1 error[E0200]: the trait `Bar` requires an `unsafe impl` declaration
4 LL | impl Bar for Foo { }
7 = note: the trait `Bar` enforces invariants that the compiler can't check. Review the trait documentation and make sure this implementation upholds those invariants before adding the `unsafe` keyword
8 help: add `unsafe` to this trait implementation
10 LL | unsafe impl Bar for Foo { }
13 error: aborting due to previous error
15 For more information about this error, try `rustc --explain E0200`.