error: needlessly taken reference of both operands --> examples/op_ref.rs:13:15 | 13 | let foo = &5 - &6; | ^^^^^^^ | = note: `-D op-ref` implied by `-D warnings` help: use the values directly | let foo = 5 - 6; error: aborting due to previous error error: Could not compile `clippy_tests`. To learn more, run the command again with --verbose.