error: this call to `as_ref` does nothing --> $DIR/useless_asref.rs:50:18 | LL | foo_rstr(rstr.as_ref()); | ^^^^^^^^^^^^^ help: try this: `rstr` | note: lint level defined here --> $DIR/useless_asref.rs:10:9 | LL | #![deny(clippy::useless_asref)] | ^^^^^^^^^^^^^^^^^^^^^ error: this call to `as_ref` does nothing --> $DIR/useless_asref.rs:52:20 | LL | foo_rslice(rslice.as_ref()); | ^^^^^^^^^^^^^^^ help: try this: `rslice` error: this call to `as_mut` does nothing --> $DIR/useless_asref.rs:56:21 | LL | foo_mrslice(mrslice.as_mut()); | ^^^^^^^^^^^^^^^^ help: try this: `mrslice` error: this call to `as_ref` does nothing --> $DIR/useless_asref.rs:58:20 | LL | foo_rslice(mrslice.as_ref()); | ^^^^^^^^^^^^^^^^ help: try this: `mrslice` error: this call to `as_ref` does nothing --> $DIR/useless_asref.rs:65:20 | LL | foo_rslice(rrrrrslice.as_ref()); | ^^^^^^^^^^^^^^^^^^^ help: try this: `rrrrrslice` error: this call to `as_ref` does nothing --> $DIR/useless_asref.rs:67:18 | LL | foo_rstr(rrrrrstr.as_ref()); | ^^^^^^^^^^^^^^^^^ help: try this: `rrrrrstr` error: this call to `as_mut` does nothing --> $DIR/useless_asref.rs:72:21 | LL | foo_mrslice(mrrrrrslice.as_mut()); | ^^^^^^^^^^^^^^^^^^^^ help: try this: `mrrrrrslice` error: this call to `as_ref` does nothing --> $DIR/useless_asref.rs:74:20 | LL | foo_rslice(mrrrrrslice.as_ref()); | ^^^^^^^^^^^^^^^^^^^^ help: try this: `mrrrrrslice` error: this call to `as_ref` does nothing --> $DIR/useless_asref.rs:77:16 | LL | foo_rrrrmr((&&&&MoreRef).as_ref()); | ^^^^^^^^^^^^^^^^^^^^^^ help: try this: `(&&&&MoreRef)` error: this call to `as_mut` does nothing --> $DIR/useless_asref.rs:127:13 | LL | foo_mrt(mrt.as_mut()); | ^^^^^^^^^^^^ help: try this: `mrt` error: this call to `as_ref` does nothing --> $DIR/useless_asref.rs:129:12 | LL | foo_rt(mrt.as_ref()); | ^^^^^^^^^^^^ help: try this: `mrt` error: aborting due to 11 previous errors