error: this write lock is used only for reading
  --> $DIR/readonly_write_lock.rs:16:22
   |
LL |         let writer = lock.write().unwrap();
   |                      ^^^^^^^^^^^^ help: consider using a read lock instead: `lock.read()`
   |
   = note: `-D clippy::readonly-write-lock` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::readonly_write_lock)]`

error: this write lock is used only for reading
  --> $DIR/readonly_write_lock.rs:23:22
   |
LL |         let writer = lock.write().unwrap();
   |                      ^^^^^^^^^^^^ help: consider using a read lock instead: `lock.read()`

error: aborting due to 2 previous errors