// errorcheck

// Copyright 2010 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.

package main

import (
	"io",	// ERROR "unexpected comma"
	"os"

// errorcheck

// Copyright 2009 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.

package main

func f() /* no return type */ {}

func main() {
	x := f();  // ERROR "mismatch|as value|no type"
	_ = x

// 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.

package main

var x int

func main() {
	(x) := 0  // ERROR "non-name [(]x[)]|non-name on left side"

// errorcheck

// Copyright 2018 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.

package p

func f(x interface{}) {
	switch x.(type) {
	}

	switch t := x.(type) { // ERROR "declared and not used"
	}

// errorcheck

// Copyright 2017 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.

// Issue 20233: panic while formatting an error message

package p

// errorcheck

// Copyright 2020 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.

package p

import "unsafe"

type T struct { // ERROR "recursive type"
	x int
	p unsafe.Pointer

	f T

// errorcheck

// Copyright 2010 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.

package main

func main() {
	for x; y; z	// ERROR "expected .*{.* after for clause|undefined"
	{

// errorcheck

// Copyright 2015 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 a label named like a package is recognized
// as a label rather than a package and that the package
// remains unused.

package main

import "math" // ERROR "imported and not used"

func main() {
math:
	for {
		break math
	}

// errorcheck -d=panic

// Copyright 2020 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.

package main

import "bytes"

type _ struct{ bytes.nonexist } // ERROR "unexported|undefined"

type _ interface{ bytes.nonexist } // ERROR "unexported|undefined|expected signature or type name"

func main() {
	var _ bytes.Buffer

// errorcheck

// Copyright 2009 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.

package main

type	T struct
{
	f int;
}

// 6g used to get confused by the f:1 above
// and allow uses of f that would be silently
// dropped during the compilation.
var _ = f;	// ERROR "undefined"