error: unused import: `HashMap`
  --> $DIR/lint-unused-imports-self-single.rs:6:24
   |
LL | use std::collections::{HashMap, self as coll};
   |                        ^^^^^^^
   |
note: the lint level is defined here
  --> $DIR/lint-unused-imports-self-single.rs:3:9
   |
LL | #![deny(unused_imports)]
   |         ^^^^^^^^^^^^^^

error: unused import: `self as std_io`
  --> $DIR/lint-unused-imports-self-single.rs:9:15
   |
LL | use std::io::{self as std_io};
   |               ^^^^^^^^^^^^^^

error: unused import: `self as std_sync`
  --> $DIR/lint-unused-imports-self-single.rs:12:24
   |
LL | use std::sync::{Mutex, self as std_sync};
   |                        ^^^^^^^^^^^^^^^^

error: unused import: `self as std_sync_mpsc`
  --> $DIR/lint-unused-imports-self-single.rs:15:24
   |
LL | use std::sync::{mpsc::{self as std_sync_mpsc, Sender}};
   |                        ^^^^^^^^^^^^^^^^^^^^^

error: unused import: `Keys`
  --> $DIR/lint-unused-imports-self-single.rs:18:56
   |
LL | use std::collections::{hash_map::{self as std_coll_hm, Keys}};
   |                                                        ^^^^

error: unused import: `self`
  --> $DIR/lint-unused-imports-self-single.rs:21:19
   |
LL | use std::borrow::{self, Cow};
   |                   ^^^^

error: aborting due to 6 previous errors