.
Thread 2 (Thread 12221):
#0  0x00007f7a6fec53c2 in select () from /lib/libc.so.6
No symbol table info available.
#1  0x00007f7a712c4b20 in ?? () from /usr/lib/libtcl8.5.so.0
No symbol table info available.
#2  0x00007f7a70fd3a04 in start_thread (arg=<value optimized out>)
    at pthread_create.c:300
        __res = <value optimized out>
        pd = 0x7f7a6caa9910
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140163785857296, 
                7464437572799786516, 140733559974128, 0, 0, 3, 
                -7393825122298139116, -7393815925979648492}, 
              mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, 
            data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <value optimized out>
        robust = <value optimized out>
#3  0x00007f7a6fecc7bd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#4  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 12219):
#0  0x00007f7a6d8f2b19 in ?? () from /usr/lib/libGLcore.so.1
No symbol table info available.
#1  0x00007f7a6d8f8a83 in ?? () from /usr/lib/libGLcore.so.1
No symbol table info available.
#2  0x00007f7a6d9013b2 in ?? () from /usr/lib/libGLcore.so.1
No symbol table info available.
#3  0x00007f7a6d9cb095 in ?? () from /usr/lib/libGLcore.so.1
No symbol table info available.
#4  0x00007f7a6d9baeeb in ?? () from /usr/lib/libGLcore.so.1
No symbol table info available.
#5  0x00007f7a6d9c0553 in ?? () from /usr/lib/libGLcore.so.1
No symbol table info available.
#6  0x00007f7a6d9c1e71 in ?? () from /usr/lib/libGLcore.so.1
No symbol table info available.
#7  0x00007f7a6d9c24bf in ?? () from /usr/lib/libGLcore.so.1
No symbol table info available.
#8  0x00007f7a7150e79e in ?? () from /usr/lib/libGLU.so.1
No symbol table info available.
#9  0x00007f7a71515ec3 in gluBuild2DMipmaps () from /usr/lib/libGLU.so.1
No symbol table info available.
#10 0x000000000045987b in ?? ()
No symbol table info available.
#11 0x0000000000459c39 in ?? ()
No symbol table info available.
#12 0x00007f7a7121580f in TclInvokeStringCommand ()
   from /usr/lib/libtcl8.5.so.0
No symbol table info available.
#13 0x00007f7a712172f1 in ?? () from /usr/lib/libtcl8.5.so.0
No symbol table info available.
#14 0x00007f7a71217a5f in ?? () from /usr/lib/libtcl8.5.so.0
No symbol table info available.
#15 0x00007f7a7127f271 in Tcl_FSEvalFileEx () from /usr/lib/libtcl8.5.so.0
No symbol table info available.
#16 0x00007f7a71228cb5 in ?? () from /usr/lib/libtcl8.5.so.0
No symbol table info available.
#17 0x00007f7a712172f1 in ?? () from /usr/lib/libtcl8.5.so.0
No symbol table info available.
#18 0x00007f7a71217a5f in ?? () from /usr/lib/libtcl8.5.so.0
No symbol table info available.
#19 0x00007f7a7127f271 in Tcl_FSEvalFileEx () from /usr/lib/libtcl8.5.so.0
No symbol table info available.
#20 0x00007f7a7127dc8f in Tcl_EvalFile () from /usr/lib/libtcl8.5.so.0
No symbol table info available.
#21 0x000000000043c034 in ?? ()
No symbol table info available.
#22 0x000000000043c3dd in ?? ()
No symbol table info available.
#23 0x00007f7a6fe0babd in __libc_start_main (main=<value optimized out>, 
    argc=<value optimized out>, ubp_av=<value optimized out>, 
    init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=0x7fff15d9ab58)
    at libc-start.c:220
        result = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 7464437572799786516, 
                4226112, 140733559974752, 0, 0, -7464388866348192236, 
                -7393822424317333996}, mask_was_saved = 0}}, priv = {pad = {
              0x0, 0x0, 0x47ddc0, 0x7fff15d9ab68}, data = {prev = 0x0, 
              cleanup = 0x0, canceltype = 4709824}}}
        not_first_call = <value optimized out>
#24 0x0000000000407c69 in ?? ()
No symbol table info available.
#25 0x00007fff15d9ab58 in ?? ()
No symbol table info available.
#26 0x000000000000001c in ?? ()
No symbol table info available.
#27 0x0000000000000001 in ?? ()
No symbol table info available.
#28 0x00007fff15d9bb9a in ?? ()
No symbol table info available.
#29 0x0000000000000000 in ?? ()
No symbol table info available.