Starting program: /usr/bin/glxgears 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff34becaf in get_stencil_miptree (irb=0x794990) at brw_misc_state.c:227
227	   if (irb->mt->stencil_mt)
#0  0x00007ffff34becaf in get_stencil_miptree (irb=0x794990) at brw_misc_state.c:227
No locals.
#1  0x00007ffff34bed68 in brw_workaround_depthstencil_alignment (brw=0x7ffff7fa3040, clear_mask=18) at brw_misc_state.c:243
        ctx = 0x7ffff7fa3040
        fb = 0x7943b0
        rebase_depth = false
        rebase_stencil = false
        depth_irb = 0x7948d0
        stencil_irb = 0x794990
        depth_mt = 0x0
        stencil_mt = 0x0
        tile_x = 4078072602
        tile_y = 32767
        stencil_tile_x = 7947184
        stencil_tile_y = 0
        stencil_draw_x = 7947184
        stencil_draw_y = 0
        invalidate_depth = false
        invalidate_stencil = false
        tile_mask_x = 4294956288
        tile_mask_y = 32767
#2  0x00007ffff349fdf1 in brw_clear (ctx=0x7ffff7fa3040, mask=18) at brw_clear.c:233
        brw = 0x7ffff7fa3040
        fb = 0x7943b0
        partial_clear = false
        tri_mask = 32767
#3  0x00007ffff30387be in _mesa_Clear (mask=16640) at main/clear.c:224
        bufferMask = 18
        ctx = 0x7ffff7fa3040
        __func__ = "_mesa_Clear"
        __PRETTY_FUNCTION__ = "_mesa_Clear"
#4  0x000000000040254e in ?? ()
No symbol table info available.
#5  0x0000000000401d44 in ?? ()
No symbol table info available.
#6  0x00007ffff714a610 in __libc_start_main () from /usr/lib/libc.so.6
No symbol table info available.
#7  0x0000000000402329 in ?? ()
No symbol table info available.
quit