{"ast_node_type":"variable","tokens":[{"end":94,"kind":"keyword","start":0,"text":"let"}]}
                    let cur_elem_ty = self.infer_expr_inner(expr, &expected, ExprIsRead::Yes);
                for &expr in elements.iter() {
                    coerce.coerce(self, Some(expr), &cur_elem_ty, CoercionCause::Expr(expr));