of an interface type or of elements of a composite type remains unchanged:
</p>

<pre>
// A Mutex is a data type with two methods, Lock and Unlock.
type Mutex struct         { /* Mutex fields */ }
func (m *Mutex) Lock()    { /* Lock implementation */ }
func (m *Mutex) Unlock()  { /* Unlock implementation */ }

// NewMutex has the same composition as Mutex but its method set is empty.

	STP	(R26, R27), 700(R2)                              // ERROR "cannot use REGTMP as source"
	MOVK	$0, R10                                          // ERROR "zero shifts cannot be handled correctly"
	MOVK	$(0<<32), R10                                    // ERROR "zero shifts cannot be handled correctly"
	TLBI	PLDL1KEEP                                        // ERROR "illegal argument"

of an interface type or of elements of a composite type remains unchanged:
</p>

<pre>
// A Mutex is a data type with two methods, Lock and Unlock.
type Mutex struct         { /* Mutex fields */ }
func (m *Mutex) Lock()    { /* Lock implementation */ }
func (m *Mutex) Unlock()  { /* Unlock implementation */ }

// NewMutex has the same composition as Mutex but its method set is empty.

	MOVD	$0xffffffffffffaaaa, R1       // MOVD	$-21846, R1                 // a1aa8a92
	MOVW	$1, ZR                        // 3f008052
	MOVW	$1, R1
	MOVD	$1, ZR                        // 3f0080d2
	MOVD	$1, R1
	MOVK	$1, R1
	MOVD	$0x1000100010001000, RSP      // MOVD	$1152939097061330944, RSP   // ff8304b2
	MOVW	$0x10001000, RSP              // MOVW	$268439552, RSP             // ff830432

var a string

func f() {
	a = "hello, world"
	l.Unlock()
}

func main() {
	l.Lock()
	go f()
	l.Lock()
	print(a)
}
</pre>

<p>
is guaranteed to print <code>"hello, world"</code>.
The first call to <code>l.Unlock()</code> (in <code>f</code>) is synchronized
before the second call to <code>l.Lock()</code> (in <code>main</code>) returns,
which is sequenced before the <code>print</code>.
</p>

</p>

<!-- CL 518776 -->
<p>
  <code>go</code> <code>mod</code> <code>init</code> no longer attempts to import
  module requirements from configuration files for other vendoring tools
  (such as <code>Gopkg.lock</code>).
</p>

<!-- CL 495447 -->
<p>
<code>go</code> <code>test</code> <code>-cover</code> now prints coverage summaries for covered
packages that do not have their own test files. Prior to Go 1.22 a