L9:set GOBUILDFAIL=0
L10:
L11:go tool dist env -w -p >env.bat
L12:if errorlevel 1 goto fail
L13:call .\env.bat
L14:del env.bat
L15:echo.
L16:
L17:if exist %GOTOOLDIR%\dist.exe goto distok
L18:echo cannot find %GOTOOLDIR%\dist; nothing to clean
L19:goto fail
L20::distok
L21:
L22:"%GOBIN%\go" clean -i std
L23:"%GOBIN%\go" tool dist clean
L24:"%GOBIN%\go" clean -i cmd
L25:
L26:goto end
L27:
L28::fail
L29:set GOBUILDFAIL=1
L30:
L31::end
L32:if x%GOBUILDEXIT%==x1 exit %GOBUILDFAIL%
...

		cmd.Stdout = buf
		cmd.Stderr = buf
		if err := cmd.Start(); err != nil {
			// We are starting so many processes that on
			// some systems (problem seen on Darwin,
			// Dragonfly, OpenBSD) the fork call will fail
			// with EAGAIN.
			if pe, ok := err.(*os.PathError); ok {
				err = pe.Err
			}
			if se, ok := err.(syscall.Errno); ok && (se == syscall.EAGAIN || se == syscall.EMFILE) {
				time.Sleep(time.Millisecond)

	br.ReadRune()
	br.Peek(1)
	if err := br.UnreadRune(); err == nil {
		t.Error("UnreadRune didn't fail after Peek")
	}
}

func TestNoUnreadByteAfterPeek(t *testing.T) {
	br := NewReader(strings.NewReader("example"))
	br.ReadByte()
	br.Peek(1)
	if err := br.UnreadByte(); err == nil {
		t.Error("UnreadByte didn't fail after Peek")
	}
}

func TestNoUnreadRuneAfterDiscard(t *testing.T) {

			parser.start(lex.Tokenize(test.input))
			addr := obj.Addr{}
			parser.operand(&addr)
		})

		switch {
		case err == nil:
			t.Errorf("fail at %s: got no errors; expected %s\n", test.input, test.error)
		case !strings.Contains(err.Error(), test.error):
			t.Errorf("fail at %s: got %s; expected %s", test.input, err, test.error)
		}
	}
}

func testOperandParser(t *testing.T, parser *Parser, tests []operandTest) {

but guarantees never to return nil. If C's malloc indicates out of memory,
the helper function crashes the program, like when Go itself runs out
of memory. Because C.malloc cannot fail, it has no two-result form
that returns errno.

# C references to Go

Go functions can be exported for use by C code in the following way:

	//export MyFunction

	"fmt"
	"os"
	"os/exec"
	"strings"
)

func main() {
	udids := getLines(exec.Command("idevice_id", "-l"))
	if len(udids) == 0 {
		fail("no udid found; is a device connected?")
	}

	mps := detectMobileProvisionFiles(udids)
	if len(mps) == 0 {
		fail("did not find mobile provision matching device udids %q", udids)
	}

	fmt.Println("# Available provisioning profiles below.")

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Test that it's OK to have C code that does nothing other than
// initialize a global variable.  This used to fail with gccgo.

package gcc68255

/*
#include "c.h"
*/
import "C"

func F() bool {
	return C.v != nil

			t.Errorf("ReadFile(%s) error=%v", path, err2)
			return
		}
	}
	if err != zt.Error {
		t.Errorf("error=%v, want %v", err, zt.Error)
		return
	}

	// bail if file is not zip
	if err == ErrFormat {
		return
	}

	// bail here if no Files expected to be tested
	// (there may actually be files in the zip, but we don't care)
	if zt.File == nil {
		return
	}

	if z.Comment != zt.Comment {

pkg testing, method (*F) Add(...interface{})
pkg testing, method (*F) Cleanup(func())
pkg testing, method (*F) Error(...interface{})
pkg testing, method (*F) Errorf(string, ...interface{})
pkg testing, method (*F) Fail()
pkg testing, method (*F) FailNow()
pkg testing, method (*F) Failed() bool
pkg testing, method (*F) Fatal(...interface{})
pkg testing, method (*F) Fatalf(string, ...interface{})
pkg testing, method (*F) Fuzz(interface{})

func Split(s string, pos int) (string, string) {
	return s[0:pos], s[pos:]
}

func Join(s, t string) string {
	return s + t
}

if Join(Split(value, len(value)/2)) != value {
	log.Panic("test fails")
}
</pre>

<p>
A method call <code>x.m()</code> is valid if the <a href="#Method_sets">method set</a>
of (the type of) <code>x</code> contains <code>m</code> and the