}
	q := t.connsPerHostWait[w.key]
	q.cleanFrontNotWaiting()
	q.pushBack(w)
	t.connsPerHostWait[w.key] = q
}

// startDialConnFor calls dialConn in a new goroutine.
// t.connsPerHostMu must be held.
func (t *Transport) startDialConnForLocked(w *wantConn) {
	t.dialsInProgress.cleanFrontCanceled()
	t.dialsInProgress.pushBack(w)
	go func() {

	}
	if !reflect.DeepEqual(oe, want) {
		t.Errorf("Got error %#v; want %#v", oe, want)
	}
}

// Issue 36431: calls to RoundTrip should not mutate t.ProxyConnectHeader.
//
// (A bug caused dialConn to instead write the per-request Proxy-Authorization
// header through to the shared Header instance, introducing a data race.)
func TestTransportProxyDialDoesNotMutateProxyConnectHeader(t *testing.T) {

				// other test to see an unexpected extra connection.
				defer func() {
					cancel()
					<-dialDone
				}()

				go func() {
					defer close(dialDone)
					d := Dialer{}
					c, err := d.DialContext(ctx, ln.Addr().Network(), ln.Addr().String())
					if err != nil {
						// If the timing didn't work out, it is possible for this Dial