.
Thread 2 (process 1403):
#0  0x0075d416 in __kernel_vsyscall ()
No symbol table info available.
#1  0x004eee96 in *__GI___poll (fds=0x89708c8, nfds=1, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:87
	resultvar = <value optimized out>
	oldtype = -516
	result = <value optimized out>
#2  0xffffffff in ?? ()
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
.
Thread 1 (process 1382):
#0  0x0075d416 in __kernel_vsyscall ()
No symbol table info available.
#1  0x00457cb1 in *__GI_raise (sig=6)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
	resultvar = <value optimized out>
	resultvar = <value optimized out>
	pid = 5808116
	selftid = 1382
#2  0x0045b18e in *__GI_abort () at abort.c:59
	save_stage = Unhandled dwarf expression opcode 0x9f