{"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"//"}]}
            // `{ 42 } &&x` (#61475) or `{ 42 } && if x { 1 } else { 0 }`
        if let Some(sp) = self.tcx.sess.psess.ambiguous_block_expr_parse.borrow().get(&sp) {
            err.subdiagnostic(ExprParenthesesNeeded::surrounding(*sp));