.
Thread 1 (process 21700):
#0  0x00007fd9f0227d0a in ?? () from /usr/lib/libGL.so.1
#1  0x00007fd9f021ea92 in ?? () from /usr/lib/libGL.so.1
#2  0x00007ffff83a7ba0 in ?? ()
#3  0x00007fd9f0264761 in ?? () from /usr/lib/libGL.so.1
#4  0x0000000000000017 in ?? ()
#5  0x00007fd9f01992b4 in ?? () from /lib64/ld-linux-x86-64.so.2
Backtrace stopped: previous frame inner to this frame (corrupt stack?)