(gdb) bt
#0  0x0000002a95676f8b in __lll_mutex_lock_wait () from /lib64/tls/libpthread.so.0
#1  0x00000000007f6c70 in ?? ()
#2  0x00000000007b4900 in ?? ()
#3  0x0000002a95674980 in pthread_cond_destroy@@GLIBC_2.3.2 () from /lib64/tls/libpthread.so.0#4  0x0000002a98e52917 in ~_Rb_tree_impl (this=0x2a95d41680) at /usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../include/c++/3.4.6/bits/stl_tree.h:558
Previous frame inner to this frame (corrupt stack?)
(gdb)