error[E0428]: the name `A` is defined multiple times --> $DIR/issue-3099-a.rs:3:1 | LL | enum A { B, C } | ------ previous definition of the type `A` here LL | LL | enum A { D, E } | ^^^^^^ `A` redefined here | = note: `A` must be defined only once in the type namespace of this module error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0428`.