[INFO] updating cached repository solson/brainrust [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/solson/brainrust [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/solson/brainrust" "work/ex/clippy-test-run/sources/stable/gh/solson/brainrust"` [INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/solson/brainrust'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/solson/brainrust" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/solson/brainrust"` [INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/solson/brainrust'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 3ab5db3272eb77f0aeabc12c9b56e0370e32540c [INFO] sha for GitHub repo solson/brainrust: 3ab5db3272eb77f0aeabc12c9b56e0370e32540c [INFO] validating manifest of solson/brainrust on toolchain stable [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of solson/brainrust on toolchain stable+rustflags=-Dclippy::into_iter_on_array [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing solson/brainrust [INFO] finished frobbing solson/brainrust [INFO] frobbed toml for solson/brainrust written to work/ex/clippy-test-run/sources/stable/gh/solson/brainrust/Cargo.toml [INFO] started frobbing solson/brainrust [INFO] finished frobbing solson/brainrust [INFO] frobbed toml for solson/brainrust written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/solson/brainrust/Cargo.toml [INFO] crate solson/brainrust has a lockfile. skipping [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] linting solson/brainrust against stable for clippy-test-run [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/solson/brainrust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"` [INFO] [stdout] 0544fe2a3b68e16f2313510815ea7b8030ef62c0aed520a8e937ca1715c7eb4b [INFO] running `"docker" "start" "-a" "0544fe2a3b68e16f2313510815ea7b8030ef62c0aed520a8e937ca1715c7eb4b"` [INFO] [stderr] Checking brainrust v0.0.1 (/opt/crater/workdir) [INFO] [stderr] warning: struct is never constructed: `CircularTape` [INFO] [stderr] --> src/main.rs:85:1 [INFO] [stderr] | [INFO] [stderr] 85 | struct CircularTape { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/main.rs:91:5 [INFO] [stderr] | [INFO] [stderr] 91 | fn new(size: usize) -> CircularTape { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let` [INFO] [stderr] --> src/main.rs:117:17 [INFO] [stderr] | [INFO] [stderr] 117 | / match input.read(&mut byte) { [INFO] [stderr] 118 | | Ok(_) => tape.write(byte[0]), [INFO] [stderr] 119 | | Err(_) => {} // Do nothing on EOF. [INFO] [stderr] 120 | | } [INFO] [stderr] | |_________________^ help: try this: `if let Ok(_) = input.read(&mut byte) { tape.write(byte[0]) }` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::single_match)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match [INFO] [stderr] [INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead [INFO] [stderr] --> src/main.rs:122:28 [INFO] [stderr] | [INFO] [stderr] 122 | Op::Write => { try!(output.write(&[tape.read(); 1])); }, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[deny(clippy::unused_io_amount)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount [INFO] [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] error: aborting due to previous error [INFO] [stderr] [INFO] [stderr] error: Could not compile `brainrust`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] warning: struct is never constructed: `CircularTape` [INFO] [stderr] --> src/main.rs:85:1 [INFO] [stderr] | [INFO] [stderr] 85 | struct CircularTape { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/main.rs:91:5 [INFO] [stderr] | [INFO] [stderr] 91 | fn new(size: usize) -> CircularTape { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let` [INFO] [stderr] --> src/main.rs:117:17 [INFO] [stderr] | [INFO] [stderr] 117 | / match input.read(&mut byte) { [INFO] [stderr] 118 | | Ok(_) => tape.write(byte[0]), [INFO] [stderr] 119 | | Err(_) => {} // Do nothing on EOF. [INFO] [stderr] 120 | | } [INFO] [stderr] | |_________________^ help: try this: `if let Ok(_) = input.read(&mut byte) { tape.write(byte[0]) }` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::single_match)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match [INFO] [stderr] [INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead [INFO] [stderr] --> src/main.rs:122:28 [INFO] [stderr] | [INFO] [stderr] 122 | Op::Write => { try!(output.write(&[tape.read(); 1])); }, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[deny(clippy::unused_io_amount)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount [INFO] [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] error: aborting due to previous error [INFO] [stderr] [INFO] [stderr] error: Could not compile `brainrust`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "0544fe2a3b68e16f2313510815ea7b8030ef62c0aed520a8e937ca1715c7eb4b"` [INFO] running `"docker" "rm" "-f" "0544fe2a3b68e16f2313510815ea7b8030ef62c0aed520a8e937ca1715c7eb4b"` [INFO] [stdout] 0544fe2a3b68e16f2313510815ea7b8030ef62c0aed520a8e937ca1715c7eb4b