SIGSEGV in _XPutPixel32 on armhf

[Edit Balint]

I'm running Ubuntu 12.04 on a Pandaboard 4430 (armhf). (I also tested it on 13.04 Ubuntu, and the same error occurs.)
Servo (experimental browser engine by Mozilla) and this little example: http://sil2100.vexillium.org/content/fglrx-test.c are crashing with the same backtrace: (They're both calling the glXBindTexImageEXT function.)

fglrx_test.c segfault backtrace:
#0 _XPutPixel32 (pixel=49344, y=<optimized out>, x=<optimized out>, ximage=0x210378) at ../../src/ImUtil.c:739
#1 _XPutPixel32 (ximage=0x210378, x=<optimized out>, y=<optimized out>, pixel=49344) at ../../src/ImUtil.c:726
#2 0xb6f00960 in _XSetImage (srcimg=0x220aa8, dstimg=0x210378, x=0, y=0) at ../../src/ImUtil.c:957
#3 0xb6efe25c in XGetSubImage (dpy=<optimized out>, d=<optimized out>, x=<optimized out>, y=<optimized out>, width=64, height=64, plane_mask=4294967295, format=2,
    dest_image=0x210378, dest_x=0, dest_y=0) at ../../src/GetImage.c:129
#4 0xb6ecd408 in swrastGetImage (read=<optimized out>, x=<optimized out>, y=<optimized out>, w=<optimized out>, h=64, data=0x0, loaderPrivate=0x2100b8) at drisw_glx.c:228
#5 0xb6fd651a in swrastSetTexBuffer2 (pDRICtx=<optimized out>, target=<optimized out>, texture_format=<optimized out>, dPriv=<optimized out>) at swrast.c:97
#6 0xb6ecd4f6 in drisw_bind_tex_image (dpy=<optimized out>, drawable=<optimized out>, buffer=<optimized out>, attrib_list=<optimized out>) at drisw_glx.c:319
#7 0xb6eb4ff4 in __glXBindTexImageEXT (dpy=<optimized out>, drawable=<optimized out>, buffer=<optimized out>, attrib_list=<optimized out>) at glxcmds.c:2429
#8 0x00009638 in main () at fglrx_test.c:218

SERVO segfault backtrace:
#0 _XPutPixel32 (pixel=8388608, y=<optimized out>, x=<optimized out>, ximage=0x3f0d48) at ../../src/ImUtil.c:739
#1 _XPutPixel32 (ximage=0x3f0d48, x=<optimized out>, y=<optimized out>, pixel=8388608) at ../../src/ImUtil.c:726
#2 0xb53a8960 in _XSetImage (srcimg=0x3f0dd0, dstimg=0x3f0d48, x=0, y=0) at ../../src/ImUtil.c:957
#3 0xb53a625c in XGetSubImage (dpy=<optimized out>, d=<optimized out>, x=<optimized out>, y=<optimized out>, width=512, height=512, plane_mask=4294967295, format=2,
    dest_image=0x3f0d48, dest_x=0, dest_y=0) at ../../src/GetImage.c:129
#4 0xb54a2408 in swrastGetImage (read=<optimized out>, x=<optimized out>, y=<optimized out>, w=<optimized out>, h=512, data=0x0, loaderPrivate=0x3aa8f0) at drisw_glx.c:228
#5 0xb4a5351a in swrastSetTexBuffer2 (pDRICtx=<optimized out>, target=<optimized out>, texture_format=<optimized out>, dPriv=<optimized out>) at swrast.c:97
#6 0xb54a24f6 in drisw_bind_tex_image (dpy=<optimized out>, drawable=<optimized out>, buffer=<optimized out>, attrib_list=<optimized out>) at drisw_glx.c:319
#7 0xb5489ff4 in __glXBindTexImageEXT (dpy=<optimized out>, drawable=<optimized out>, buffer=<optimized out>, attrib_list=<optimized out>) at glxcmds.c:2429
#8 0xb65ede5c in bind () at /home/ebalint/Work/armhf/servo-arm3/servo/src/support/layers/rust-layers/texturegl.rs:146
#9 layers::platform::linux::surface::NativeSurfaceMethods$NativeSurface::bind_to_texture ()

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Connor Imes (ckimes)]

I can confirm this issue on an ODROID-XU3. There should be enough information here for a developer to have a look.

Moving to libx11 package.

Here is the latest backtrace from Servo running on Ubuntu 14.04.3 with libx11-6 version 2:1.6.2-1ubuntu2.

#0 0xb6c0c7d8 in _XPutPixel32 (ximage=0x2dace068, x=<optimized out>,
    y=<optimized out>, pixel=0) at ../../src/ImUtil.c:733
#1 0xb6c0cc22 in _XSetImage (srcimg=srcimg@entry=0x2dacde40,
    dstimg=dstimg@entry=0x2dace068, x=x@entry=0, y=y@entry=0)
    at ../../src/ImUtil.c:949
#2 0xb6c0a400 in XGetSubImage (dpy=<optimized out>, d=<optimized out>,
    x=<optimized out>, y=<optimized out>, width=width@entry=288,
    height=height@entry=512, plane_mask=plane_mask@entry=4294967295,
    format=format@entry=2, dest_image=dest_image@entry=0x2dace068,
    dest_x=dest_x@entry=0, dest_y=dest_y@entry=0) at ../../src/GetImage.c:129
#3 0xb6d1c804 in swrastGetImage (read=<optimized out>, x=<optimized out>,
    y=<optimized out>, w=288, h=512, data=0x0, loaderPrivate=0x2daa3998)
    at ../../../../src/glx/drisw_glx.c:237
#4 0xb4a58ab2 in swrastSetTexBuffer2 (pDRICtx=<optimized out>,
    target=<optimized out>, texture_format=8410, dPriv=<optimized out>)
    at ../../../../../../../src/mesa/drivers/dri/swrast/swrast.c:100
#5 0xb6d1c6a2 in drisw_bind_tex_image (dpy=<optimized out>,
    drawable=<optimized out>, buffer=<optimized out>,
    attrib_list=<optimized out>) at ../../../../src/glx/drisw_glx.c:328
#6 0xb6d00e88 in __glXBindTexImageEXT (dpy=<optimized out>,
    drawable=<optimized out>, buffer=<optimized out>,
    attrib_list=<optimized out>) at ../../../../src/glx/glxcmds.c:2416
#7 0x2c43d530 in layers::platform::linux::surface::PixmapNativeSurface::bind_to_texture (self=0xa781f0a4, display=0xbeffe2f8, texture=0xb5c750a8)
    at /home/odroid/.cargo/git/checkouts/rust-layers-22b481e3852f313f/master/src/platform/linux/surface.rs:218
#8 0x2c420c44 in layers::platform::surface::NativeSurface::bind_to_texture (
    self=0xa781f0a0, display=0xbeffe2f8, texture=0xb5c750a8)
    at /home/odroid/.cargo/git/checkouts/rust-layers-22b481e3852f313f/master/src/platform/surface.rs:82
#9 0x2c420a84 in layers::tiling::Tile::create_texture (self=0xb5c7509c,
    display=0xbeffe2f8)
    at /home/odroid/.cargo/git/checkouts/rust-layers-22b481e3852f313f/master/src/tiling.rs:82
#10 0x2c434d40 in layers::tiling::TileGrid::create_textures (self=0xb5c676e8,
    display=0xbeffe2f8)
    at /home/odroid/.cargo/git/checkouts/rust-layers-22b481e3852f313f/master/src/tiling.rs:331
#11 0x2a2037a4 in servo::layers::Layer<T>::create_textures (self=0xb5c67608,
    display=0xbeffe2f8)
    at /home/odroid/.cargo/git/checkouts/rust-layers-22b481e3852f313f/master/src/layers.rs:175
#12 0x2a203008 in servo::rendergl::RenderContext::render_layer<compositing::compositor_layer::CompositorData> (self=0xbeffe298, layer=...,
    transform=0xbeffe23c, projection=0xbeffe1b4, clip_rect=...,
    gfx_context=0xbeffe2f8)
    at /home/odroid/.cargo/git/checkouts/rust-layers-22b481e3852f313f/master/src/rendergl.rs:589
#13 0x2a1ffd38 in servo::rendergl::RenderContext::render_3d_context<com...