.
Thread 4 (LWP 1863):
#0  0x00007f6d7edf874d in ?? () from /tmp/apport_sandbox_oikPsu/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 3 (LWP 1862):
#0  0x00007f6d7edf874d in ?? () from /tmp/apport_sandbox_oikPsu/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (LWP 1861):
#0  0x00007f6d7edf874d in ?? () from /tmp/apport_sandbox_oikPsu/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (LWP 1860):
#0  0x00007f6d71c38845 in ?? () from /tmp/apport_sandbox_oikPsu/usr/lib/nvidia-331/libnvidia-glcore.so.331.38
No symbol table info available.
#1  0x00007f6d71847936 in ?? () from /tmp/apport_sandbox_oikPsu/usr/lib/nvidia-331/libnvidia-glcore.so.331.38
No symbol table info available.
#2  0x00007f6d71852266 in ?? () from /tmp/apport_sandbox_oikPsu/usr/lib/nvidia-331/libnvidia-glcore.so.331.38
No symbol table info available.
#3  0x00007f6d7195fe10 in ?? () from /tmp/apport_sandbox_oikPsu/usr/lib/nvidia-331/libnvidia-glcore.so.331.38
No symbol table info available.
#4  0x00007f6d7194665a in ?? () from /tmp/apport_sandbox_oikPsu/usr/lib/nvidia-331/libnvidia-glcore.so.331.38
No symbol table info available.
#5  0x00007f6d71949c2a in ?? () from /tmp/apport_sandbox_oikPsu/usr/lib/nvidia-331/libnvidia-glcore.so.331.38
No symbol table info available.
#6  0x00007f6d7194a1e7 in ?? () from /tmp/apport_sandbox_oikPsu/usr/lib/nvidia-331/libnvidia-glcore.so.331.38
No symbol table info available.
#7  0x00007f6d66a527c4 in CopyPixmap::~CopyPixmap() () from /tmp/apport_sandbox_oikPsu/usr/lib/compiz/libcopytex.so
No symbol table info available.
#8  0x0000000000000000 in ?? ()
No symbol table info available.