net/http: TestTransportEventTraceRealDNS fails on OS X 10.11.6

[aybabtme]

1. What version of Go are you using (go version)?

go version go1.7 darwin/amd64

1. What operating system and processor architecture are you using (go env)?

$ go env
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/antoine/gocode"
GORACE=""
GOROOT="/Users/antoine/go"
GOTOOLDIR="/Users/antoine/go/pkg/tool/darwin_amd64"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/gy/yc35jkns511gp7t1w9mnn6q00000gn/T/go-build579204479=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"

1. What did you do?

$ cd ~/go
$ git pull origin master
Already up-to-date.
$ git status
On branch master
Your branch is up-to-date with 'origin/master'.
nothing to commit, working directory clean
$ git checkout go1.7
...
HEAD is now at 0d81858... go1.7
$ cd src
$ ./all.bash
...
--- FAIL: TestTransportEventTraceRealDNS (0.06s)
        transport_test.go:3386: expected error during DNS lookup
FAIL
FAIL    net/http        10.854s

1. What did you expect to see?

TestTransportEventTraceRealDNS should pass on a clean checkout of go1.7

1. What did you see instead?

TestTransportEventTraceRealDNS fails.

[bradfitz]

This is basically a dup of #16716.

The Go test suite assumes you have working DNS. You appear to be using a DNS server which lies to you.

I suppose we could make that test only run in full mode and on builders.

[gopherbot]

CL https://golang.org/cl/28782 mentions this issue.