1error[E0658]: use of unstable library feature 'log_syntax': `log_syntax!` is not stable enough for use and is subject to change 2 --> $DIR/feature-gate-log_syntax2.rs:2:22 3 | 4LL | println!("{:?}", log_syntax!()); 5 | ^^^^^^^^^^ 6 | 7 = note: see issue #29598 <https://github.com/rust-lang/rust/issues/29598> for more information 8 = help: add `#![feature(log_syntax)]` to the crate attributes to enable 9 10error: aborting due to previous error 11 12For more information about this error, try `rustc --explain E0658`. 13