#0  wl_proxy_get_user_data (proxy=proxy@entry=0x0) at ../../src/wayland-client.c:1114
No locals.
#1  0x00007f2d7ce86949 in wl_surface_get_user_data (wl_surface=0x0) at /usr/include/wayland-client-protocol.h:1217
No locals.
#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
        device = 0x15d2830
        event = <optimized out>
        wayland_display = <optimized out>
#3  0x00007f2d764b6bc8 in ffi_closure_unix64_inner (closure=0x4e00, rvalue=0x15ea770, reg_args=0x16b, argp=0x7fffe8ddaeb4 "\001") at ../src/x86/ffi64.c:671
        cif = 0x0
        avalue = 0x0
        arg_types = <optimized out>
        i = <optimized out>
        avn = <optimized out>
        gprcount = 0
        ssecount = <optimized out>
        ngpr = 0
        nsse = 0
        ret = 0
#4  0x00007fffe8ddaf2c in ?? ()
No symbol table info available.
#5  0x00007fffe8ddaf00 in ?? ()
No symbol table info available.
#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
        align = <optimized out>
        size = 140737100230324
        n = 0
        classes = <error reading variable classes (Cannot access memory at address 0xffffffffffffffb0)>
        stack = <error reading variable stack (Cannot access memory at address 0xffffffffffffff88)>
        argp = 0x7fffe8ddae11 ""
        arg_types = 0x1bc4010
        gprcount = <error reading variable gprcount (Cannot access memory at address 0xffffffffffffff94)>
        ssecount = <optimized out>
        ngpr = <error reading variable ngpr (Cannot access memory at address 0xffffffffffffffa8)>
        nsse = <error reading variable nsse (Cannot access memory at address 0xffffffffffffffac)>
        i = <optimized out>
        avn = <optimized out>
        ret_in_memory = <optimized out>
        reg_args = <error reading variable reg_args (Cannot access memory at address 0xffffffffffffff88)>
Backtrace stopped: previous frame inner to this frame (corrupt stack?)