(gdb) bt #0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238 #1 0x00007fb512be9443 in ?? () #2 0x00007fb512bc9d0d in ?? () #3 0x00007fb512bacb0f in ?? () #4 0x00007fb512bbc7d1 in ?? () #5 0x00007fb512baa03a in ?? () #6 0x00007fb51537aea8 in ?? () #7 0x00007fb512b7d045 in ?? () #8 0x00007fb512b7de1e in ?? () #9 0x00007fb512b7cc30 in ?? () #10 0x00007fb512569698 in …