error[E0252]: the name `Arc` is defined multiple times --> $DIR/issue-26886.rs:2:5 | LL | use std::sync::{self, Arc}; | --- previous import of the type `Arc` here LL | use std::sync::Arc; //~ ERROR the name `Arc` is defined multiple times | ----^^^^^^^^^^^^^^- | | | | | `Arc` reimported here | help: remove unnecessary import | = note: `Arc` must be defined only once in the type namespace of this module error[E0252]: the name `sync` is defined multiple times --> $DIR/issue-26886.rs:4:5 | LL | use std::sync::{self, Arc}; | ---- previous import of the module `sync` here ... LL | use std::sync; //~ ERROR the name `sync` is defined multiple times | ----^^^^^^^^^- | | | | | `sync` reimported here | help: remove unnecessary import | = note: `sync` must be defined only once in the type namespace of this module error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0252`.