.
Thread 4 (LWP 2146):
#0  0xb7773424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb6dffdeb in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#2  0xb6f43f4b in ?? ()
No symbol table info available.
#3  0xb3900468 in ?? ()
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
.
Thread 3 (LWP 2138):
#0  0xb7773424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb6dffdeb in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#2  0xb6f43f4b in ?? ()
No symbol table info available.
#3  0xb4304288 in ?? ()
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
.
Thread 2 (LWP 2136):
#0  0xb7773424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb6dffdeb in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#2  0xb6f43f4b in ?? ()
No symbol table info available.
#3  0xb5700c78 in ?? ()
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
.
Thread 1 (LWP 2117):
#0  0xb6f3c15a in ?? ()
No symbol table info available.
#1  0xb6b40e96 in ?? () from /tmp/apport_sandbox_mZ6a4Q/usr/lib/i386-linux-gnu/libgdk-3.so.0
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)