b.Write([]byte{'4'}) // ERROR "\[\]byte{...} does not escape$"
	return b.String()    // ERROR "inlining call to bytes.\(\*Buffer\).String$" "string\(bytes.b.buf\[bytes.b.off:\]\) escapes to heap$"
}

func bufferNoEscape2(xs []string) int { // 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$" "inlining call to bytes.NewBuffer$"