1 #### Note: this error code is no longer emitted by the compiler.
3 A negative impl was added on a trait implementation.
5 Erroneous code example:
14 impl !Trait for Foo { } //~ ERROR
19 Negative impls are only allowed for auto traits. For more
20 information see the [opt-in builtin traits RFC][RFC 19].
22 [RFC 19]: https://github.com/rust-lang/rfcs/blob/master/text/0019-opt-in-builtin-traits.md