if_chain! {
if let ast::ExprKind::Call(ref paren, _) = expr.kind;
if let ast::ExprKind::Paren(ref closure) = paren.kind;
- if let ast::ExprKind::Closure(_, _, _, ref decl, ref block, _) = closure.kind;
+ if let ast::ExprKind::Closure(_, _, _, _, ref decl, ref block, _) = closure.kind;
then {
let mut visitor = ReturnVisitor::new();
visitor.visit_expr(block);