Got the following crash after issue in SERVER-3043:

Received signal 11
Backtrace: 0x52e235 0x2aefd8f59070 0x2aefd8584219 0x54dcc8 0x61e5c4 0x61e6b8 0x5774d2 0x575630 0x575b31 0x62d61e 0x6312a3 0x66432c 0x6761c7 0x57ea3c 0x69ec30 0x2aefd85821
b5 0x2aefd8ff636d
/usr/bin/mongos(_ZN5mongo17printStackAndExitEi+0x75)[0x52e235]
/lib64/libc.so.6[0x2aefd8f59070]
/lib64/libpthread.so.0(pthread_mutex_lock+0x19)[0x2aefd8584219]
/usr/bin/mongos(_ZNK5mongo17ReplicaSetMonitor8containsERKSs+0x28)[0x54dcc8]
/usr/bin/mongos(_ZNK5mongo5Shard12containsNodeERKSs+0x94)[0x61e5c4]
/usr/bin/mongos(_ZN5mongo5Shard12isAShardNodeERKSs+0xe8)[0x61e6b8]
/usr/bin/mongos(_ZN5mongo17ClientConnections13checkVersionsERKSs+0x1e2)[0x5774d2]
/usr/bin/mongos(_ZN5mongo15ShardConnection5_initEv+0x2d0)[0x575630]
/usr/bin/mongos(_ZN5mongo15ShardConnectionC1ERKNS_5ShardERKSs+0xa1)[0x575b31]
/usr/bin/mongos(_ZN5mongo8Strategy7doQueryERNS_7RequestERKNS_5ShardE+0x4e)[0x62d61e]
/usr/bin/mongos(_ZN5mongo14SingleStrategy7queryOpERNS_7RequestE+0x4a3)[0x6312a3]
/usr/bin/mongos(_ZN5mongo7Request7processEi+0x29c)[0x66432c]
/usr/bin/mongos(_ZN5mongo21ShardedMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE+0x77)[0x6761c7]
/usr/bin/mongos(_ZN5mongo3pms9threadRunEPNS_13MessagingPortE+0x34c)[0x57ea3c]
/usr/bin/mongos(thread_proxy+0x80)[0x69ec30]
/lib64/libpthread.so.0[0x2aefd85821b5]
/lib64/libc.so.6(clone+0x6d)[0x2aefd8ff636d]
===