error[E0283]: type annotations needed: cannot satisfy `u32: C` --> $DIR/coherence-overlap-trait-alias.rs:15:12 | LL | impl C for u32 {} | ^^^ | note: multiple `impl`s satisfying `u32: C` found --> $DIR/coherence-overlap-trait-alias.rs:14:1 | LL | impl C for T {} | ^^^^^^^^^^^^^^^^^^^ LL | impl C for u32 {} | ^^^^^^^^^^^^^^ error: aborting due to previous error For more information about this error, try `rustc --explain E0283`.