runtime: bad pointer in frame github.com/vjeantet/ldapserver.(*client).serve.func2

[tamalsaha]

Thanks for this library. We are using this as a ldap server in our e2e tests. One of things we are seeing in a stack trace like below. The confusing part is that this does not always happen.

https://travis-ci.org/appscode/guard/jobs/395239319#L925

runtime: bad pointer in frame github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*client).serve.func2 at 0xc000077f10: 0x2
fatal error: invalid pointer found on stack
2018/06/21 22:19:16 >>> 6 - ExtendedResponse - hex=303a02010078350a0135040004177365727665722069732061626f757420746f2073746f708a15312e332e362e312e342e312e313436362e32303033
runtime stack:
runtime.throw(0x10eb4a7, 0x1e)
	/home/travis/.gimme/versions/go/src/runtime/panic.go:589 +0x6a fp=0x7f45d9c54760 sp=0x7f45d9c54730 pc=0x455a5a
runtime.adjustpointers(0xc000077e68, 0x7f45d9c54818, 0x7f45d9c54bd8, 0x18aa448, 0x18d00e0)
	/home/travis/.gimme/versions/go/src/runtime/stack.go:587 +0x221 fp=0x7f45d9c547c0 sp=0x7f45d9c54760 pc=0x46eda1
runtime.adjustframe(0x7f45d9c54ae8, 0x7f45d9c54bd8, 0x18d00e0)
	/home/travis/.gimme/versions/go/src/runtime/stack.go:629 +0x188 fp=0x7f45d9c54848 sp=0x7f45d9c547c0 pc=0x46ef38
runtime.gentraceback(0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0xc00036e000, 0x0, 0x0, 0x7fffffff, 0x11334e0, 0x7f45d9c54bd8, 0x0, ...)
	/home/travis/.gimme/versions/go/src/runtime/traceback.go:325 +0x131e fp=0x7f45d9c54b50 sp=0x7f45d9c54848 pc=0x47b4de
runtime.copystack(0xc00036e000, 0x1000, 0x7f45d9c54d01)
	/home/travis/.gimme/versions/go/src/runtime/stack.go:841 +0x26e fp=0x7f45d9c54d08 sp=0x7f45d9c54b50 pc=0x46f5ee
runtime.newstack()
	/home/travis/.gimme/versions/go/src/runtime/stack.go:1013 +0x312 fp=0x7f45d9c54ea0 sp=0x7f45d9c54d08 pc=0x46fa02
runtime.morestack()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:429 +0x8f fp=0x7f45d9c54ea8 sp=0x7f45d9c54ea0 pc=0x48456f
goroutine 129 [copystack]:
time.now(0x4b36a4, 0x0, 0x0)
	/home/travis/.gimme/versions/go/src/runtime/timestub.go:15 +0x69 fp=0xc000077b38 sp=0xc000077b30 pc=0x476459
time.Now(0x4c29e2, 0x0, 0x0)
	/home/travis/.gimme/versions/go/src/time/time.go:1055 +0x34 fp=0xc000077b88 sp=0xc000077b38 pc=0x4b3d84
time.Until(0xbec326f92ffb7fd4, 0x163d5b572, 0x1917980, 0x4274a0)
	/home/travis/.gimme/versions/go/src/time/time.go:917 +0x34 fp=0xc000077bd8 sp=0xc000077b88 pc=0x4b36a4
internal/poll.setDeadlineImpl(0xc000432800, 0xbec326f92ffb7fd4, 0x163d5b572, 0x1917980, 0x72, 0x0, 0x0)
	/home/travis/.gimme/versions/go/src/internal/poll/fd_poll_runtime.go:137 +0x62 fp=0xc000077c48 sp=0xc000077bd8 pc=0x4c29e2
internal/poll.(*FD).SetReadDeadline(0xc000432800, 0xbec326f92ffb7fd4, 0x163d5b572, 0x1917980, 0xc0003524f8, 0x42e3f5)
	/home/travis/.gimme/versions/go/src/internal/poll/fd_poll_runtime.go:128 +0x64 fp=0xc000077ca0 sp=0xc000077c48 pc=0x4c2884
net.(*netFD).SetReadDeadline(0xc000432800, 0xbec326f92ffb7fd4, 0x163d5b572, 0x1917980, 0x411900, 0x0)
	/home/travis/.gimme/versions/go/src/net/fd_unix.go:308 +0x5d fp=0xc000077cf0 sp=0xc000077ca0 pc=0x668ced
net.(*conn).SetReadDeadline(0xc00000e068, 0xbec326f92ffb7fd4, 0x163d5b572, 0x1917980, 0xc000352610, 0x2fec3d94)
	/home/travis/.gimme/versions/go/src/net/net.go:243 +0x90 fp=0xc000077d70 sp=0xc000077cf0 pc=0x6841a0
net.(*TCPConn).SetReadDeadline(0xc00000e068, 0xbec326f92ffb7fd4, 0x163d5b572, 0x1917980, 0xc000352600, 0x163d5b572)
	<autogenerated>:1 +0x66 fp=0xc000077dc0 sp=0xc000077d70 pc=0x6a65d6
crypto/tls.(*Conn).SetReadDeadline(0xc000097880, 0xbec326f92ffb7fd4, 0x163d5b572, 0x1917980, 0xbec326f92ffb7fd4, 0x163d5b572)
	/home/travis/.gimme/versions/go/src/crypto/tls/conn.go:131 +0x73 fp=0xc000077e10 sp=0xc000077dc0 pc=0x7c8be3
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*client).serve.func2(0xc000432880)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/client.go:97 +0x426 fp=0xc000077fd8 sp=0xc000077e10 pc=0xf3e646
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc000077fe0 sp=0xc000077fd8 pc=0x486501
created by github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*client).serve
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/client.go:84 +0x22d
goroutine 1 [runnable]:
runtime.gopark(0x1133808, 0xc000396538, 0x170d, 0x3)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:302 +0xeb fp=0xc0000cf9a0 sp=0xc0000cf980 pc=0x4577bb
runtime.goparkunlock(0xc000396538, 0x170d, 0x3)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:308 +0x53 fp=0xc0000cf9d0 sp=0xc0000cf9a0 pc=0x457863
runtime.chanrecv(0xc0003964e0, 0xc00010bae7, 0xc000000301, 0x573d61)
	/home/travis/.gimme/versions/go/src/runtime/chan.go:520 +0x20b fp=0xc0000cfa60 sp=0xc0000cf9d0 pc=0x42ea5b
runtime.chanrecv1(0xc0003964e0, 0xc00010bae7)
	/home/travis/.gimme/versions/go/src/runtime/chan.go:402 +0x2b fp=0xc0000cfa90 sp=0xc0000cfa60 pc=0x42e7fb
testing.(*T).Run(0xc0000e8200, 0x10e1eea, 0x13, 0x11324f8, 0xc00010bb01)
	/home/travis/.gimme/versions/go/src/testing/testing.go:879 +0x689 fp=0xc0000cfb98 sp=0xc0000cfa90 pc=0x573d99
testing.runTests.func1(0xc0000e8200)
	/home/travis/.gimme/versions/go/src/testing/testing.go:1119 +0xa9 fp=0xc0000cfbf0 sp=0xc0000cfb98 pc=0x5799d9
testing.tRunner(0xc0000e8200, 0xc00010bd20)
	/home/travis/.gimme/versions/go/src/testing/testing.go:827 +0x163 fp=0xc0000cfc48 sp=0xc0000cfbf0 pc=0x573693
testing.runTests(0xc0001d14c0, 0x190eaa0, 0x4, 0x4, 0x500)
	/home/travis/.gimme/versions/go/src/testing/testing.go:1117 +0x4e7 fp=0xc0000cfd50 sp=0xc0000cfc48 pc=0x575b37
testing.(*M).Run(0xc0001f0580, 0x0)
	/home/travis/.gimme/versions/go/src/testing/testing.go:1034 +0x2ef fp=0xc0000cfea8 sp=0xc0000cfd50 pc=0x5744bf
main.main()
	_testmain.go:104 +0x333 fp=0xc0000cff98 sp=0xc0000cfea8 pc=0xf51a13
runtime.main()
	/home/travis/.gimme/versions/go/src/runtime/proc.go:201 +0x207 fp=0xc0000cffe0 sp=0xc0000cff98 pc=0x4573a7
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc0000cffe8 sp=0xc0000cffe0 pc=0x486501
goroutine 2 [force gc (idle)]:
runtime.gopark(0x1133808, 0x1916fa0, 0x1410, 0x1)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:302 +0xeb fp=0xc000062f80 sp=0xc000062f60 pc=0x4577bb
runtime.goparkunlock(0x1916fa0, 0x1410, 0x1)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:308 +0x53 fp=0xc000062fb0 sp=0xc000062f80 pc=0x457863
runtime.forcegchelper()
	/home/travis/.gimme/versions/go/src/runtime/proc.go:251 +0xb3 fp=0xc000062fe0 sp=0xc000062fb0 pc=0x457633
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc000062fe8 sp=0xc000062fe0 pc=0x486501
created by runtime.init.4
	/home/travis/.gimme/versions/go/src/runtime/proc.go:240 +0x35
goroutine 3 [GC sweep wait]:
runtime.gopark(0x1133808, 0x1917180, 0x48140c, 0x1)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:302 +0xeb fp=0xc000063780 sp=0xc000063760 pc=0x4577bb
runtime.goparkunlock(0x1917180, 0x120140c, 0x1)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:308 +0x53 fp=0xc0000637b0 sp=0xc000063780 pc=0x457863
runtime.bgsweep(0xc00004c0e0)
	/home/travis/.gimme/versions/go/src/runtime/mgcsweep.go:71 +0x102 fp=0xc0000637d8 sp=0xc0000637b0 pc=0x4496b2
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc0000637e0 sp=0xc0000637d8 pc=0x486501
created by runtime.gcenable
	/home/travis/.gimme/versions/go/src/runtime/mgc.go:216 +0x58
goroutine 18 [finalizer wait]:
runtime.gopark(0x1133808, 0x1935d68, 0x20000140f, 0x1)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:302 +0xeb fp=0xc000062728 sp=0xc000062708 pc=0x4577bb
runtime.goparkunlock(0x1935d68, 0xc00006140f, 0x1)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:308 +0x53 fp=0xc000062758 sp=0xc000062728 pc=0x457863
runtime.runfinq()
	/home/travis/.gimme/versions/go/src/runtime/mfinal.go:175 +0x99 fp=0xc0000627e0 sp=0xc000062758 pc=0x441099
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc0000627e8 sp=0xc0000627e0 pc=0x486501
created by runtime.createfing
	/home/travis/.gimme/versions/go/src/runtime/mfinal.go:156 +0x61
goroutine 19 [chan receive]:
runtime.gopark(0x1133808, 0xc0000c00b8, 0x170d, 0x3)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:302 +0xeb fp=0xc00005e698 sp=0xc00005e678 pc=0x4577bb
runtime.goparkunlock(0xc0000c00b8, 0x170d, 0x3)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:308 +0x53 fp=0xc00005e6c8 sp=0xc00005e698 pc=0x457863
runtime.chanrecv(0xc0000c0060, 0xc00005e7b0, 0x1, 0xc0000b8168)
	/home/travis/.gimme/versions/go/src/runtime/chan.go:520 +0x20b fp=0xc00005e758 sp=0xc00005e6c8 pc=0x42ea5b
runtime.chanrecv2(0xc0000c0060, 0xc00005e7b0, 0x0)
	/home/travis/.gimme/versions/go/src/runtime/chan.go:407 +0x2b fp=0xc00005e788 sp=0xc00005e758 pc=0x42e83b
github.com/appscode/guard/vendor/github.com/golang/glog.(*loggingT).flushDaemon(0x1917d00)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/golang/glog/glog.go:879 +0xae fp=0xc00005e7d8 sp=0xc00005e788 pc=0x708c2e
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00005e7e0 sp=0xc00005e7d8 pc=0x486501
created by github.com/appscode/guard/vendor/github.com/golang/glog.init.0
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/golang/glog/glog.go:410 +0x231
goroutine 20 [syscall]:
runtime.notetsleepg(0x191c5c0, 0x599a605e1, 0x0)
	/home/travis/.gimme/versions/go/src/runtime/lock_futex.go:227 +0x37 fp=0xc00005ef58 sp=0xc00005ef28 pc=0x433fa7
runtime.timerproc(0x191c5a0)
	/home/travis/.gimme/versions/go/src/runtime/time.go:288 +0x31c fp=0xc00005efd8 sp=0xc00005ef58 pc=0x475eac
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00005efe0 sp=0xc00005efd8 pc=0x486501
created by runtime.(*timersBucket).addtimerLocked
	/home/travis/.gimme/versions/go/src/runtime/time.go:170 +0x114
goroutine 69 [GC worker (idle)]:
runtime.gopark(0x1133620, 0xc000374770, 0xc0002a1417, 0x0)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:302 +0xeb fp=0xc00005f760 sp=0xc00005f740 pc=0x4577bb
runtime.gcBgMarkWorker(0xc000052500)
	/home/travis/.gimme/versions/go/src/runtime/mgc.go:1772 +0xfc fp=0xc00005f7d8 sp=0xc00005f760 pc=0x44492c
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00005f7e0 sp=0xc00005f7d8 pc=0x486501
created by runtime.gcBgMarkStartWorkers
	/home/travis/.gimme/versions/go/src/runtime/mgc.go:1720 +0x77
goroutine 23 [IO wait]:
runtime.gopark(0x11337d8, 0x7f45dd508790, 0x1b02, 0x5)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:302 +0xeb fp=0xc000071aa0 sp=0xc000071a80 pc=0x4577bb
runtime.netpollblock(0x7f45dd508768, 0x72, 0x0)
	/home/travis/.gimme/versions/go/src/runtime/netpoll.go:366 +0x99 fp=0xc000071ad8 sp=0xc000071aa0 pc=0x452b29
internal/poll.runtime_pollWait(0x7f45dd508768, 0x72, 0xc000071b88)
	/home/travis/.gimme/versions/go/src/runtime/netpoll.go:173 +0x66 fp=0xc000071b08 sp=0xc000071ad8 pc=0x4521d6
internal/poll.(*pollDesc).wait(0xc0001f0698, 0x72, 0x0, 0x0, 0x12087a0)
	/home/travis/.gimme/versions/go/src/internal/poll/fd_poll_runtime.go:85 +0xe4 fp=0xc000071b50 sp=0xc000071b08 pc=0x4c2524
internal/poll.(*pollDesc).waitRead(0xc0001f0698, 0xffffffffffffff00, 0x0, 0x0)
	/home/travis/.gimme/versions/go/src/internal/poll/fd_poll_runtime.go:90 +0x4b fp=0xc000071b98 sp=0xc000071b50 pc=0x4c269b
internal/poll.(*FD).Accept(0xc0001f0680, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go/src/internal/poll/fd_unix.go:378 +0x27f fp=0xc000071c18 sp=0xc000071b98 pc=0x4c573f
net.(*netFD).accept(0xc0001f0680, 0x0, 0xc000071cf8, 0x464f55)
	/home/travis/.gimme/versions/go/src/net/fd_unix.go:239 +0x53 fp=0xc000071d08 sp=0xc000071c18 pc=0x668133
net.(*TCPListener).accept(0xc0000b6338, 0x48d785, 0x490f78, 0xc000071db8)
	/home/travis/.gimme/versions/go/src/net/tcpsock_posix.go:139 +0x50 fp=0xc000071d50 sp=0xc000071d08 pc=0x692440
net.(*TCPListener).Accept(0xc0000b6338, 0xc0000947e0, 0xc000168b00, 0xc0003630e0, 0x2)
	/home/travis/.gimme/versions/go/src/net/tcpsock.go:260 +0x50 fp=0xc000071dc8 sp=0xc000071d50 pc=0x6903c0
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*Server).serve(0xc0000b8af0, 0x0, 0x0)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/server.go:85 +0x130 fp=0xc000071ea8 sp=0xc000071dc8 pc=0xf3d1f0
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*Server).ListenAndServe(0xc0000b8af0, 0x10de0bb, 0xe, 0x0, 0x0, 0x0, 0x0, 0x0)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/server.go:63 +0x25b fp=0xc000071f38 sp=0xc000071ea8 pc=0xf3d01b
github.com/appscode/guard/auth/providers/ldap.(*ldapServer).start.func1(0xc0001d1520)
	/home/travis/gopath/src/github.com/appscode/guard/auth/providers/ldap/ldap_test.go:48 +0x1f0 fp=0xc000071fd8 sp=0xc000071f38 pc=0xf4ef00
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc000071fe0 sp=0xc000071fd8 pc=0x486501
created by github.com/appscode/guard/auth/providers/ldap.(*ldapServer).start
	/home/travis/gopath/src/github.com/appscode/guard/auth/providers/ldap/ldap_test.go:38 +0x51
goroutine 89 [GC worker (idle)]:
runtime.gopark(0x1133620, 0xc00039c770, 0x571417, 0x0)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:302 +0xeb fp=0xc00034ef60 sp=0xc00034ef40 pc=0x4577bb
runtime.gcBgMarkWorker(0xc000050000)
	/home/travis/.gimme/versions/go/src/runtime/mgc.go:1772 +0xfc fp=0xc00034efd8 sp=0xc00034ef60 pc=0x44492c
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00034efe0 sp=0xc00034efd8 pc=0x486501
created by runtime.gcBgMarkStartWorkers
	/home/travis/.gimme/versions/go/src/runtime/mgc.go:1720 +0x77
goroutine 6 [timer goroutine (idle)]:
runtime.gopark(0x1133808, 0x191c520, 0x1414, 0x1)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:302 +0xeb fp=0xc000063f28 sp=0xc000063f08 pc=0x4577bb
runtime.goparkunlock(0x191c520, 0xdf8431414, 0x1)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:308 +0x53 fp=0xc000063f58 sp=0xc000063f28 pc=0x457863
runtime.timerproc(0x191c520)
	/home/travis/.gimme/versions/go/src/runtime/time.go:280 +0x296 fp=0xc000063fd8 sp=0xc000063f58 pc=0x475e26
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc000063fe0 sp=0xc000063fd8 pc=0x486501
created by runtime.(*timersBucket).addtimerLocked
	/home/travis/.gimme/versions/go/src/runtime/time.go:170 +0x114
goroutine 91 [IO wait]:
runtime.gopark(0x11337d8, 0x7f45dd508520, 0x1b02, 0x5)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:302 +0xeb fp=0xc00035da30 sp=0xc00035da10 pc=0x4577bb
runtime.netpollblock(0x7f45dd5084f8, 0x72, 0x0)
	/home/travis/.gimme/versions/go/src/runtime/netpoll.go:366 +0x99 fp=0xc00035da68 sp=0xc00035da30 pc=0x452b29
internal/poll.runtime_pollWait(0x7f45dd5084f8, 0x72, 0xc00035db18)
	/home/travis/.gimme/versions/go/src/runtime/netpoll.go:173 +0x66 fp=0xc00035da98 sp=0xc00035da68 pc=0x4521d6
internal/poll.(*pollDesc).wait(0xc0001f0018, 0x72, 0x0, 0x0, 0x12087a0)
	/home/travis/.gimme/versions/go/src/internal/poll/fd_poll_runtime.go:85 +0xe4 fp=0xc00035dae0 sp=0xc00035da98 pc=0x4c2524
internal/poll.(*pollDesc).waitRead(0xc0001f0018, 0xffffffffffffff00, 0x0, 0x0)
	/home/travis/.gimme/versions/go/src/internal/poll/fd_poll_runtime.go:90 +0x4b fp=0xc00035db28 sp=0xc00035dae0 pc=0x4c269b
internal/poll.(*FD).Accept(0xc0001f0000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go/src/internal/poll/fd_unix.go:378 +0x27f fp=0xc00035dba8 sp=0xc00035db28 pc=0x4c573f
net.(*netFD).accept(0xc0001f0000, 0xffffffff, 0x0, 0xc00035dcc8)
	/home/travis/.gimme/versions/go/src/net/fd_unix.go:239 +0x53 fp=0xc00035dc98 sp=0xc00035dba8 pc=0x668133
net.(*TCPListener).accept(0xc0000b6018, 0x48, 0x0, 0xc000050058)
	/home/travis/.gimme/versions/go/src/net/tcpsock_posix.go:139 +0x50 fp=0xc00035dce0 sp=0xc00035dc98 pc=0x692440
net.(*TCPListener).Accept(0xc0000b6018, 0x490f78, 0xc00035ddb8, 0x490f82, 0x45f05e)
	/home/travis/.gimme/versions/go/src/net/tcpsock.go:260 +0x50 fp=0xc00035dd58 sp=0xc00035dce0 pc=0x6903c0
crypto/tls.(*listener).Accept(0xc0003456e0, 0xc000396540, 0xc000432800, 0xc0003c7c40, 0x2)
	/home/travis/.gimme/versions/go/src/crypto/tls/tls.go:52 +0x55 fp=0xc00035ddc8 sp=0xc00035dd58 pc=0x7fd7f5
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*Server).serve(0xc0000eef50, 0x0, 0x0)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/server.go:85 +0x130 fp=0xc00035dea8 sp=0xc00035ddc8 pc=0xf3d1f0
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*Server).ListenAndServe(0xc0000eef50, 0x10de0c9, 0xe, 0xc00035df88, 0x1, 0x1, 0x42e83b, 0xc000047da0)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/server.go:63 +0x25b fp=0xc00035df38 sp=0xc00035dea8 pc=0xf3d01b
github.com/appscode/guard/auth/providers/ldap.(*ldapServer).start.func1(0xc0003a45a0)
	/home/travis/gopath/src/github.com/appscode/guard/auth/providers/ldap/ldap_test.go:43 +0x1a0 fp=0xc00035dfd8 sp=0xc00035df38 pc=0xf4eeb0
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00035dfe0 sp=0xc00035dfd8 pc=0x486501
created by github.com/appscode/guard/auth/providers/ldap.(*ldapServer).start
	/home/travis/gopath/src/github.com/appscode/guard/auth/providers/ldap/ldap_test.go:38 +0x51
goroutine 128 [runnable]:
syscall.Syscall(0x1, 0x1, 0xc0000ec400, 0xac, 0xac, 0xac, 0x0)
	/home/travis/.gimme/versions/go/src/syscall/asm_linux_amd64.s:18 +0x5 fp=0xc000437b88 sp=0xc000437b80 pc=0x4a3465
syscall.write(0x1, 0xc0000ec400, 0xac, 0x200, 0x77, 0x454601, 0x0)
	/home/travis/.gimme/versions/go/src/syscall/zsyscall_linux_amd64.go:1005 +0x68 fp=0xc000437bf0 sp=0xc000437b88 pc=0x4a0568
syscall.Write(0x1, 0xc0000ec400, 0xac, 0x200, 0xc000437d08, 0x6fe387, 0xc0000b8ad0)
	/home/travis/.gimme/versions/go/src/syscall/syscall_unix.go:191 +0x6b fp=0xc000437c50 sp=0xc000437bf0 pc=0x49d50b
internal/poll.(*FD).Write(0xc0000b8050, 0xc0000ec400, 0xac, 0x200, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go/src/internal/poll/fd_unix.go:262 +0x1d0 fp=0xc000437cd8 sp=0xc000437c50 pc=0x4c47e0
os.(*File).write(0xc0000b6008, 0xc0000ec400, 0xac, 0x200, 0xc0000b8aa0, 0x487e52, 0x4658e1)
	/home/travis/.gimme/versions/go/src/os/file_unix.go:265 +0x70 fp=0xc000437d38 sp=0xc000437cd8 pc=0x4d23e0
os.(*File).Write(0xc0000b6008, 0xc0000ec400, 0xac, 0x200, 0x97, 0x97, 0x0)
	/home/travis/.gimme/versions/go/src/os/file.go:145 +0x8e fp=0xc000437de8 sp=0xc000437d38 pc=0x4cda1e
log.(*Logger).Output(0xc0000b8aa0, 0x2, 0xc0003ae820, 0x97, 0x0, 0x0)
	/home/travis/.gimme/versions/go/src/log/log.go:172 +0x3a6 fp=0xc000437ea0 sp=0xc000437de8 pc=0x6ffa16
log.(*Logger).Printf(0xc0000b8aa0, 0x10e29a4, 0x14, 0xc0004d8180, 0x3, 0x3)
	/home/travis/.gimme/versions/go/src/log/log.go:179 +0x90 fp=0xc000437ee8 sp=0xc000437ea0 pc=0x6ffc90
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*client).writeMessage(0xc000432880, 0xc0004f93a0)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/client.go:201 +0x281 fp=0xc000437fa0 sp=0xc000437ee8 pc=0xf380c1
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*client).serve.func1(0xc000432880)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/client.go:78 +0x7d fp=0xc000437fd8 sp=0xc000437fa0 pc=0xf3e1bd
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc000437fe0 sp=0xc000437fd8 pc=0x486501
created by github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*client).serve
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/client.go:76 +0x208
goroutine 90 [semacquire]:
runtime.gopark(0x1133808, 0x1922920, 0xc0000b1911, 0x4)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:302 +0xeb fp=0xc000355e60 sp=0xc000355e40 pc=0x4577bb
runtime.goparkunlock(0x1922920, 0xc0000e1911, 0x4)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:308 +0x53 fp=0xc000355e90 sp=0xc000355e60 pc=0x457863
runtime.semacquire1(0xc0000eef78, 0x48d800, 0x1)
	/home/travis/.gimme/versions/go/src/runtime/sema.go:144 +0x1bc fp=0xc000355ef8 sp=0xc000355e90 pc=0x4695cc
sync.runtime_Semacquire(0xc0000eef78)
	/home/travis/.gimme/versions/go/src/runtime/sema.go:56 +0x39 fp=0xc000355f20 sp=0xc000355ef8 pc=0x469209
sync.(*WaitGroup).Wait(0xc0000eef70)
	/home/travis/.gimme/versions/go/src/sync/waitgroup.go:130 +0xb5 fp=0xc000355f68 sp=0xc000355f20 pc=0x491175
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*Server).Stop(0xc0000eef50)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/server.go:141 +0xf5 fp=0xc000355fa8 sp=0xc000355f68 pc=0xf3e075
github.com/appscode/guard/auth/providers/ldap.(*ldapServer).start(0xc0003a45a0)
	/home/travis/gopath/src/github.com/appscode/guard/auth/providers/ldap/ldap_test.go:57 +0xc4 fp=0xc000355fd8 sp=0xc000355fa8 pc=0xf48ab4
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc000355fe0 sp=0xc000355fd8 pc=0x486501
created by github.com/appscode/guard/auth/providers/ldap.runTest
	/home/travis/gopath/src/github.com/appscode/guard/auth/providers/ldap/ldap_test.go:273 +0x176
goroutine 134 [IO wait]:
runtime.gopark(0x11337d8, 0x7f45dd5086c0, 0xc000051b02, 0x5)
	/home/travis/.gimme/versions/go/src/runtime/proc.go:302 +0xeb fp=0xc000401320 sp=0xc000401300 pc=0x4577bb
runtime.netpollblock(0x7f45dd508698, 0x72, 0x400)
	/home/travis/.gimme/versions/go/src/runtime/netpoll.go:366 +0x99 fp=0xc000401358 sp=0xc000401320 pc=0x452b29
internal/poll.runtime_pollWait(0x7f45dd508698, 0x72, 0x18c7630)
	/home/travis/.gimme/versions/go/src/runtime/netpoll.go:173 +0x66 fp=0xc000401388 sp=0xc000401358 pc=0x4521d6
internal/poll.(*pollDesc).wait(0xc000432818, 0x72, 0x1208700, 0x18c7630, 0x12087a0)
	/home/travis/.gimme/versions/go/src/internal/poll/fd_poll_runtime.go:85 +0xe4 fp=0xc0004013d0 sp=0xc000401388 pc=0x4c2524
internal/poll.(*pollDesc).waitRead(0xc000432818, 0xc000553400, 0x400, 0x400)
	/home/travis/.gimme/versions/go/src/internal/poll/fd_poll_runtime.go:90 +0x4b fp=0xc000401418 sp=0xc0004013d0 pc=0x4c269b
internal/poll.(*FD).Read(0xc000432800, 0xc000553400, 0x400, 0x400, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go/src/internal/poll/fd_unix.go:163 +0x236 fp=0xc0004014a0 sp=0xc000401418 pc=0x4c38b6
net.(*netFD).Read(0xc000432800, 0xc000553400, 0x400, 0x400, 0xc000401568, 0x4fc1f0, 0xfbac60)
	/home/travis/.gimme/versions/go/src/net/fd_unix.go:203 +0x66 fp=0xc000401518 sp=0xc0004014a0 pc=0x667536
net.(*conn).Read(0xc00000e068, 0xc000553400, 0x400, 0x400, 0x431ac8, 0xc00001e000, 0x101d040)
	/home/travis/.gimme/versions/go/src/net/net.go:176 +0xa1 fp=0xc0004015a8 sp=0xc000401518 pc=0x683161
net.(*TCPConn).Read(0xc00000e068, 0xc000553400, 0x400, 0x400, 0xc000401668, 0x7cb6cf, 0xc000401668)
	<autogenerated>:1 +0x6a fp=0xc000401608 sp=0xc0004015a8 pc=0x6a62fa
crypto/tls.(*block).readFromUntil(0xc00038d5f0, 0x12077c0, 0xc00000e068, 0x5, 0xc00000e068, 0x102b8e0)
	/home/travis/.gimme/versions/go/src/crypto/tls/conn.go:491 +0x107 fp=0xc000401678 sp=0xc000401608 pc=0x7cb377
crypto/tls.(*Conn).readRecord(0xc000097880, 0x1133917, 0xc0000979a8, 0x199)
	/home/travis/.gimme/versions/go/src/crypto/tls/conn.go:592 +0x143 fp=0xc0004019e0 sp=0xc000401678 pc=0x7cbc43
crypto/tls.(*Conn).Read(0xc000097880, 0xc0004c2000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go/src/crypto/tls/conn.go:1144 +0x15f fp=0xc000401a98 sp=0xc0004019e0 pc=0x7d14ff
bufio.(*Reader).Read(0xc00008af00, 0xc000500728, 0x1, 0x1, 0x1, 0x1, 0x0)
	/home/travis/.gimme/versions/go/src/bufio/bufio.go:216 +0x78e fp=0xc000401b78 sp=0xc000401a98 pc=0x57dbfe
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.readBytes(0xc00008af00, 0xc0004f9260, 0x1, 0xc0000b8050, 0xc0000ec400, 0x8)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/packet.go:139 +0xa0 fp=0xc000401c38 sp=0xc000401b78 pc=0xf3a140
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.readTagAndLength(0xc00008af00, 0xc0004f9260, 0x48d69e, 0xc0000b8aa0, 0x487f2c, 0x48fc39, 0xc0000b8aa0, 0xffffffff)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/packet.go:71 +0x67 fp=0xc000401d00 sp=0xc000401c38 pc=0xf39b87
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.readLdapMessageBytes(0xc00008af00, 0x124, 0x200, 0x124)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/packet.go:54 +0x85 fp=0xc000401d68 sp=0xc000401d00 pc=0xf39a65
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.readMessagePacket(0xc00008af00, 0x0, 0xc000401e00, 0x48d785)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/packet.go:18 +0x3d fp=0xc000401dd8 sp=0xc000401d68 pc=0xf395ed
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*client).ReadPacket(0xc000432880, 0x1132c48, 0xc000432880, 0xc0004f8f80)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/client.go:53 +0x61 fp=0xc000401e60 sp=0xc000401dd8 pc=0xf36231
github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*client).serve(0xc000432880)
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/client.go:117 +0x31b fp=0xc000401fd8 sp=0xc000401e60 pc=0xf366eb
runtime.goexit()
	/home/travis/.gimme/versions/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc000401fe0 sp=0xc000401fd8 pc=0x486501
created by github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver.(*Server).serve
	/home/travis/gopath/src/github.com/appscode/guard/vendor/github.com/vjeantet/ldapserver/server.go:110 +0x4db
FAIL	github.com/appscode/guard/auth/providers/ldap	5.985s

Can you please help us solve this issue?