contrail-vrouter-agent crashed at smallbin double linked list corrupted

Logs saved at :http://10.204.216.50/Docs/bugs/<bug-id>

BT
===
#0 0x00007fb142577cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py", line 63, in <module>
    from libstdcxx.v6.printers import register_libstdcxx_printers
ImportError: No module named 'libstdcxx'
(gdb) bt
#0 0x00007fb142577cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007fb14257b0d8 in __GI_abort () at abort.c:89
#2 0x00007fb1425b4394 in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7fb1426c2b28 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
#3 0x00007fb1425bf0f7 in malloc_printerr (action=<optimized out>, str=0x7fb1426c2ef0 "malloc(): smallbin double linked list corrupted", ptr=<optimized out>) at malloc.c:4996
#4 0x00007fb1425c1e04 in _int_malloc (av=0x7fb12c000020, bytes=61) at malloc.c:3359
#5 0x00007fb1425c37b0 in __GI___libc_malloc (bytes=61) at malloc.c:2891
#6 0x00007fb142e80dad in operator new(unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#7 0x00007fb142edc209 in std::string::_Rep::_S_create(unsigned long, unsigned long, std::allocator<char> const&) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#8 0x00007fb142edc396 in std::string::_M_mutate(unsigned long, unsigned long, unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#9 0x00007fb142edc93e in std::string::_M_replace_safe(unsigned long, unsigned long, char const*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#10 0x0000000000c1a1a2 in FlowEntry::Reset() ()
#11 0x0000000000c24b7d in FlowEntryFreeList::Free(FlowEntry*) ()
#12 0x0000000000c18430 in intrusive_ptr_release(FlowEntry*) ()
#13 0x0000000000c2f2cd in FlowEvent::~FlowEvent() ()
#14 0x0000000000c3c421 in FlowProto::FlowEventHandler(FlowEvent*, FlowTable*) ()
#15 0x0000000000c3e8ff in QueueTaskRunner<FlowEvent*, WorkQueue<FlowEvent*> >::Run() ()
#16 0x0000000001193eec in TaskImpl::execute() ()
#17 0x00007fb143146b3a in ?? () from /usr/lib/libtbb.so.2
#18 0x00007fb143142816 in ?? () from /usr/lib/libtbb.so.2
#19 0x00007fb143141f4b in ?? () from /usr/lib/libtbb.so.2
#20 0x00007fb14313e0ff in ?? () from /usr/lib/libtbb.so.2
#21 0x00007fb14313e2f9 in ?? () from /usr/lib/libtbb.so.2
#22 0x00007fb143362182 in start_thread (arg=0x7fb13b7fd700) at pthread_create.c:312