error[E0119]: conflicting implementations of trait `Trait` for type `(dyn Send + Sync + 'static)` --> $DIR/issue-33140.rs:9:1 | LL | impl Trait for dyn Send + Sync { | ------------------------------ first implementation here ... LL | impl Trait for dyn Sync + Send { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn Send + Sync + 'static)` error[E0119]: conflicting implementations of trait `Trait2` for type `(dyn Send + Sync + 'static)` --> $DIR/issue-33140.rs:22:1 | LL | impl Trait2 for dyn Send + Sync { | ------------------------------- first implementation here ... LL | impl Trait2 for dyn Sync + Send + Sync { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `(dyn Send + Sync + 'static)` error[E0592]: duplicate definitions with name `abc` --> $DIR/issue-33140.rs:29:5 | LL | fn abc() -> bool { | ^^^^^^^^^^^^^^^^ duplicate definitions for `abc` ... LL | fn abc() -> bool { | ---------------- other definition for `abc` error: aborting due to 3 previous errors Some errors have detailed explanations: E0119, E0592. For more information about an error, try `rustc --explain E0119`.