for _, x := range xs {
		b.WriteString(x)
	}
	return b.Len() // ERROR "inlining call to bytes.\(\*Buffer\).Len$"
}

func bufferNoEscape3(xs []string) string { // ERROR "xs does not escape$"
	b := bytes.NewBuffer(make([]byte, 0, 64)) // ERROR "&bytes.Buffer{...} does not escape$" "make\(\[\]byte, 0, 64\) does not escape$" "inlining call to bytes.NewBuffer$"