^C
Program received signal SIGINT, Interrupt.
0x00007ffff061b6ad in pthread_join (threadid=140736233469696, thread_return=0x7fffffffbd70) at pthread_join.c:90
90	    lll_wait_tid (pd->tid);
(gdb) backtrace 
#0  0x00007ffff061b6ad in pthread_join (threadid=140736233469696, thread_return=0x7fffffffbd70) at pthread_join.c:90
#1  0x00007fffb5457323 in lp_rast_destroy () at /usr/lib64/gallium-pipe/pipe_swrast.so
#2  0x00007fffb5462e81 in llvmpipe_destroy_screen () at /usr/lib64/gallium-pipe/pipe_swrast.so
#3  0x00007fffb64e5719 in clover::device::device(clover::platform&, pipe_loader_device*) () at /lib64/libMesaOpenCL.so.1
#4  0x00007fffb64f13e6 in clover::platform::platform() () at /lib64/libMesaOpenCL.so.1
#5  0x00007fffb64bcfe6 in _GLOBAL__sub_I_platform.cpp () at /lib64/libMesaOpenCL.so.1
#6  0x00007ffff7deb79a in call_init (l=<optimized out>, argc=argc@entry=1, argv=argv@entry=0x7fffffffdcf8, env=env@entry=0x7fffffffdd08) at dl-init.c:72
#7  0x00007ffff7deb8ab in _dl_init (env=0x7fffffffdd08, argv=0x7fffffffdcf8, argc=1, l=<optimized out>) at dl-init.c:30
#8  0x00007ffff7deb8ab in _dl_init (main_map=main_map@entry=0x7fffc0ba0f00, argc=1, argv=0x7fffffffdcf8, env=0x7fffffffdd08) at dl-init.c:120
#9  0x00007ffff7df02b3 in dl_open_worker (a=a@entry=0x7fffffffc148) at dl-open.c:564
#10 0x00007ffff7deb644 in _dl_catch_error (objname=objname@entry=0x7fffffffc138, errstring=errstring@entry=0x7fffffffc140, mallocedp=mallocedp@entry=0x7fffffffc137, operate=operate@entry=0x7ffff7defdb0 <dl_open_worker>, args=args@entry=0x7fffffffc148) at dl-error.c:187
#11 0x00007ffff7def703 in _dl_open (file=0x7fffc0ac0640 "libMesaOpenCL.so.1", mode=-2147483647, caller_dlopen=0x7fffbc779906 <_load_icd+107>, nsid=-2, argc=<optimized out>, argv=<optimized out>, env=0x7fffffffdd08) at dl-open.c:649
#12 0x00007ffff040ffc9 in dlopen_doit (a=a@entry=0x7fffffffc360) at dlopen.c:66
#13 0x00007ffff7deb644 in _dl_catch_error (objname=0x7fffde130ff0, errstring=0x7fffde130ff8, mallocedp=0x7fffde130fe8, operate=0x7ffff040ff70 <dlopen_doit>, args=0x7fffffffc360) at dl-error.c:187
#14 0x00007ffff0410631 in _dlerror_run (operate=operate@entry=0x7ffff040ff70 <dlopen_doit>, args=args@entry=0x7fffffffc360) at dlerror.c:163
#15 0x00007ffff0410061 in __dlopen (file=<optimized out>, mode=<optimized out>) at dlopen.c:87
#16 0x00007fffbc779906 in _load_icd () at /lib64/libOpenCL.so
#17 0x00007fffbc779bdc in _open_driver () at /lib64/libOpenCL.so
#18 0x00007fffbc77afd8 in _initClIcd_real () at /lib64/libOpenCL.so
#19 0x00007fffbc77b64c in clGetPlatformIDs () at /lib64/libOpenCL.so
#20 0x00000000017bae08 in ccl::(anonymous namespace)::opencl_get_usable_devices(ccl::vector<ccl::OpenCLPlatformDevice>*) [clone .constprop.438] ()
#21 0x00000000017bd24e in ccl::device_opencl_info(ccl::vector<ccl::DeviceInfo>&) ()
#22 0x00000000017a0a0c in ccl::Device::available_devices() ()
#23 0x00000000016f9e66 in ccl::compute_device_list(ccl::DeviceType) ()
#24 0x00000000011f88a1 in rna_userdef_compute_device_type_itemf ()
#25 0x00000000010fdf27 in RNA_property_enum_items ()
#26 0x0000000001104db6 in RNA_property_enum_identifier ()
#27 0x0000000000d3405b in pyrna_enum_to_py ()
#28 0x0000000000d3d960 in pyrna_prop_to_py ()
#29 0x0000000000d3da3f in pyrna_struct_getattro ()
#30 0x00007ffff76105a7 in builtin_hasattr () at /lib64/libpython3.4m.so.1.0
#31 0x00007ffff761c651 in PyEval_EvalFrameEx () at /lib64/libpython3.4m.so.1.0
#32 0x00007ffff761d636 in PyEval_EvalCodeEx () at /lib64/libpython3.4m.so.1.0
#33 0x00007ffff758d728 in function_call () at /lib64/libpython3.4m.so.1.0
#34 0x00007ffff7564db1 in PyObject_Call () at /lib64/libpython3.4m.so.1.0
#35 0x0000000000d3cb5e in bpy_class_call ()
#36 0x00000000011e9a6f in panel_draw ()
#37 0x0000000000c15890 in ED_region_panels ()
#38 0x0000000000c1490f in ED_region_do_draw ()
#39 0x000000000095f654 in wm_method_draw_overlap_all ()
#40 0x0000000000960c8c in wm_draw_update ()
#41 0x000000000095c558 in WM_main ()
#42 0x000000000093d060 in main ()