error: handle written amount returned or use `Write::write_all` instead --> $DIR/unused_io_amount.rs:11:5 | 11 | try!(s.write(b"test")); | ^^^^^^^^^^^^^^^^^^^^^^^ | = note: `-D unused-io-amount` implied by `-D warnings` = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) error: handle read amount returned or use `Read::read_exact` instead --> $DIR/unused_io_amount.rs:13:5 | 13 | try!(s.read(&mut buf)); | ^^^^^^^^^^^^^^^^^^^^^^^ | = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) error: handle written amount returned or use `Write::write_all` instead --> $DIR/unused_io_amount.rs:18:5 | 18 | s.write(b"test")?; | ^^^^^^^^^^^^^^^^^ error: handle read amount returned or use `Read::read_exact` instead --> $DIR/unused_io_amount.rs:20:5 | 20 | s.read(&mut buf)?; | ^^^^^^^^^^^^^^^^^ error: handle written amount returned or use `Write::write_all` instead --> $DIR/unused_io_amount.rs:25:5 | 25 | s.write(b"test").unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^ error: handle read amount returned or use `Read::read_exact` instead --> $DIR/unused_io_amount.rs:27:5 | 27 | s.read(&mut buf).unwrap(); | ^^^^^^^^^^^^^^^^^^^^^^^^^