// See golang.org/issue/7856
	r := NewReader([]byte{})
	var wg sync.WaitGroup
	for i := 0; i < 5; i++ {
		wg.Add(2)
		go func() {
			defer wg.Done()
			var buf [1]byte
			r.Read(buf[:])
		}()
		go func() {
			defer wg.Done()
			r.Read(nil)
		}()
	}
	wg.Wait()
}

func TestReaderWriteTo(t *testing.T) {
	for i := 0; i < 30; i += 3 {
		var l int
		if i > 0 {

	fmt.Println("# will be overwritten when running Go programs.")
	for _, mp := range mps {
		fmt.Println()
		f, err := os.CreateTemp("", "go_ios_detect_")
		check(err)
		fname := f.Name()
		defer os.Remove(fname)

		out := output(parseMobileProvision(mp))
		_, err = f.Write(out)
		check(err)
		check(f.Close())

		cert, err := plistExtract(fname, "DeveloperCertificates:0")
		check(err)

		if err != nil {
			return err
		}
		h.Name = name
		if err := tw.WriteHeader(h); err != nil {
			return err
		}
		f, err := fsys.Open(name)
		if err != nil {
			return err
		}
		defer f.Close()
		_, err = io.Copy(tw, f)
		return err
	})
}

// splitUSTARPath splits a path according to USTAR prefix and suffix rules.
// If the path is not splittable, then it will return ("", "", false).

It may be used only as the final non-empty statement in such a clause.
</p>

<pre class="ebnf">
FallthroughStmt = "fallthrough" .
</pre>


<h3 id="Defer_statements">Defer statements</h3>

<p>
A "defer" statement invokes a function whose execution is deferred
to the moment the surrounding function returns, either because the

	case "all", "ret":
		ctxt.Retpoline = true
	}

	ctxt.Bso = bufio.NewWriter(os.Stdout)
	defer ctxt.Bso.Flush()

	architecture.Init(ctxt)

	// Create object file, write header.
	buf, err := bio.Create(*flags.OutputFile)
	if err != nil {
		log.Fatal(err)
	}
	defer buf.Close()

	if !*flags.SymABIs {
		buf.WriteString(objabi.HeaderString())
		fmt.Fprintf(buf, "!\n")
	}

	return
}

// url may contain a #fragment, and the fragment is then noted as needing to exist.
func crawl(url string, sourceURL string) {
	if strings.Contains(url, "/devel/release") {
		return
	}
	mu.Lock()
	defer mu.Unlock()
	if u, frag, ok := strings.Cut(url, "#"); ok {
		url = u
		if frag != "" {
			uf := urlFrag{url, frag}
			neededFrags[uf] = append(neededFrags[uf], sourceURL)
		}
	}
	if crawled[url] {
		return

func TestAddr2Line(t *testing.T) {
	testenv.MustHaveGoBuild(t)

	tmpDir, err := os.MkdirTemp("", "TestAddr2Line")
	if err != nil {
		t.Fatal("TempDir failed: ", err)
	}
	defer os.RemoveAll(tmpDir)

	// Build copy of test binary with debug symbols,
	// since the one running now may not have them.
	exepath := filepath.Join(tmpDir, "testaddr2line_test.exe")

and replaced with those of `initial`. From the repo root:

    > cd doc
    > rm -r next/*
    > cp -r initial/* next

Then edit `next/1-intro.md` to refer to the next version.

To prepare the release notes for a release, run `golang.org/x/build/cmd/relnote generate`.

pkg syscall (openbsd-amd64), const EFAULT = 14
pkg syscall (openbsd-amd64), const EFBIG = 27
pkg syscall (openbsd-amd64), const EFER_LMA = 1024
pkg syscall (openbsd-amd64), const EFER_LME = 256
pkg syscall (openbsd-amd64), const EFER_NXE = 2048
pkg syscall (openbsd-amd64), const EFER_SCE = 1
pkg syscall (openbsd-amd64), const EFTYPE = 79
pkg syscall (openbsd-amd64), const EHOSTDOWN = 64

	p.addr = p.addr[0:0]
	p.isJump = p.arch.IsJump(word)
	for _, op := range operands {
		addr := p.address(op)
		if !p.isJump && addr.Reg < 0 { // Jumps refer to PC, a pseudo.
			p.errorf("illegal use of pseudo-register in %s", word)
		}
		p.addr = append(p.addr, addr)
	}
	if p.isJump {
		p.asmJump(op, cond, p.addr)
		return
	}