(gdb) bt
#0  0x00007f488acbb5c8 in raise () from /lib/libc.so.6
#1  0x00007f488acbca4a in abort () from /lib/libc.so.6
#2  0x0000000000499ee7 in ?? ()
#3  0x0000000000503fac in ?? ()
#4  0x0000000000505484 in ?? ()
#5  <signal handler called>
#6  0x00007f4885040dac in si_set_sampler_view (sctx=sctx@entry=0x5f8c5d0, views=views@entry=0x5f8d6c0, slot=slot@entry=0, view=0x7f4878164350) at si_descriptors.c:206
#7  0x00007f4885040f4f in si_set_sampler_views (ctx=0x5f8c5d0, shader=<optimized out>, start=<optimized out>, count=<optimized out>, views=0x5d71030) at si_descriptors.c:253
#8  0x00007f4884f55f1f in cso_set_sampler_views (ctx=0x5d71010, shader_stage=<optimized out>, count=1, views=<optimized out>) at cso_cache/cso_context.c:1214
#9  0x00007f4884e1b8c1 in try_pbo_upload_common (ctx=ctx@entry=0x6103ac0, surface=0x7f4878164280, xoffset=xoffset@entry=0, yoffset=yoffset@entry=0, upload_width=16, upload_height=16, buffer=0x7f48781641e0, 
    src_format=PIPE_FORMAT_R16G16B16A16_UINT, buf_offset=0, bytes_per_pixel=8, stride=16, image_height=16) at state_tracker/st_cb_texture.c:1364
#10 0x00007f4884e20245 in st_CompressedTexSubImage (ctx=0x6103ac0, dims=2, texImage=0x7f4878162bd0, x=<optimized out>, y=<optimized out>, z=0, w=64, h=64, d=1, format=35917, imageSize=2048, data=0x0) at state_tracker/st_cb_texture.c:2043
#11 0x00007f4884db53c1 in _mesa_compressed_texture_sub_image (ctx=0x6103ac0, dims=2, texObj=0x58748b0, texImage=0x7f4878162bd0, target=3553, level=0, xoffset=0, yoffset=0, zoffset=0, width=64, height=64, depth=1, format=35917, 
    imageSize=2048, data=0x0) at main/teximage.c:4402
#12 0x00007f4884db57b1 in _mesa_CompressedTexSubImage2D (target=3553, level=0, xoffset=0, yoffset=0, width=64, height=64, format=35917, imageSize=2048, data=0x0) at main/teximage.c:4523
#13 0x0000000000b413bf in ?? ()