1 error[E0658]: no_core is experimental (see issue #29639)
2 --> $DIR/feature-gate-no_core.rs:11:1
4 LL | #![no_core] //~ ERROR no_core is experimental
7 = help: add #![feature(no_core)] to the crate attributes to enable
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0658`.