error[E0119]: conflicting implementations of trait `Into` for type `Foo` --> $DIR/coherence-treats-tait-ambig.rs:10:1 | LL | impl Into for Foo { | ^^^^^^^^^^^^^^^^^^^^ | = note: conflicting implementation in crate `core`: - impl Into for T where U: From; error: aborting due to previous error For more information about this error, try `rustc --explain E0119`.