1 error[E0428]: the name `A` is defined multiple times
2 --> $DIR/issue-3099-a.rs:3:1
5 | ------ previous definition of the type `A` here
8 | ^^^^^^ `A` redefined here
10 = note: `A` must be defined only once in the type namespace of this module
12 error: aborting due to previous error
14 For more information about this error, try `rustc --explain E0428`.