GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1 Copyright (C) 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i686-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /usr/bin/Xorg...Reading symbols from /usr/lib/debug//usr/bin/Xorg...done. done. (gdb) attach 1217 Attaching to program: /usr/bin/Xorg, process 1217 Reading symbols from /lib/i386-linux-gnu/libudev.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/i386-linux-gnu/libudev.so.1 Reading symbols from /lib/i386-linux-gnu/libgcrypt.so.11...(no debugging symbols found)...done. Loaded symbols for /lib/i386-linux-gnu/libgcrypt.so.11 Reading symbols from /lib/i386-linux-gnu/libdl.so.2...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/libdl-2.19.so...done. done. Loaded symbols for /lib/i386-linux-gnu/libdl.so.2 Reading symbols from /usr/lib/i386-linux-gnu/libpciaccess.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libpciaccess.so.0 Reading symbols from /usr/lib/i386-linux-gnu/libdrm.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libdrm.so.2 Reading symbols from /usr/lib/i386-linux-gnu/libpixman-1.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libpixman-1.so.0 Reading symbols from /usr/lib/i386-linux-gnu/libXfont.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libXfont.so.1 Reading symbols from /usr/lib/i386-linux-gnu/libXau.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libXau.so.6 Reading symbols from /usr/lib/i386-linux-gnu/libxshmfence.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libxshmfence.so.1 Reading symbols from /usr/lib/i386-linux-gnu/libXdmcp.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libXdmcp.so.6 Reading symbols from /lib/i386-linux-gnu/libm.so.6...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/libm-2.19.so...done. done. Loaded symbols for /lib/i386-linux-gnu/libm.so.6 Reading symbols from /lib/i386-linux-gnu/libc.so.6...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/libc-2.19.so...done. done. Loaded symbols for /lib/i386-linux-gnu/libc.so.6 Reading symbols from /lib/i386-linux-gnu/libcgmanager.so.0...(no debugging symbols found)...done. Loaded symbols for /lib/i386-linux-gnu/libcgmanager.so.0 Reading symbols from /lib/i386-linux-gnu/libnih.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/i386-linux-gnu/libnih.so.1 Reading symbols from /lib/i386-linux-gnu/libnih-dbus.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/i386-linux-gnu/libnih-dbus.so.1 Reading symbols from /lib/i386-linux-gnu/libdbus-1.so.3...(no debugging symbols found)...done. Loaded symbols for /lib/i386-linux-gnu/libdbus-1.so.3 Reading symbols from /lib/i386-linux-gnu/librt.so.1...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/librt-2.19.so...done. done. Loaded symbols for /lib/i386-linux-gnu/librt.so.1 Reading symbols from /lib/ld-linux.so.2...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/ld-2.19.so...done. done. Loaded symbols for /lib/ld-linux.so.2 Reading symbols from /lib/i386-linux-gnu/libgpg-error.so.0...(no debugging symbols found)...done. Loaded symbols for /lib/i386-linux-gnu/libgpg-error.so.0 Reading symbols from /lib/i386-linux-gnu/libz.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/i386-linux-gnu/libz.so.1 Reading symbols from /usr/lib/i386-linux-gnu/libfreetype.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libfreetype.so.6 Reading symbols from /lib/i386-linux-gnu/libbz2.so.1.0...(no debugging symbols found)...done. Loaded symbols for /lib/i386-linux-gnu/libbz2.so.1.0 Reading symbols from /usr/lib/i386-linux-gnu/libfontenc.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libfontenc.so.1 Reading symbols from /lib/i386-linux-gnu/libpthread.so.0...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/libpthread-2.19.so...done. done. [New LWP 1232] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1". Loaded symbols for /lib/i386-linux-gnu/libpthread.so.0 Reading symbols from /lib/i386-linux-gnu/libpng12.so.0...(no debugging symbols found)...done. Loaded symbols for /lib/i386-linux-gnu/libpng12.so.0 Reading symbols from /lib/i386-linux-gnu/libgcc_s.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/i386-linux-gnu/libgcc_s.so.1 Reading symbols from /usr/lib/xorg/modules/extensions/libglx.so...Reading symbols from /usr/lib/debug//usr/lib/xorg/modules/extensions/libglx.so...done. done. Loaded symbols for /usr/lib/xorg/modules/extensions/libglx.so Reading symbols from /usr/lib/i386-linux-gnu/mesa/libGL.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/mesa/libGL.so.1 Reading symbols from /lib/i386-linux-gnu/libexpat.so.1...(no debugging symbols found)...done. Loaded symbols for /lib/i386-linux-gnu/libexpat.so.1 Reading symbols from /usr/lib/i386-linux-gnu/libglapi.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libglapi.so.0 Reading symbols from /usr/lib/i386-linux-gnu/libXext.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libXext.so.6 Reading symbols from /usr/lib/i386-linux-gnu/libXdamage.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libXdamage.so.1 Reading symbols from /usr/lib/i386-linux-gnu/libXfixes.so.3...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libXfixes.so.3 Reading symbols from /usr/lib/i386-linux-gnu/libX11-xcb.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libX11-xcb.so.1 Reading symbols from /usr/lib/i386-linux-gnu/libX11.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libX11.so.6 Reading symbols from /usr/lib/i386-linux-gnu/libxcb-glx.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libxcb-glx.so.0 Reading symbols from /usr/lib/i386-linux-gnu/libxcb-dri2.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libxcb-dri2.so.0 Reading symbols from /usr/lib/i386-linux-gnu/libxcb-dri3.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libxcb-dri3.so.0 Reading symbols from /usr/lib/i386-linux-gnu/libxcb-present.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libxcb-present.so.0 Reading symbols from /usr/lib/i386-linux-gnu/libxcb-sync.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libxcb-sync.so.1 Reading symbols from /usr/lib/i386-linux-gnu/libxcb.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libxcb.so.1 Reading symbols from /usr/lib/i386-linux-gnu/libXxf86vm.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libXxf86vm.so.1 Reading symbols from /usr/lib/xorg/modules/drivers/intel_drv.so...Reading symbols from /usr/lib/debug//usr/lib/xorg/modules/drivers/intel_drv.so...done. done. Loaded symbols for /usr/lib/xorg/modules/drivers/intel_drv.so Reading symbols from /usr/lib/i386-linux-gnu/libdrm_intel.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libdrm_intel.so.1 Reading symbols from /usr/lib/i386-linux-gnu/dri/i915_dri.so...Reading symbols from /usr/lib/debug/.build-id/21/513e7956c6b6619a587de2453006b809c96065.debug...done. done. Loaded symbols for /usr/lib/i386-linux-gnu/dri/i915_dri.so Reading symbols from /usr/lib/i386-linux-gnu/libdrm_nouveau.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libdrm_nouveau.so.2 Reading symbols from /usr/lib/i386-linux-gnu/libdrm_radeon.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libdrm_radeon.so.1 Reading symbols from /usr/lib/i386-linux-gnu/libstdc++.so.6...(no debugging symbols found)...done. Traceback (most recent call last): File "/usr/share/gdb/auto-load/usr/lib/i386-linux-gnu/libstdc++.so.6.0.19-gdb.py", line 63, in from libstdcxx.v6.printers import register_libstdcxx_printers ImportError: No module named 'libstdcxx' Loaded symbols for /usr/lib/i386-linux-gnu/libstdc++.so.6 Reading symbols from /usr/lib/xorg/modules/input/evdev_drv.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/input/evdev_drv.so Reading symbols from /usr/lib/i386-linux-gnu/libmtdev.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libmtdev.so.1 Reading symbols from /usr/lib/i386-linux-gnu/libevdev.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/i386-linux-gnu/libevdev.so.2 Reading symbols from /lib/i386-linux-gnu/libnss_compat.so.2...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/libnss_compat-2.19.so...done. done. Loaded symbols for /lib/i386-linux-gnu/libnss_compat.so.2 Reading symbols from /lib/i386-linux-gnu/libnsl.so.1...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/libnsl-2.19.so...done. done. Loaded symbols for /lib/i386-linux-gnu/libnsl.so.1 Reading symbols from /lib/i386-linux-gnu/libnss_nis.so.2...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/libnss_nis-2.19.so...done. done. Loaded symbols for /lib/i386-linux-gnu/libnss_nis.so.2 Reading symbols from /lib/i386-linux-gnu/libnss_files.so.2...Reading symbols from /usr/lib/debug//lib/i386-linux-gnu/libnss_files-2.19.so...done. done. Loaded symbols for /lib/i386-linux-gnu/libnss_files.so.2 0xb74fccb0 in ?? () (gdb) cont Continuing. Program received signal SIGSEGV, Segmentation fault. sna_tiling_composite_spans_box (sna=sna@entry=0xb6264000, op=, box=box@entry=0xbfbecf74, opacity=opacity@entry=0.466666698) at ../../../src/sna/sna_tiling.c:360 360 ../../../src/sna/sna_tiling.c: No such file or directory. (gdb) backtrace full #0 sna_tiling_composite_spans_box (sna=sna@entry=0xb6264000, op=, box=box@entry=0xbfbecf74, opacity=opacity@entry=0.466666698) at ../../../src/sna/sna_tiling.c:360 tile = 0xb8a229e4 a = 0x7000000 #1 0xb6b8b333 in sna_tiling_composite_spans_boxes (sna=0xb6264000, op=0xbfbecf80, box=0xbfbecf7c, nbox=, opacity=0.466666698) at ../../../src/sna/sna_tiling.c:372 No locals. #2 0xb6b6d71a in composite_unaligned_box (clip=0xbfbecf68, opacity=0.466666698, box=0xbfbecf60, tmp=0xbfbecf80, sna=0xb6264000) at ../../../src/sna/sna_trapezoids_boxes.c:351 region = {extents = {x1 = 0, y1 = 0, x2 = 2, y2 = 1}, data = 0x0} #3 composite_unaligned_trap_row (trap=, trap=, clip=0xbfbecf68, covered=, y2=, y1=, dx=0, tmp=0xbfbecf80, sna=0xb6264000) at ../../../src/sna/sna_trapezoids_boxes.c:419 box = {x1 = 0, y1 = 0, x2 = 2, y2 = 1} opacity = x1 = x2 = 2 #4 composite_unaligned_trap (clip=0xbfbecf68, dy=0, dx=0, trap=0xb8a1ee00, tmp=0xbfbecf80, sna=0xb6264000) at ../../../src/sna/sna_trapezoids_boxes.c:459 y1 = 0 y2 = 2266 #5 composite_unaligned_boxes (sna=sna@entry=0xb6264000, op=, op@entry=3 '\003', src=src@entry=0xb8a18430, dst=dst@entry=0xb8a1b768, maskFormat=maskFormat@entry=0xb865e578, src_x=src_x@entry=0, src_y=src_y@entry=0, ntrap=ntrap@entry=1, traps=traps@entry=0xb8a1ee00, force_fallback=force_fallback@entry=false) at ../../../src/sna/sna_trapezoids_boxes.c:1489 extents = tmp = {base = {blt = 0x0, box = 0x0, boxes = 0x0, thread_boxes = 0x0, done = 0x0, damage = 0x0, op = 0, dst = {pixmap = 0x0, format = 0, bo = 0xb8a228e0, x = 0, y = 0, width = 0, height = 0}, src = {bo = 0x0, transform = 0x0, width = 0, height = 0, pict_format = 0, card_format = 0, filter = 0, repeat = 0, is_affine = 0, is_solid = 0, is_linear = 0, is_opaque = 0, alpha_fixup = 0, rb_reversed = 0, offset = {0, 0}, scale = {0, 0}, embedded_transform = {matrix = {{0, 0, 0}, {0, 0, 0}, {0, 0, 0}}}, u = {linear = {dx = 0, dy = 0, offset = 0}, gen2 = {pixel = 0}, gen3 = {type = 0, mode = 0, constants = 0}}}, mask = {bo = 0x0, transform = 0x0, width = 0, height = 0, pict_format = 0, card_format = 0, filter = 0, repeat = 0, is_affine = 0, is_solid = 0, is_linear = 0, is_opaque = 0, alpha_fixup = 0, rb_reversed = 0, offset = {0, 0}, scale = {0, 0}, embedded_transform = {matrix = {{0, 0, 0}, {0, 0, 0}, {0, 0, 0}}}, u = {linear = {dx = 0, dy = 0, offset = 0}, gen2 = {pixel = 0}, gen3 = {type = 0, mode = 0, constants = 0}}}, is_affine = 0, has_component_alpha = 0, need_magic_ca_pass = 0, rb_reversed = 0, floats_per_vertex = 0, floats_per_rect = 0, prim_emit = 0x0, emit_boxes = 0x0, redirect = {real_bo = 0x0, real_damage = 0x0, damage = 0x0, box = { x1 = 0, y1 = 0, x2 = 0, y2 = 0}}, u = {blt = {src_pixmap = 0x0, sx = 0, sy = 0, inplace = 0, overwrites = 0, bpp = 0, alu = 0, cmd = 0, br13 = 0, pitch = {0, 0}, pixel = 0, bo = {0x0, 0x0}}, gen3 = {constants = { 0, 0, 0, 0, 0, 0, 0, 0}, num_constants = 0}, gen4 = {wm_kernel = 0, ve_id = 0}, gen5 = {wm_kernel = 0, ve_id = 0}, gen6 = {flags = 0}, gen7 = {flags = 0}, gen8 = {flags = 0}}, priv = 0xb8a229b0}, box = 0xb6b8b210 , boxes = 0xb6b8b300 , thread_boxes = 0x0, done = 0xb6b8bbf0 , prim_emit = 0x0, emit_boxes = 0x0} clip = {extents = {x1 = 0, y1 = 0, x2 = 3, y2 = 2265}, data = 0x0} c = 0xbfbecf68 dst_x = 0 dst_y = dx = 0 dy = 0 n = 0 #6 0xb6b65f7c in sna_composite_trapezoids (op=3 '\003', src=0xb8a18430, dst=0xb8a1b768, maskFormat=0xb865e578, xSrc=0, ySrc=0, ntrap=1, traps=0xb8a1ee00) at ../../../src/sna/sna_trapezoids.c:664 force_fallback = false rectilinear = true pixel_aligned = flags = 0 n = #7 0xb7635ece in CompositeTrapezoids (op=3 '\003', pSrc=0xb8a18430, pDst=0xb8a1b768, maskFormat=0xb865e578, xSrc=0, ySrc=0, ntrap=1, traps=traps@entry=0xb8a1ee00) at ../../render/picture.c:1591 No locals. #8 0xb763b0cb in ProcRenderTrapezoids (client=0xb89e8530) at ../../render/render.c:759 rc = 0 ntraps = pSrc = 0xb8a18430 pDst = 0xb8a1b768 pFormat = 0xb865e578 stuff = 0xb8a1ede8 #9 0xb763632d in ProcRenderDispatch (client=0xb89e8530) at ../../render/render.c:1989 stuff = #10 0xb755d1bd in Dispatch () at ../../dix/dispatch.c:432 clientReady = 0xb88ab368 result = client = 0xb89e8530 nready = 0 icheck = 0xb7754bb8 start_tick = 1180 #11 0xb75612e5 in dix_main (argc=11, argv=0xbfbed394, envp=0xbfbed3c4) at ../../dix/main.c:298 i = alwaysCheckForInput = {0, 1} #12 0xb754af7e in main (argc=11, argv=0xbfbed394, envp=0xbfbed3c4) at ../../dix/stubmain.c:34 No locals. (gdb) Detaching from program: /usr/bin/Xorg, process 1217