#0  wl_proxy_get_user_data (proxy=proxy@entry=0x0) at ../../src/wayland-client.c:1114
  [Error: ../../src/wayland-client.c was not found in source tree]
#1  0x00007f2d7ce86949 in wl_surface_get_user_data (wl_surface=0x0) at /usr/include/wayland-client-protocol.h:1217
  [Error: /usr/include/wayland-client-protocol.h was not found in source tree]
#2  pointer_handle_enter (data=0x15d2830, pointer=<optimized out>, serial=<optimized out>, surface=0x0, sx=19968, sy=0) at /build/buildd/gtk+3.0-3.6.4/./gdk/wayland/gdkdevice-wayland.c:963
  [Error: /build/buildd/gtk+3.0-3.6.4/./gdk/wayland/gdkdevice-wayland.c was not found in source tree]
#3  0x00007f2d764b6bc8 in ffi_closure_unix64_inner (closure=0x4e00, rvalue=0x15ea770, reg_args=0x16b, argp=0x7fffe8ddaeb4 "\001") at ../src/x86/ffi64.c:671
  [Error: ../src/x86/ffi64.c was not found in source tree]
#4  0x00007fffe8ddaf2c in ?? ()
#5  0x00007fffe8ddaf00 in ?? ()
#6  0x00007f2d764b65d0 in ffi_call (cif=<error reading variable: Cannot access memory at address 0xffffffffffffff80>, fn=<error reading variable: Cannot access memory at address 0xffffffffffffff70>, rvalue=<error reading variable: Cannot access memory at address 0xffffffffffffff78>, avalue=0x7fffe8ddae10) at ../src/x86/ffi64.c:471
  [Error: ../src/x86/ffi64.c was not found in source tree]