// descriptors and should account for either case when reading
	// ZIP files to ensure compatibility."
	//
	// dataDescriptorLen includes the size of the signature but
	// first read just those 4 bytes to see if it exists.
	if _, err := io.ReadFull(r, buf[:4]); err != nil {
		return err
	}
	off := 0
	maybeSig := readBuf(buf[:4])
	if maybeSig.uint32() != dataDescriptorSignature {
		// No data descriptor signature. Keep these four

			paxHdrs[paxSchilyXattr+k] = v
		}
		whyOnlyPAX = "only PAX supports Xattrs"
		format.mayOnlyBe(FormatPAX)
	}
	if len(h.PAXRecords) > 0 {
		for k, v := range h.PAXRecords {
			switch _, exists := paxHdrs[k]; {
			case exists:
				continue // Do not overwrite existing records
			case h.Typeflag == TypeXGlobalHeader:
				paxHdrs[k] = v // Copy all records
			case !basicKeys[k] && !strings.HasPrefix(k, paxGNUSparse):

may include command line options.

The cgo tool will always invoke the C compiler with the source file's
directory in the include path; i.e. -I${SRCDIR} is always implied. This
means that if a header file foo/bar.h exists both in the source
directory and also in the system include directory (or some other place
specified by a -I flag), then "#include <foo/bar.h>" will always find the
local version in preference to any other version.

	}
	if dict["ImagePresent"] == "true" && dict["Status"] == "Complete" {
		return nil
	}
	// Some devices only give us an ImageSignature key.
	if _, exists := dict["ImageSignature"]; exists {
		return nil
	}
	// No image is mounted. Find a suitable image.
	imgPath, err := findDevImage()
	if err != nil {
		return err
	}
	sigPath := imgPath + ".signature"

			for _, c := range blk {
				if c == '\n' {
					cntNewline++
				}
			}
		}
		return nil
	}

	// nextToken gets the next token delimited by a newline. This assumes that
	// at least one newline exists in the buffer.
	nextToken := func() string {
		cntNewline--
		tok, _ := buf.ReadString('\n')
		return strings.TrimRight(tok, "\n")
	}

	// Parse for the number of entries.

	t.msg = "hello, world"
	g = t
}

func main() {
	go setup()
	for g == nil {
	}
	print(g.msg)
}
</pre>

<p>
Even if <code>main</code> observes <code>g != nil</code> and exits its loop,
there is no guarantee that it will observe the initialized
value for <code>g.msg</code>.
</p>

<p>
In all these examples, the solution is the same:
use explicit synchronization.
</p>

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

// This contains the valid opcode combinations available
// in cmd/internal/obj/ppc64/asm9.go which exist for
// POWER10/ISA 3.1.

#include "../../../../../runtime/textflag.h"

TEXT asmtest(SB), DUPOK|NOSPLIT, $0
	BRD R1, R2                              // 7c220176
	BRH R1, R2                              // 7c2201b6

	if !strings.Contains(f, "(") {
		return f
	}
	return spaceParensRx.ReplaceAllString(f, "")
}

// portRemoved reports whether the given port-specific API feature is
// okay to no longer exist because its port was removed.
func portRemoved(feature string) bool {
	return strings.Contains(feature, "(darwin-386)") ||
		strings.Contains(feature, "(darwin-386-cgo)")
}