1 error[E0658]: custom test frameworks are an unstable feature (see issue #50297)
2 --> $DIR/feature-gate-custom_test_frameworks.rs:11:1
4 LL | #![test_runner(main)] //~ ERROR custom test frameworks are an unstable feature
5 | ^^^^^^^^^^^^^^^^^^^^^
7 = help: add #![feature(custom_test_frameworks)] to the crate attributes to enable
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0658`.