?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
_XReadEvents () from /usr/lib/x86_64-linux-gnu/libX11.so.6
XIfEvent () from /usr/lib/x86_64-linux-gnu/libX11.so.6
gdk_x11_get_server_time () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0