}
	r.topScope = r.topScope.Outer
}

func (r *resolver) openLabelScope() {
	r.labelScope = ast.NewScope(r.labelScope)
	r.targetStack = append(r.targetStack, nil)
}

func (r *resolver) closeLabelScope() {
	// resolve labels
	n := len(r.targetStack) - 1
	scope := r.labelScope
	for _, ident := range r.targetStack[n] {
		ident.Obj = scope.Lookup(ident.Name)
		if ident.Obj == nil && r.declErr != nil {