_, err = io.Copy(io.Discard, res.Body)
	if err == nil {
		t.Errorf("Unexpected successful copy")
	}
}

func TestIssue4191_InfiniteGetToPutTimeout(t *testing.T) {
	run(t, testIssue4191_InfiniteGetToPutTimeout, []testMode{http1Mode})
}
func testIssue4191_InfiniteGetToPutTimeout(t *testing.T, mode testMode) {
	const debug = false
	mux := NewServeMux()
	mux.HandleFunc("/get", func(w ResponseWriter, r *Request) {