error[E0119]: conflicting implementations of trait `From` for type `()` --> $DIR/issue-67651.rs:11:1 | LL | impl From for () { | ---------------- first implementation here ... LL | impl From for () { | ^^^^^^^^^^^^^^^^ conflicting implementation for `()` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0119`.