// even with a nil *Checker
	res, err := Instantiate(nil, T, []Type{Typ[Int]}, false)
	if err != nil {
		t.Fatal(err)
	}

	// instantiated type should point to itself
	if p := res.Underlying().(*Pointer).Elem(); p != res {
		t.Fatalf("unexpected result type: %s points to %s", res, p)
	}
}

func TestInstantiateConcurrent(t *testing.T) {
	const src = `package p

type I[P any] interface {
	m(P)

	// even with a nil *Checker
	res, err := Instantiate(nil, T, []Type{Typ[Int]}, false)
	if err != nil {
		t.Fatal(err)
	}

	// instantiated type should point to itself
	if p := res.Underlying().(*Pointer).Elem(); p != res {
		t.Fatalf("unexpected result type: %s points to %s", res, p)
	}
}

func TestInstantiateConcurrent(t *testing.T) {
	const src = `package p

type I[P any] interface {
	m(P)

spatch||k.preDispatch.call(this,b)!==!1){h=r.event.handlers.call(this,b,j),c=0;while((f=h[c++])&&!b.isPropagationStopped()){b.currentTarget=f.elem,d=0;while((g=f.handlers[d++])&&!b.isImmediatePropagationStopped())b.rnamespace&&!b.rnamespace.test(g.namespace)||(b.handleObj=g,b.data=g.data,e=((r.event.special[g.origType]||{}).handle||g.handler).apply(f.elem,i),void 0!==e&&(b.result=e)===!1&&(b.preventDefault(),b.stopPropagation()))}return k.postDispatch&&k.postDispatch.call(this,b),b.result}},hand...

				transformer := transformerFromOverrides(transformers, schema.ParseGroupResource(resource))
				transformerName := string(
					reflect.ValueOf(transformer).Elem().FieldByName("transformers").Index(0).FieldByName("Prefix").Bytes(),
				)

				if transformerName != expectedTransformerName {

	if called != (1<<expectedCount)-1 {
		t.Fatalf("expected %d calls but saw calls %b", expectedCount, called)
	}
}

func TestCloneNonFuncFields(t *testing.T) {
	var c1 Config
	v := reflect.ValueOf(&c1).Elem()

	typ := v.Type()
	for i := 0; i < typ.NumField(); i++ {
		f := v.Field(i)
		// testing/quick can't handle functions or interfaces and so
		// isn't used here.
		switch fn := typ.Field(i).Name; fn {

(OffPtr [off] ptr) => (ADDconst [int32(off)] ptr)

(Addr {sym} base) => (MOVWaddr {sym} base)
(LocalAddr <t> {sym} base mem) && t.Elem().HasPointers() => (MOVWaddr {sym} (SPanchored base mem))
(LocalAddr <t> {sym} base _)  && !t.Elem().HasPointers() => (MOVWaddr {sym} base)

// loads
(Load <t> ptr mem) && t.IsBoolean() => (MOVBUload ptr mem)

(HasCPUFeature {s}) => (SETNE (CMPLconst [0] (LoweredHasCPUFeature {s})))
(Addr {sym} base) => (LEAQ {sym} base)
(LocalAddr <t> {sym} base mem) && t.Elem().HasPointers() => (LEAQ {sym} (SPanchored base mem))
(LocalAddr <t> {sym} base _)  && !t.Elem().HasPointers() => (LEAQ {sym} base)

(MOVBstore [off] {sym} ptr y:(SETL x) mem) && y.Uses == 1 => (SETLstore [off] {sym} ptr x mem)

			`</top>` {
			// TODO(rogpeppe): re-enable this test in
			// https://go-review.googlesource.com/#/c/5910/
			continue
		}

		vt := reflect.TypeOf(test.Value)
		dest := reflect.New(vt.Elem()).Interface()
		err := Unmarshal([]byte(test.ExpectXML), dest)

		t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
			switch fix := dest.(type) {
			case *Feed:
				fix.Author.InnerXML = ""

		// these fields are chosen such that, if status is extracted as properties["status"], it's validation is not lost.
		if statusSubresourceEnabled {
			v := reflect.ValueOf(schema).Elem()
			for i := 0; i < v.NumField(); i++ {
				// skip zero values
				if value := v.Field(i).Interface(); reflect.DeepEqual(value, reflect.Zero(reflect.TypeOf(value)).Interface()) {
					continue
				}

		}
	}
}

// Test to catch new fields in FilterChainMatch message.
func TestFilterChainMatchFields(t *testing.T) {
	fcm := listener.FilterChainMatch{}
	e := reflect.ValueOf(&fcm).Elem()
	// If this fails, that means new fields have been added to FilterChainMatch, filterChainMatchEqual function needs to be updated.
	if e.NumField() != 14 {