Comment 2 for bug 1301917

StacktraceTop:
 XGetDeviceButtonMapping (dpy=0x130b100, device=device@entry=0x13ffc50, map=map@entry=0x133d930 "P\331i\001", nmap=nmap@entry=16) at ../../src/XGetBMap.c:93
 set_left_handed (manager=<optimized out>, device=0x7f9a9c0036b0, mouse_left_handed=<optimized out>, touchpad_left_handed=0) at gsd-mouse-manager.c:374
 set_mouse_settings (manager=manager@entry=0x139b570, device=device@entry=0x7f9a9c0036b0) at gsd-mouse-manager.c:974
 device_added_cb (device_manager=<optimized out>, device=0x7f9a9c0036b0, manager=0x139b570) at gsd-mouse-manager.c:1164
 g_closure_invoke (closure=0x142a260, return_value=0x0, n_param_values=2, param_values=0x7fff36bdbe60, invocation_hint=0x7fff36bdbe00) at /build/buildd/glib2.0-2.40.0/./gobject/gclosure.c:768