File: strict-coherence-needs-negative-coherence.stderr

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error: to use `strict_coherence` on this trait, the `with_negative_coherence` feature must be enabled
  --> $DIR/strict-coherence-needs-negative-coherence.rs:4:1
   |
LL | #[rustc_strict_coherence]
   | ------------------------- due to this attribute
LL | trait Foo {}
   | ^^^^^^^^^

error: aborting due to previous error