffff64b5a13 in _XcursorGetDisplayInfo () at /lib/x86_64-linux-gnu/libXcursor.so.1
#4  0x00007ffff64b6b0d in XcursorGetTheme () at /lib/x86_64-linux-gnu/libXcursor.so.1
#5  0x00007ffff73593d1 in gdk_x11_display_set_cursor_theme ()
    at /lib/x86_64-linux-gnu/libgdk-3.so.0
#6  0x00007ffff76e1681 in  () at /lib/x86_64-linux-gnu/libgtk-3.so.0
#7  0x00007ffff76e7240 in  () at /lib/x86_64-linux-gnu/libgtk-3.so.0
#8  0x0000555555ab5654 in Upp::GtkSettingsString(char const*)
    (name=0x555556724259 "gtk-font-name") at /tmp/upp1/uppsrc/CtrlLib/ChGtk3.cpp:24
#9  0x0000555555ab56f5 in Upp::SetupFont() () at /tmp/upp1/uppsrc/CtrlLib/ChGtk3.cpp:35
#10 0x0000555555ab6fe3 in Upp::ChHostSkin() () at /tmp/upp1/uppsrc/CtrlLib/ChGtk3.cpp:299
#11 0x0000555555f64044 in Upp::Ctrl::ReSkin() () at /tmp/upp1/uppsrc/CtrlCore/Ctrl.cpp:949
#12 0x0000555555f63592 in Upp::Ctrl::SetUHDEnabled(bool) (set=true)
    at /tmp/upp1/uppsrc/CtrlCore/Ctrl.cpp:792
#13 0x0000555555f93d18 in Upp::InitGtkApp(int, char**, char const**)
    (argc=1, argv=0x7fffffffdfd8, envptr=0x555556c6a020)
    at /tmp/upp1/uppsrc/CtrlCore/GtkApp.cpp:123
#14 0x00005555557b3a28 in main(int, char**, char const**)
    (argc=1, argv=0x7fffffffdfd8, envptr=0x555556c6a020) at /tmp/upp1/uppsrc/ide/main.cpp:178