#0  0x00007fb9dd37cedc in util_fill_rect
    (dst=0x7fb9d5a06100 <error: Cannot access memory at address 0x7fb9d5a06100>, format=PIPE_FORMAT_B8G8R8X8_UNORM, dst_stride=4096, dst_x=64, dst_y=0, width=64, height=64, uc=0x7fb9d6cd8af0) at ../src/gallium/auxiliary/util/u_surface.c:199
#1  0x00007fb9dd37cfb4 in util_fill_box
    (dst=0x7fb9d59e7000 <error: Cannot access memory at address 0x7fb9d59e7000>, format=PIPE_FORMAT_B8G8R8X8_UNORM, stride=4096, layer_stride=0, x=64, y=0, z=0, width=64, height=64, depth=1, uc=0x7fb9d6cd8af0)
    at ../src/gallium/auxiliary/util/u_surface.c:233
#2  0x00007fb9dd3a34da in lp_rast_clear_color (task=0x55bd80344a48, arg=...) at ../src/gallium/drivers/llvmpipe/lp_rast.c:156
#3  0x00007fb9dd3a45e2 in do_rasterize_bin (task=0x55bd80344a48, bin=0x7fb9d5c67fa8, x=1, y=0)
    at ../src/gallium/drivers/llvmpipe/lp_rast.c:608
#4  0x00007fb9dd3a4650 in rasterize_bin (task=0x55bd80344a48, bin=0x7fb9d5c67fa8, x=1, y=0)
    at ../src/gallium/drivers/llvmpipe/lp_rast.c:627
#5  0x00007fb9dd3a475f in rasterize_scene (task=0x55bd80344a48, scene=0x7fb9d5c67010)
    at ../src/gallium/drivers/llvmpipe/lp_rast.c:687
#6  0x00007fb9dd3a4a82 in thread_function (init_data=0x55bd80344a48) at ../src/gallium/drivers/llvmpipe/lp_rast.c:828
#7  0x00007fb9dd3a249c in impl_thrd_routine (p=0x55bd80340150) at ../include/c11/threads_posix.h:87
#8  0x00007fb9e1b00a9d in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fb9e1c15b23 in clone () at /usr/lib/libc.so.6