mongoexport fails on mac

error:
2017-02-13T12:16:57.071+0530 [........................] <XXXX.XXXXX> 0/453 (0.0%)
failed MSpanList_Insert 0x52e038 0xc49fc6bb4e59 0x0
fatal error: MSpanList_Insert

runtime stack:
runtime.MSpanList_Insert(0x479068, 0x52e038)
/usr/local/go/src/runtime/mheap.c:692 +0x8f
runtime.MHeap_FreeStack(0x475c60, 0x52e038)
/usr/local/go/src/runtime/mheap.c:518 +0x9f

goroutine 1 [stack growth]:
gopkg.in/mgo.v2/bson.(*decoder).readElemTo(0xc2081045a0, 0x232e20, 0xc208196770, 0xd4, 0xc208196708, 0xd4)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:440 fp=0xc2081b4368 sp=0xc2081b4360
gopkg.in/mgo.v2/bson.func- 001(0xc208104508, 0xc2080b2ae9, 0x5)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:378 +0x150 fp=0xc2081b4458 sp=0xc2081b4368
gopkg.in/mgo.v2/bson.(*decoder).readDocWith(0xc2081045a0, 0xc2081b4550)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:417 +0x14c fp=0xc2081b44b0 sp=0xc2081b4458
gopkg.in/mgo.v2/bson.(*decoder).readDocElems(0xc2081045a0, 0x518898, 0x29ae40, 0x0, 0x0, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:381 +0x125 fp=0xc2081b4570 sp=0xc2081b44b0
gopkg.in/mgo.v2/bson.(*decoder).readDocTo(0xc2081045a0, 0x29ae40, 0xc208196720, 0xd7)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:217 +0x14dd fp=0xc2081b4828 sp=0xc2081b4570
gopkg.in/mgo.v2/bson.(*decoder).readElemTo(0xc2081045a0, 0x232e20, 0xc208196710, 0xd4, 0xc208196703, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:450 +0x150 fp=0xc2081b4c10 sp=0xc2081b4828
gopkg.in/mgo.v2/bson.func- 001(0xc208104503, 0xc2080b2b00, 0xd)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:378 +0x150 fp=0xc2081b4d00 sp=0xc2081b4c10
gopkg.in/mgo.v2/bson.(*decoder).readDocWith(0xc2081045a0, 0xc2081b4df8)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:417 +0x14c fp=0xc2081b4d58 sp=0xc2081b4d00
gopkg.in/mgo.v2/bson.(*decoder).readDocElems(0xc2081045a0, 0x518898, 0x29ae40, 0x0, 0x0, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:381 +0x125 fp=0xc2081b4e18 sp=0xc2081b4d58
gopkg.in/mgo.v2/bson.(*decoder).readDocTo(0xc2081045a0, 0x29ae40, 0xc2081963c0, 0xd7)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:217 +0x14dd fp=0xc2081b50d0 sp=0xc2081b4e18
gopkg.in/mgo.v2/bson.(*decoder).readElemTo(0xc2081045a0, 0x232e20, 0xc2081963b0, 0xd4, 0xc208196303, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:450 +0x150 fp=0xc2081b54b8 sp=0xc2081b50d0
gopkg.in/mgo.v2/bson.func- 001(0xc208104503, 0xc2080b28d0, 0xa)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:378 +0x150 fp=0xc2081b55a8 sp=0xc2081b54b8
gopkg.in/mgo.v2/bson.(*decoder).readDocWith(0xc2081045a0, 0xc2081b56a0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:417 +0x14c fp=0xc2081b5600 sp=0xc2081b55a8
gopkg.in/mgo.v2/bson.(*decoder).readDocElems(0xc2081045a0, 0x518898, 0x29ae40, 0x0, 0x0, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:381 +0x125 fp=0xc2081b56c0 sp=0xc2081b5600
gopkg.in/mgo.v2/bson.(*decoder).readDocTo(0xc2081045a0, 0x29ae40, 0xc208196340, 0xd7)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:217 +0x14dd fp=0xc2081b5978 sp=0xc2081b56c0
gopkg.in/mgo.v2/bson.(*decoder).readElemTo(0xc2081045a0, 0x232e20, 0xc2080b28a0, 0xd4, 0xc2080b2803, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:450 +0x150 fp=0xc2081b5d60 sp=0xc2081b5978
gopkg.in/mgo.v2/bson.(*decoder).readSliceDoc(0xc2081045a0, 0x518898, 0x229fa0, 0x0, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:348 +0x38e fp=0xc2081b5f40 sp=0xc2081b5d60
gopkg.in/mgo.v2/bson.(*decoder).readElemTo(0xc2081045a0, 0x232e20, 0xc208196330, 0xd4, 0xc208196304, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:496 +0x2e37 fp=0xc2081b6328 sp=0xc2081b5f40
gopkg.in/mgo.v2/bson.func- 001(0xc208104504, 0xc2080b2878, 0x8)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:378 +0x150 fp=0xc2081b6418 sp=0xc2081b6328
gopkg.in/mgo.v2/bson.(*decoder).readDocWith(0xc2081045a0, 0xc2081b6510)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:417 +0x14c fp=0xc2081b6470 sp=0xc2081b6418
gopkg.in/mgo.v2/bson.(*decoder).readDocElems(0xc2081045a0, 0x518898, 0x29ae40, 0x0, 0x0, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:381 +0x125 fp=0xc2081b6530 sp=0xc2081b6470
gopkg.in/mgo.v2/bson.(*decoder).readDocTo(0xc2081045a0, 0x29ae40, 0xc2081962a0, 0xd7)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:217 +0x14dd fp=0xc2081b67e8 sp=0xc2081b6530
gopkg.in/mgo.v2/bson.(*decoder).readElemTo(0xc2081045a0, 0x232e20, 0xc208196290, 0xd4, 0xc208196203, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:450 +0x150 fp=0xc2081b6bd0 sp=0xc2081b67e8
gopkg.in/mgo.v2/bson.func- 001(0xc208104503, 0xc2080b2860, 0xc)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:378 +0x150 fp=0xc2081b6cc0 sp=0xc2081b6bd0
gopkg.in/mgo.v2/bson.(*decoder).readDocWith(0xc2081045a0, 0xc2081b6db8)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:417 +0x14c fp=0xc2081b6d18 sp=0xc2081b6cc0
gopkg.in/mgo.v2/bson.(*decoder).readDocElems(0xc2081045a0, 0x518898, 0x29ae40, 0x0, 0x0, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:381 +0x125 fp=0xc2081b6dd8 sp=0xc2081b6d18
gopkg.in/mgo.v2/bson.(*decoder).readDocTo(0xc2081045a0, 0x29ae40, 0xc2081961e0, 0xd7)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:217 +0x14dd fp=0xc2081b7090 sp=0xc2081b6dd8
gopkg.in/mgo.v2/bson.(*decoder).readElemTo(0xc2081045a0, 0x232e20, 0xc2081961d0, 0xd4, 0xc208196103, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:450 +0x150 fp=0xc2081b7478 sp=0xc2081b7090
gopkg.in/mgo.v2/bson.func- 001(0xc208104503, 0xc2080b2840, 0x4)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:378 +0x150 fp=0xc2081b7568 sp=0xc2081b7478
gopkg.in/mgo.v2/bson.(*decoder).readDocWith(0xc2081045a0, 0xc2081b7660)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:417 +0x14c fp=0xc2081b75c0 sp=0xc2081b7568
gopkg.in/mgo.v2/bson.(*decoder).readDocElems(0xc2081045a0, 0x518898, 0x29ae40, 0x0, 0x0, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:381 +0x125 fp=0xc2081b7680 sp=0xc2081b75c0
gopkg.in/mgo.v2/bson.(*decoder).readDocTo(0xc2081045a0, 0x29ae40, 0xc208102260, 0xd7)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/decode.go:217 +0x14dd fp=0xc2081b7938 sp=0xc2081b7680
gopkg.in/mgo.v2/bson.Unmarshal(0xc208164000, 0x6cb3, 0x6cb3, 0x2931c0, 0xc208102260, 0x0, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/bson/bson.go:523 +0x27a fp=0xc2081b79f8 sp=0xc2081b7938
gopkg.in/mgo%2ev2.(*Iter).Next(0xc208154000, 0x2931c0, 0xc208102260, 0x10)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/session.go:3465 +0x58c fp=0xc2081b7b60 sp=0xc2081b79f8
github.com/mongodb/mongo-tools/mongoexport.(*MongoExport).exportInternal(0xc2081500b0, 0x518ba0, 0xc20803e088, 0x0, 0x0, 0x0)
/data/mci/src/src/mongo-tools-repo/.gopath/src/github.com/mongodb/mongo-tools/mongoexport/mongoexport.go:321 +0x873 fp=0xc2081b7cf0 sp=0xc2081b7b60
github.com/mongodb/mongo-tools/mongoexport.(*MongoExport).Export(0xc2081500b0, 0x518ba0, 0xc20803e088, 0x518ba0, 0x0, 0x0)
/data/mci/src/src/mongo-tools-repo/.gopath/src/github.com/mongodb/mongo-tools/mongoexport/mongoexport.go:349 +0x4e fp=0xc2081b7d28 sp=0xc2081b7cf0
main.main()
/data/mci/src/src/mongo-tools-repo/mongoexport/main/mongoexport.go:131 +0xf63 fp=0xc2081b7f98 sp=0xc2081b7d28
runtime.main()
/usr/local/go/src/runtime/proc.go:63 +0xf3 fp=0xc2081b7fe0 sp=0xc2081b7f98
runtime.goexit()
/usr/local/go/src/runtime/asm_amd64.s:2232 +0x1 fp=0xc2081b7fe8 sp=0xc2081b7fe0

goroutine 5 [syscall]:
os/signal.loop()
/usr/local/go/src/os/signal/signal_unix.go:21 +0x1f
created by os/signal.init- 1
/usr/local/go/src/os/signal/signal_unix.go:27 +0x35

goroutine 6 [chan receive]:
github.com/mongodb/mongo-tools/common/signals.Handle()
/data/mci/src/src/mongo-tools-repo/.gopath/src/github.com/mongodb/mongo-tools/common/signals/signals_unix.go:16 +0x209
created by main.main
/data/mci/src/src/mongo-tools-repo/mongoexport/main/mongoexport.go:17 +0x34

goroutine 7 [select]:
gopkg.in/mgo%2ev2.(*mongoCluster).syncServersLoop(0xc2080a6000)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/cluster.go:394 +0x606
created by gopkg.in/mgo%2ev2.newCluster
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/cluster.go:78 +0x20b

goroutine 8 [sleep]:
gopkg.in/mgo%2ev2.(*mongoServer).pinger(0xc2080a80e0, 0x1)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/server.go:296 +0x169
created by gopkg.in/mgo%2ev2.newServer
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/server.go:89 +0x194

goroutine 33 [sleep]:
gopkg.in/mgo%2ev2.(*mongoServer).pinger(0xc2080d0000, 0x1)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/server.go:296 +0x169
created by gopkg.in/mgo%2ev2.newServer
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/server.go:89 +0x194

goroutine 34 [IO wait]:
net.(*pollDesc).Wait(0xc2080f0060, 0x72, 0x0, 0x0)
/usr/local/go/src/net/fd_poll_runtime.go:84 +0x47
net.(*pollDesc).WaitRead(0xc2080f0060, 0x0, 0x0)
/usr/local/go/src/net/fd_poll_runtime.go:89 +0x43
net.(*netFD).Read(0xc2080f0000, 0xc2080984b0, 0x24, 0x24, 0x0, 0x518af8, 0xc20810a300)
/usr/local/go/src/net/fd_unix.go:242 +0x40f
net.(*conn).Read(0xc2080f4000, 0xc2080984b0, 0x24, 0x24, 0x0, 0x0, 0x0)
/usr/local/go/src/net/net.go:121 +0xdc
gopkg.in/mgo%2ev2.fill(0x51bd60, 0xc2080f4000, 0xc2080984b0, 0x24, 0x24, 0x0, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/socket.go:530 +0x75
gopkg.in/mgo%2ev2.(*mongoSocket).readLoop(0xc2080d00e0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/socket.go:547 +0x126
created by gopkg.in/mgo%2ev2.newSocket
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/socket.go:194 +0x3d3

goroutine 65 [IO wait]:
net.(*pollDesc).Wait(0xc2080108b0, 0x72, 0x0, 0x0)
/usr/local/go/src/net/fd_poll_runtime.go:84 +0x47
net.(*pollDesc).WaitRead(0xc2080108b0, 0x0, 0x0)
/usr/local/go/src/net/fd_poll_runtime.go:89 +0x43
net.(*netFD).Read(0xc208010850, 0xc20820369e, 0x4512, 0x4512, 0x0, 0x518af8, 0xc20810a020)
/usr/local/go/src/net/fd_unix.go:242 +0x40f
net.(*conn).Read(0xc208106000, 0xc20820369e, 0x4512, 0x4512, 0x0, 0x0, 0x0)
/usr/local/go/src/net/net.go:121 +0xdc
gopkg.in/mgo%2ev2.fill(0x51bd60, 0xc208106000, 0xc208202004, 0x5bac, 0x5bac, 0x0, 0x0)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/socket.go:533 +0x11c
gopkg.in/mgo%2ev2.(*mongoSocket).readLoop(0xc20810c000)
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/socket.go:606 +0xd56
created by gopkg.in/mgo%2ev2.newSocket
/data/mci/src/src/mongo-tools-repo/vendor/src/gopkg.in/mgo.v2/socket.go:194 +0x3d3

goroutine 12 [select]:
github.com/mongodb/mongo-tools/common/progress.(*Manager).start(0xc20809c4c0)
/data/mci/src/src/mongo-tools-repo/.gopath/src/github.com/mongodb/mongo-tools/common/progress/manager.go:126 +0x140
created by github.com/mongodb/mongo-tools/common/progress.(*Manager).Start
/data/mci/src/src/mongo-tools-repo/.gopath/src/github.com/mongodb/mongo-tools/common/progress/manager.go:115 +0xc7