backtrace full:

#0  _mesa_GenTextures (n=256, textures=<optimized out>) at ../../../../src/mesa/main/texobj.c:993
        texObj = <optimized out>
        name = 1871
        target = 0
        ctx = 0x7f2fe6b9c820
        first = <optimized out>
        i = <optimized out>
#1  0x00007f2fe1d1cdb1 in __glXDisp_GenTextures (cl=0x7f2fe61970c8, pc=<optimized out>) at ../../glx/indirect_dispatch.c:2851
        n = 256
        answerBuffer = {32, 2, 3848183981, 32559, 6, 0 <repeats 35 times>, 927249168, 2, 927249216, 32767, 3851804288, 32559, 3851776240, 32559, 1, 0, 3814610605, 32559, 927249296, 32767, 3849193420, 32559, 0, 0, 20000, 0, 0, 0, 20000, 0, 3851804160, 32559, 3849160842, 32559, 6880, 0, 3858728128, 32559, 13, 0, 927249280, 32767, 598, 0, 318905, 0 <repeats 33 times>, 3870895280, 32559, 927249472, 32767, 3888867856, 32559, 130, 0, 0, 1, 3759222493, 32559, 0, 0, 3890764896, 32559, 3759220256, 32559, 1, 0, 151, 149, 16, 48, 927249744, 32767, 927249536, 32767, 64, 0, 1, 0, 31, 0, 3890730336, 32559, 4112, 0, 1, 0 <repeats 33 times>, 3856264576, 32559, 3856267248, 32559, 3851760776, 32559, 3847959988, 32559, 3869918144, 32559, 3851760768, 32559, 3791079488, 32559, 0, 0}
        textures = 0xe7e85c30
        req = <optimized out>
        error = 32559
        cx = <optimized out>
#2  0x00007f2fe1d4b223 in __glXDispatch (client=<optimized out>) at ../../glx/glxext.c:568
        rendering = 0 '\000'
        stuff = 0x7f2fe7e7d560
        opcode = 145 '\221'
        proc = <optimized out>
        cl = 0x7f2fe61970c8
        retval = <optimized out>
#3  0x00007f2fe55aee61 in Dispatch () at ../../dix/dispatch.c:428
        clientReady = 0x7f2fe5ff84c0
        result = <optimized out>
        client = 0x7f2fe6196f80
        nready = 0
        icheck = 0x7f2fe59570f0 <checkForInput>
        start_tick = 820
#4  0x00007f2fe559dec5 in main (argc=10, argv=0x7fff3744b788, envp=<optimized out>) at ../../dix/main.c:288
        i = <optimized out>
        alwaysCheckForInput = {0, 1}

info registers:

rax            0x0	0
rbx            0x74f	1871
rcx            0x7f2fe7e86040	139843730956352
rdx            0x7f2fe6b92db0	139843711086000
rsi            0x0	0
rdi            0x0	0
rbp            0x7f2fe6b9c820	0x7f2fe6b9c820
rsp            0x7fff3744b210	0x7fff3744b210
r8             0x74f	1871
r9             0x2a9d	10909
r10            0x0	0
r11            0x7f2fe357225c	139843654328924
r12            0xe7e85c34	3890764852
r13            0x84f	2127
r14            0x100	256
r15            0x7f2fe59570f0	139843691966704
rip            0x7f2fe015e7a7	0x7f2fe015e7a7 <_mesa_GenTextures+103>
eflags         0x13246	[ PF ZF IF #12 #13 RF ]
cs             0x33	51
ss             0x2b	43
ds             0x0	0
es             0x0	0
fs             0x0	0
gs             0x0	0

x/16i $pc:

=> 0x7f2fe015e7a7 <_mesa_GenTextures+103>:	mov    %ebx,-0x4(%r12)
   0x7f2fe015e7ac <_mesa_GenTextures+108>:	add    $0x1,%ebx
   0x7f2fe015e7af <_mesa_GenTextures+111>:	cmp    %r13d,%ebx
   0x7f2fe015e7b2 <_mesa_GenTextures+114>:	je     0x7f2fe015e7f0 <_mesa_GenTextures+176>
   0x7f2fe015e7b4 <_mesa_GenTextures+116>:	xor    %edx,%edx
   0x7f2fe015e7b6 <_mesa_GenTextures+118>:	mov    %ebx,%esi
   0x7f2fe015e7b8 <_mesa_GenTextures+120>:	mov    %rbp,%rdi
   0x7f2fe015e7bb <_mesa_GenTextures+123>:	callq  *0x1d8(%rbp)
   0x7f2fe015e7c1 <_mesa_GenTextures+129>:	test   %rax,%rax
   0x7f2fe015e7c4 <_mesa_GenTextures+132>:	jne    0x7f2fe015e790 <_mesa_GenTextures+80>
   0x7f2fe015e7c6 <_mesa_GenTextures+134>:	mov    0x0(%rbp),%rdi
   0x7f2fe015e7ca <_mesa_GenTextures+138>:	callq  0x7f2fe00a9a30 <pthread_mutex_unlock@plt>
   0x7f2fe015e7cf <_mesa_GenTextures+143>:	lea    0x254498(%rip),%rdx        # 0x7f2fe03b2c6e
   0x7f2fe015e7d6 <_mesa_GenTextures+150>:	mov    $0x505,%esi
   0x7f2fe015e7db <_mesa_GenTextures+155>:	pop    %rbx
   0x7f2fe015e7dc <_mesa_GenTextures+156>:	mov    %rbp,%rdi

thead apply all backtrace:

Thread 2 (Thread 0x7f2fde3a8700 (LWP 10913)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f2fe038182b in pipe_semaphore_wait (sema=0x7f2fe5dab4a0) at ../../../../../../../src/gallium/auxiliary/os/os_thread.h:433
#2  radeon_drm_cs_emit_ioctl (param=0x7f2fe5dab2c0) at radeon_drm_winsys.c:521
#3  0x00007f2fe4888e0e in start_thread (arg=0x7f2fde3a8700) at pthread_create.c:311
#4  0x00007f2fe35d393d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f2fe5520880 (LWP 10909)):
#0  _mesa_GenTextures (n=256, textures=<optimized out>) at ../../../../src/mesa/main/texobj.c:993
#1  0x00007f2fe1d1cdb1 in __glXDisp_GenTextures (cl=0x7f2fe61970c8, pc=<optimized out>) at ../../glx/indirect_dispatch.c:2851
#2  0x00007f2fe1d4b223 in __glXDispatch (client=<optimized out>) at ../../glx/glxext.c:568
#3  0x00007f2fe55aee61 in Dispatch () at ../../dix/dispatch.c:428
#4  0x00007f2fe559dec5 in main (argc=10, argv=0x7fff3744b788, envp=<optimized out>) at ../../dix/main.c:288
A debugging session is active.

	Inferior 1 [process 10909] will be detached.

Quit anyway? (y or n) Detaching from program: /usr/bin/Xorg, process 10909