You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: label.go
    path of file: ./repos/gccrs/gcc/testsuite/go.test/test
    
    the code of the file until where you have to start completion: // errorcheck

// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Verify that erroneous labels are caught by the compiler.
// This set is caught by pass 1.
// Does not compile.

package main

var x int

func f() {
L1: // ERROR "labe
    
func f() {
L1: // ERROR "label .*L1.* defined and not used"
	for {
	}
L2: // ERROR "label .*L2.* defined and not used"
	select {}
L3: // ERROR "label .*L3.* defined and not used"
	switch {
	}
L4: // ERROR "label .*L4.* defined and not used"
	if true {
	}
L5: // ERROR "label .*L5.* defined and not used"
	f()
L6: // GCCGO_ERROR "previous"
	f()
L6: // ERROR "label .*L6.* already defined"
	f()
	if x == 20 {
		goto L6
	}

L7:
	for {
		break L7
	}

L8:
	for {
		if x == 21 {
			continue L8
		}
	}

L9:
	switch {
	case true:
		break L9
	defalt: // ERROR "label .*defalt.* defined and not used"
	}

L10:
	select {
	default:
		break L10
	}

	goto L10

	goto go2 // ERROR "label go2 not defined|reference to undefined label .*go2"
}