error[E0725]: the feature `lang_items` is not in the list of allowed features --> $DIR/allow-features-empty.rs:4:12 | LL | #![feature(lang_items)] | ^^^^^^^^^^ error[E0725]: the feature `unknown_stdlib_feature` is not in the list of allowed features --> $DIR/allow-features-empty.rs:6:12 | LL | #![feature(unknown_stdlib_feature)] | ^^^^^^^^^^^^^^^^^^^^^^ error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0725`.