. Thread 1 (Thread 0x7f484ff82740 (LWP 12384)): #0 0x00007f484f9454bc in ?? () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1 No symbol table info available. #1 0x00007f484f941bf8 in ?? () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1 No symbol table info available. #2 0x00007f484f941eed in glXChooseVisual () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1 No symbol table info available. #3 0x0000000000400c20 in ?? () No symbol table info available. #4 0x00007f484f25576d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #5 0x0000000000400eb5 in ?? () No symbol table info available. #6 0x00007fffd63f3b78 in ?? () No symbol table info available. #7 0x000000000000001c in ?? () No symbol table info available. #8 0x0000000000000001 in ?? () No symbol table info available. #9 0x00007fffd63f5be3 in ?? () No symbol table info available. #10 0x0000000000000000 in ?? () No symbol table info available.