error[E0197]: inherent impls cannot be unsafe
  --> $DIR/trait-safety-inherent-impl.rs:5:1
   |
LL | / unsafe impl SomeStruct {
LL | |     fn foo(self) { }
LL | | }
   | |_^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0197`.