backtrace:
#0  0x00007ffff6ca9a94 in __memcpy_sse2_unaligned () from /usr/lib/libc.so.6
No symbol table info available.
#1  0x00007ffff0c44c6d in ?? () from /usr/lib/egl/egl_gallium.so
No symbol table info available.
#2  0x00007ffff0c4a085 in ?? () from /usr/lib/egl/egl_gallium.so
No symbol table info available.
#3  0x00007ffff0c4a355 in ?? () from /usr/lib/egl/egl_gallium.so
No symbol table info available.
#4  0x00007ffff0c9f9ba in ?? () from /usr/lib/egl/egl_gallium.so
No symbol table info available.
#5  0x00007ffff0c363a3 in ?? () from /usr/lib/egl/egl_gallium.so
No symbol table info available.
#6  0x00007ffff0c3a03c in ?? () from /usr/lib/egl/egl_gallium.so
No symbol table info available.
#7  0x00007ffff17a14e7 in gl_renderer_flush_damage (surface=0xab4f50) at src/gl-renderer.c:1082
        r = <optimized out>
        buffer = 0xab5220
        view = <optimized out>
        texture_used = 1
        format = 32993
        pixel_type = <optimized out>
        rectangles = <optimized out>
        data = 0x7fffebe7e000
        i = 0
        n = 1
#8  0x000000000041096f in surface_flush_damage (surface=0xab4f50) at src/compositor.c:1508
No locals.
#9  compositor_accumulate_damage (ec=0x63dbe0) at src/compositor.c:1581
        plane = <optimized out>
        ev = 0xab9660
        opaque = {extents = {x1 = 103, y1 = 254, x2 = 1383, y2 = 974}, data = 0x0}
        clip = {extents = {x1 = 103, y1 = 254, x2 = 1383, y2 = 974}, data = 0x0}
#10 weston_output_repaint (msecs=<optimized out>, output=0x63dda8) at src/compositor.c:1749
        ec = 0x63dbe0
        output_damage = {extents = {x1 = 0, y1 = 0, x2 = 0, y2 = 0}, data = 0x7ffff79b45a0}
        ev = <optimized out>
        animation = <optimized out>
        next = <optimized out>
        cb = <optimized out>
        cnext = <optimized out>
        frame_callback_list = {prev = 0xa7a9f8, next = 0xa7a9f8}
        r = <optimized out>
#11 weston_output_finish_frame (output=output@entry=0x6d3960, msecs=<optimized out>) at src/compositor.c:1805
        compositor = <optimized out>
        loop = 0x62e1e0
        fd = <optimized out>
#12 0x00007ffff61c09b5 in x11_output_start_repaint_loop (output=0x6d3960) at src/compositor-x11.c:346
        msec = <optimized out>
        tv = {tv_sec = 1391713127, tv_usec = 524623}
#13 finish_frame_handler (data=0x6d3960) at src/compositor-x11.c:456
        output = 0x6d3960
#14 0x00007ffff7bd3973 in wl_event_source_timer_dispatch (source=0x6c5d10, ep=<optimized out>) at event-loop.c:180
        timer_source = 0x6c5d10
        expires = 1
        len = <optimized out>
#15 0x00007ffff7bd40aa in wl_event_loop_dispatch (loop=0x62e1e0, timeout=timeout@entry=-1) at event-loop.c:421
        ep = {{events = 1, data = {ptr = 0x6c5d10, fd = 7101712, u32 = 7101712, u64 = 7101712}}, {events = 0, data = {ptr = 0x7fffffffda80, fd = -9600, u32 = 4294957696, u64 = 140737488345728}}, {events = 11232152, data = {ptr = 0xffffdac000000000, fd = 0, u32 = 0, u64 = 18446703116901416960}}, {events = 32767, data = {ptr = 0x7ffff7bd47ea <wl_connection_flush+346>, fd = -138590230, u32 = 4156377066, u64 = 140737349765098}}, {events = 1, data = {ptr = 0x14000021c0, fd = 8640, u32 = 8640, u64 = 85899354560}}, {events = 0, data = {ptr = 0x1, fd = 1, u32 = 1, u64 = 1}}, {events = 4294957776, data = {ptr = 0xab83a800007fff, fd = 32767, u32 = 32767, u64 = 48276978595299327}}, {events = 0, data = {ptr = 0x7fffffffda60, fd = -9632, u32 = 4294957664, u64 = 140737488345696}}, {events = 11232600, data = {ptr = 0x8c00000000, fd = 0, u32 = 0, u64 = 601295421440}}, {events = 0, data = {ptr = 0xab6398, fd = 11232152, u32 = 11232152, u64 = 11232152}}, {events = 4, data = {ptr = 0x0, fd = 0, u32 = 0, u64 = 0}}, {events = 0, data = {ptr = 0x0, fd = 0, u32 = 0, u64 = 0}}, {events = 4294957664, data = {ptr = 0x100007fff, fd = 32767, u32 = 32767, u64 = 4295000063}}, {events = 0, data = {ptr = 0x7fffffffdac0, fd = -9536, u32 = 4294957760, u64 = 140737488345792}}, {events = 0, data = {ptr = 0x0, fd = 0, u32 = 0, u64 = 0}}, {events = 32767, data = {ptr = 0x7ffff7bd27b5 <wl_display_add_socket+485>, fd = -138598475, u32 = 4156368821, u64 = 140737349756853}}, {events = 20, data = {ptr = 0x100000000, fd = 0, u32 = 0, u64 = 4294967296}}, {events = 1, data = {ptr = 0x1e, fd = 30, u32 = 30, u64 = 30}}, {events = 7609798, data = {ptr = 0x63dbe000000000, fd = 0, u32 = 0, u64 = 28107777813512192}}, {events = 0, data = {ptr = 0x4085c3 <weston_log_continue+163>, fd = 4228547, u32 = 4228547, u64 = 4228547}}, {events = 7603040, data = {ptr = 0xf7ddc35000000000, fd = 0, u32 = 0, u64 = 17860646445586055168}}, {events = 32767, data = {ptr = 0x0, fd = 0, u32 = 0, u64 = 0}}, {events = 6480208, data = {ptr = 0x0, fd = 0, u32 = 0, u64 = 0}}, {events = 0, data = {ptr = 0x62fbd0, fd = 6486992, u32 = 6486992, u64 = 6486992}}, {events = 4294959280, data = {ptr = 0xf7deacf700007fff, fd = 32767, u32 = 32767, u64 = 17860903349054898175}}, {events = 32767, data = {ptr = 0x7fff00000005, fd = 5, u32 = 5, u64 = 140733193388037}}, {events = 0, data = {ptr = 0x500000000, fd = 0, u32 = 0, u64 = 21474836480}}, {events = 0, data = {ptr = 0x7ffff7bcc9c0, fd = -138622528, u32 = 4156344768, u64 = 140737349732800}}, {events = 6480208, data = {ptr = 0x9ce2330000000000, fd = 0, u32 = 0, u64 = 11304654089746382848}}, {events = 3816379337, data = {ptr = 0x63dbe0, fd = 6544352, u32 = 6544352, u64 = 6544352}}, {events = 6480240, data = {ptr = 0x62e19800000000, fd = 0, u32 = 0, u64 = 27832590668922880}}, {events = 0, data = {ptr = 0x62e150, fd = 6480208, u32 = 6480208, u64 = 6480208}}}
        source = <optimized out>
        i = <optimized out>
        count = <optimized out>
        n = -9712
#16 0x00007ffff7bd25c5 in wl_display_run (display=display@entry=0x62e150) at wayland-server.c:961
No locals.
#17 0x0000000000407d92 in main (argc=1, argv=<optimized out>) at src/compositor.c:4156
        ret = 0
        display = 0x62e150
        ec = 0x63dbe0
        signals = {0x62e270, 0x62e2c0, 0x62e8d0, 0x62e920}
        loop = <optimized out>
        backend_init = <optimized out>
        i = <optimized out>
        backend = 0x62f990 "de"
        option_backend = 0x0
        shell = 0x6b4ab0 "gl_DepthRangeParameters"
        option_shell = 0x0
        modules = 0x6b4ab0 "gl_DepthRangeParameters"
        option_modules = 0x0
        log = 0x0
        idle_time = 300
        help = 0
        socket_name = 0x421942 "wayland-0"
        version = 0
        config = <optimized out>
        section = 0x62fbd0
        core_options = {{type = WESTON_OPTION_STRING, name = 0x42194c "backend", short_name = 66, data = 0x7fffffffdc60}, {type = WESTON_OPTION_STRING, name = 0x421954 "shell", short_name = 0, data = 0x7fffffffdca0}, {type = WESTON_OPTION_STRING, name = 0x42195a "socket", short_name = 83, data = 0x7fffffffdd00}, {type = WESTON_OPTION_INTEGER, name = 0x421961 "idle-time", short_name = 105, data = 0x7fffffffdbe0}, {type = WESTON_OPTION_STRING, name = 0x42196b "modules", short_name = 0, data = 0x7fffffffdcc0}, {type = WESTON_OPTION_STRING, name = 0x421973 "log", short_name = 0, data = 0x7fffffffdce0}, {type = WESTON_OPTION_BOOLEAN, name = 0x421977 "help", short_name = 104, data = 0x7fffffffdc00}, {type = WESTON_OPTION_BOOLEAN, name = 0x42197c "version", short_name = 0, data = 0x7fffffffdc20}}


registers:
rax            0x384000	3686400
rbx            0x384000	3686400
rcx            0x373000	3616768
rdx            0x384000	3686400
rsi            0x7fffebe7e000	140737151229952
rdi            0x7fffeb776000	140737143857152
rbp            0x7fffffffd530	0x7fffffffd530
rsp            0x7fffffffd398	0x7fffffffd398
r8             0x37300	226048
r9             0x38400	230400
r10            0x0	0
r11            0x246	582
r12            0x384000	3686400
r13            0x7fffec202000	140737154916352
r14            0x2	2
r15            0x7fffffffd530	140737488344368
rip            0x7ffff6ca9a94	0x7ffff6ca9a94 <__memcpy_sse2_unaligned+372>
eflags         0x10206	[ PF IF RF ]
cs             0x33	51
ss             0x2b	43
ds             0x0	0
es             0x0	0
fs             0x0	0
gs             0x0	0


current instructions:
=> 0x7ffff6ca9a94 <__memcpy_sse2_unaligned+372>:	movdqu (%rsi,%rcx,1),%xmm8
   0x7ffff6ca9a9a <__memcpy_sse2_unaligned+378>:	add    $0x1,%r8
   0x7ffff6ca9a9e <__memcpy_sse2_unaligned+382>:	movdqu %xmm8,(%rdi,%rcx,1)
   0x7ffff6ca9aa4 <__memcpy_sse2_unaligned+388>:	add    $0x10,%rcx
   0x7ffff6ca9aa8 <__memcpy_sse2_unaligned+392>:	cmp    %r8,%r9
   0x7ffff6ca9aab <__memcpy_sse2_unaligned+395>:	ja     0x7ffff6ca9a94 <__memcpy_sse2_unaligned+372>
   0x7ffff6ca9aad <__memcpy_sse2_unaligned+397>:	cmp    %rax,%rdx
   0x7ffff6ca9ab0 <__memcpy_sse2_unaligned+400>:	je     0x7ffff6ca995e <__memcpy_sse2_unaligned+62>
   0x7ffff6ca9ab6 <__memcpy_sse2_unaligned+406>:	movzbl (%rsi,%rax,1),%ecx
   0x7ffff6ca9aba <__memcpy_sse2_unaligned+410>:	mov    %cl,(%rdi,%rax,1)
   0x7ffff6ca9abd <__memcpy_sse2_unaligned+413>:	add    $0x1,%rax
   0x7ffff6ca9ac1 <__memcpy_sse2_unaligned+417>:	cmp    %rax,%rdx
   0x7ffff6ca9ac4 <__memcpy_sse2_unaligned+420>:	ja     0x7ffff6ca9ab6 <__memcpy_sse2_unaligned+406>
   0x7ffff6ca9ac6 <__memcpy_sse2_unaligned+422>:	jmpq   0x7ffff6ca995e <__memcpy_sse2_unaligned+62>
   0x7ffff6ca9acb <__memcpy_sse2_unaligned+427>:	test   $0x18,%dl
   0x7ffff6ca9ace <__memcpy_sse2_unaligned+430>:	jne    0x7ffff6ca9b0d <__memcpy_sse2_unaligned+493>


threads backtrace:

Thread 2 (Thread 0x7fffee061700 (LWP 6666)):
#0  0x00007ffff65fa03f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007ffff0e5bd23 in ?? () from /usr/lib/egl/egl_gallium.so
#2  0x00007ffff65f60a2 in start_thread () from /usr/lib/libpthread.so.0
#3  0x00007ffff6d0032d in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7ffff7fc08c0 (LWP 6662)):
#0  0x00007ffff6ca9a94 in __memcpy_sse2_unaligned () from /usr/lib/libc.so.6
#1  0x00007ffff0c44c6d in ?? () from /usr/lib/egl/egl_gallium.so
#2  0x00007ffff0c4a085 in ?? () from /usr/lib/egl/egl_gallium.so
#3  0x00007ffff0c4a355 in ?? () from /usr/lib/egl/egl_gallium.so
#4  0x00007ffff0c9f9ba in ?? () from /usr/lib/egl/egl_gallium.so
#5  0x00007ffff0c363a3 in ?? () from /usr/lib/egl/egl_gallium.so
#6  0x00007ffff0c3a03c in ?? () from /usr/lib/egl/egl_gallium.so
#7  0x00007ffff17a14e7 in gl_renderer_flush_damage (surface=0xab4f50) at src/gl-renderer.c:1082
#8  0x000000000041096f in surface_flush_damage (surface=0xab4f50) at src/compositor.c:1508
#9  compositor_accumulate_damage (ec=0x63dbe0) at src/compositor.c:1581
#10 weston_output_repaint (msecs=<optimized out>, output=0x63dda8) at src/compositor.c:1749
#11 weston_output_finish_frame (output=output@entry=0x6d3960, msecs=<optimized out>) at src/compositor.c:1805
#12 0x00007ffff61c09b5 in x11_output_start_repaint_loop (output=0x6d3960) at src/compositor-x11.c:346
#13 finish_frame_handler (data=0x6d3960) at src/compositor-x11.c:456
#14 0x00007ffff7bd3973 in wl_event_source_timer_dispatch (source=0x6c5d10, ep=<optimized out>) at event-loop.c:180
#15 0x00007ffff7bd40aa in wl_event_loop_dispatch (loop=0x62e1e0, timeout=timeout@entry=-1) at event-loop.c:421
#16 0x00007ffff7bd25c5 in wl_display_run (display=display@entry=0x62e150) at wayland-server.c:961
#17 0x0000000000407d92 in main (argc=1, argv=<optimized out>) at src/compositor.c:4156