Build fails at tip on darwin/amd64 with net: FAIL

[rjammala]

Please answer these questions before submitting your issue. Thanks!

1. What version of Go are you using (go version)?
   go version devel +f229e46 Mon Apr 4 14:07:47 2016 +0000 darwin/amd64
2. What operating system and processor architecture are you using (go env)?
   GOARCH="amd64"
   GOBIN=""
   GOEXE=""
   GOHOSTARCH="amd64"
   GOHOSTOS="darwin"
   GOOS="darwin"
   GOPATH="/Users/rajanikanth.j/gocode"
   GORACE=""
   GOROOT="/Users/rajanikanth.j/go"
   GOTOOLDIR="/Users/rajanikanth.j/go/pkg/tool/darwin_amd64"
   CC="clang"
   GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/4f/4vg7m4ys42vg8r2q7pxhqdw8jrldwy/T/go-build904284838=/tmp/go-build -gno-record-gcc-switches -fno-common"
   CXX="clang++"
   CGO_ENABLED="1"
3. What did you do?
   If possible, provide a recipe for reproducing the error.
   A complete runnable program is good.
   A link on play.golang.org is best.

Tried to build go at tip.

1. What did you expect to see?
   Build passes.
2. What did you see instead?
   Build fails:
   FAIL
   FAIL net 1.748s

2016/04/04 10:33:55 Failed: exit status 1

@bradfitz

[rjammala]

Seems like a random failure. I cannot reproduce.

[Thomasdezeeuw]

Maybe related issue #14986.