help , segfault when running weston

[microcai]

the backtrace is:

(gdb) backtrace
#0  0x0000000000000000 in ?? ()
#1  0x00007ffff79b6653 in eglQueryWaylandBufferWL () from
/usr/lib64/libEGL.so.1
#2  0x0000000000408a7a in weston_surface_attach (surface=0x8c8680,
buffer=0x8937c0) at compositor.c:778
#3  0x000000000040a79c in surface_attach (client=0x8bde80,
resource=0x8c8680, buffer_resource=0x8937c0, sx=0, sy=0) at
compositor.c:1399
#4  0x00007ffff6109f1c in ffi_call_unix64 () from /usr/lib64/libffi.so.6
#5  0x00007ffff61098b4 in ffi_call () from /usr/lib64/libffi.so.6
#6  0x00007ffff7bd5633 in ?? () from /usr/lib64/libwayland-server.so.0
#7  0x00007ffff7bd26ac in ?? () from /usr/lib64/libwayland-server.so.0
#8  0x00007ffff7bd457b in wl_event_loop_dispatch () from
/usr/lib64/libwayland-server.so.0
#9  0x00007ffff7bd2ee8 in wl_display_run () from
/usr/lib64/libwayland-server.so.0
#10 0x000000000040f8f9 in main (argc=1, argv=0x7fffffffdf28) at
compositor.c:3532


mesa weston wayland libdrm libxkbcommon are all currently git master.

driver is nouveau and kernel 3.4.4
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