switch x.mode {
	case invalid:
		return Typ[Invalid]
	case variable, mapindex:
		// ok
	default:
		if sel, ok := x.expr.(*ast.SelectorExpr); ok {
			var op operand
			check.expr(nil, &op, sel.X)
			if op.mode == mapindex {
				check.errorf(&x, UnaddressableFieldAssign, "cannot assign to struct field %s in map", ExprString(x.expr))
				return Typ[Invalid]
			}
		}

	// but at least check that it's *M or *something.M.
	// Same applies for B, F and T.
	if name, ok := ptr.X.(*ast.Ident); ok && name.Name == arg {
		return true
	}
	if sel, ok := ptr.X.(*ast.SelectorExpr); ok && sel.Sel.Name == arg {
		return true
	}
	return false
}

// isTest tells whether name looks like a test (or benchmark, according to prefix).

	switch x.mode {
	case invalid:
		return Typ[Invalid]
	case variable, mapindex:
		// ok
	default:
		if sel, ok := x.expr.(*syntax.SelectorExpr); ok {
			var op operand
			check.expr(nil, &op, sel.X)
			if op.mode == mapindex {
				check.errorf(&x, UnaddressableFieldAssign, "cannot assign to struct field %s in map", ExprString(x.expr))
				return Typ[Invalid]
			}

            def details = args[0]
            Collection<ComponentResolutionState> candidates = details.candidates
            def sel = candidates.find { it.id.name == 'b' }
            assert sel
            details.select(sel)
        }
        0 * conflictResolver._

        when:
        def result = resolve()
        result.rethrowFailure()

        then:

		return types.NamespacedName{}, err
	}
	selector := ds.Spec.Selector
	if selector == nil {
		return types.NamespacedName{}, fmt.Errorf("selector is required")
	}

	sel := selector.MatchLabels
	kv := []string{}
	for k, v := range sel {
		kv = append(kv, k+"="+v)
	}
	podsr, err := client.Kube().CoreV1().Pods(namespace).List(context.Background(), metav1.ListOptions{
		TypeMeta:      metav1.TypeMeta{},

// that picks the correct abbrev.
func pvacfgvisit(pvacfg *pvacfgnode, abbrevs map[string]int) ast.Stmt {
	r := &ast.IfStmt{Cond: &ast.BinaryExpr{
		Op: token.EQL,
		X:  &ast.SelectorExpr{X: &ast.Ident{Name: "v"}, Sel: &ast.Ident{Name: "Tag"}},
		Y:  &ast.Ident{Name: "DW_TAG_variable"}}}
	r.Body = &ast.BlockStmt{List: []ast.Stmt{
		pvacfgvisitnode(pvacfg, "DW_TAG_variable", []*pvacfgnode{}, abbrevs),
	}}

	if err != nil {
		t.Fatal(err)
	}

	mutex := imports["sync"].Scope().Lookup("Mutex").(*types.TypeName).Type()
	mset := types.NewMethodSet(types.NewPointer(mutex)) // methods of *sync.Mutex
	sel := mset.Lookup(nil, "Lock")
	lock := sel.Obj().(*types.Func)
	if got, want := lock.Pkg().Path(), "sync"; got != want {
		t.Errorf("got package path %q; want %q", got, want)
	}
}

func TestIssue13566(t *testing.T) {

func checkCopyLocksCallExpr(pass *analysis.Pass, ce *ast.CallExpr) {
	var id *ast.Ident
	switch fun := ce.Fun.(type) {
	case *ast.Ident:
		id = fun
	case *ast.SelectorExpr:
		id = fun.Sel
	}
	if fun, ok := pass.TypesInfo.Uses[id].(*types.Builtin); ok {
		switch fun.Name() {
		case "new", "len", "cap", "Sizeof", "Offsetof", "Alignof":
			return
		}
	}
	for _, x := range ce.Args {

		// This one is not a selector, it must be an exact match
		if sel := mustGetLabels(t, deployment, "spec.selector.matchLabels"); !reflect.DeepEqual(deploymentSelector, sel) {
			t.Fatalf("Depployment selectors are immutable, but changed since 1.5. Was %v, now is %v", deploymentSelector, sel)
		}
	})
}

	case *ast.IndexListExpr:
		selOrIdent = e.X
	case *ast.SelectorExpr, *ast.Ident:
		selOrIdent = e
	}
	switch x := selOrIdent.(type) {
	case *ast.Ident:
		return x
	case *ast.SelectorExpr:
		return x.Sel
	}

	// extra debugging of #63933
	var buf strings.Builder
	buf.WriteString("instantiated ident not found; please report: ")
	ast.Fprint(&buf, token.NewFileSet(), expr, ast.NotNilFilter)
	panic(buf.String())