{"ast_node_type":"variable","tokens":[{"end":91,"kind":"keyword","start":0,"text":"if"}]}
                if let Some(sp) = this.psess.ambiguous_block_expr_parse.borrow().get(&lo) {
                // a block on the LHS might have been intended to be an expression instead
                    err.add_parentheses = Some(ExprParenthesesNeeded::surrounding(*sp));