// For simplicity, don't unwind leaf entries, which are not used in this test.
			break;
		} else {
			RtlVirtualUnwind(0, ImageBase, ControlPc, FunctionEntry, &context, &HandlerData, &EstablisherFrame, NULL);
		}

		ControlPc = context.Rip;
		// Check if we left the user range.
		if (ControlPc < 0x10000) {
			break;
		}

		BackTrace[i] = (PVOID)(ControlPc);
	}
	return i;
#else
	return 0;
#endif

	for len(s) > 0 {
		if !as.contains(s[len(s)-1]) {
			break
		}
		s = s[:len(s)-1]
	}
	return s
}

func trimRightUnicode(s []byte, cutset string) []byte {
	for len(s) > 0 {
		r, n := rune(s[len(s)-1]), 1
		if r >= utf8.RuneSelf {
			r, n = utf8.DecodeLastRune(s)
		}
		if !containsRune(cutset, r) {
			break
		}
		s = s[:len(s)-n]
	}
	return s
}

		}
	}
	if err := tw.Close(); err != nil {
		log.Fatal(err)
	}

	// Open and iterate through the files in the archive.
	tr := tar.NewReader(&buf)
	for {
		hdr, err := tr.Next()
		if err == io.EOF {
			break // End of archive
		}
		if err != nil {
			log.Fatal(err)
		}
		fmt.Printf("Contents of %s:\n", hdr.Name)
		if _, err := io.Copy(os.Stdout, tr); err != nil {
			log.Fatal(err)
		}
		fmt.Println()
	}

		acceptArg := true
		args = []string{} // Zero length but not nil.
	Loop:
		for {
			tok = in.Stack.Next()
			switch tok {
			case ')':
				tok = in.Stack.Next() // First token of macro definition.
				break Loop
			case ',':
				if acceptArg {
					in.Error("bad syntax in definition for macro:", name)
				}
				acceptArg = true
			case scanner.Ident:
				if !acceptArg {

}

func (p *Parser) Parse() (*obj.Prog, bool) {
	scratch := make([][]lex.Token, 0, 3)
	for {
		word, cond, operands, ok := p.line(scratch)
		if !ok {
			break
		}
		scratch = operands

		if p.pseudo(word, operands) {
			continue
		}
		i, present := p.arch.Instructions[word]
		if present {
			p.instruction(i, word, cond, operands)
			continue
		}

	}
	return
}
</pre>

<h3 id="Break_statements">Break statements</h3>

<p>
A "break" statement terminates execution of the innermost
<a href="#For_statements">"for"</a>,
<a href="#Switch_statements">"switch"</a>, or
<a href="#Select_statements">"select"</a> statement
within the same function.
</p>

<pre class="ebnf">
BreakStmt = "break" [ Label ] .
</pre>

<p>

			if n < 0 || len(s.buf)-s.end < n {
				s.setErr(ErrBadReadCount)
				break
			}
			s.end += n
			if err != nil {
				s.setErr(err)
				break
			}
			if n > 0 {
				s.empties = 0
				break
			}
			loop++
			if loop > maxConsecutiveEmptyReads {
				s.setErr(io.ErrNoProgress)
				break
			}
		}
	}
}

			pList := new(obj.Plist)
			pList.Firstpc, ok = parser.Parse()
			// reports errors to parser.Errorf
			if ok {
				obj.Flushplist(ctxt, pList, nil)
			}
		}
		if !ok {
			failedFile = f
			break
		}
	}
	if ok && !*flags.SymABIs {
		ctxt.NumberSyms()
		obj.WriteObjFile(ctxt, buf)
	}
	if !ok || diag {
		if failedFile != "" {
			log.Printf("assembly of %s failed", failedFile)
		} else {

pkg syscall (windows-386), const CRYPT_SILENT = 64
pkg syscall (windows-386), const CRYPT_VERIFYCONTEXT = 4026531840
pkg syscall (windows-386), const CTRL_BREAK_EVENT = 1
pkg syscall (windows-386), const CTRL_BREAK_EVENT ideal-int
pkg syscall (windows-386), const CTRL_C_EVENT = 0
pkg syscall (windows-386), const CTRL_C_EVENT ideal-int
pkg syscall (windows-386), const DNS_TYPE_A = 1

Go's emphasis on backwards compatibility is one of its key strengths.
There are, however, times when we cannot maintain complete compatibility.
If code depends on buggy (including insecure) behavior,
then fixing the bug will break that code.
New features can also have similar impacts:
enabling the HTTP/2 use by the HTTP client broke programs
connecting to servers with buggy HTTP/2 implementations.
These kinds of changes are unavoidable and