[INFO] updating cached repository EvilRobotOverlord/mnist-dataset-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/EvilRobotOverlord/mnist-dataset-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/EvilRobotOverlord/mnist-dataset-rust" "work/ex/clippy-test-run/sources/stable/gh/EvilRobotOverlord/mnist-dataset-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/EvilRobotOverlord/mnist-dataset-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/EvilRobotOverlord/mnist-dataset-rust" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/EvilRobotOverlord/mnist-dataset-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/EvilRobotOverlord/mnist-dataset-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d7b48065345e32b3a432e72cc77512b86f513d3c
[INFO] sha for GitHub repo EvilRobotOverlord/mnist-dataset-rust: d7b48065345e32b3a432e72cc77512b86f513d3c
[INFO] validating manifest of EvilRobotOverlord/mnist-dataset-rust 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 EvilRobotOverlord/mnist-dataset-rust 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 EvilRobotOverlord/mnist-dataset-rust
[INFO] finished frobbing EvilRobotOverlord/mnist-dataset-rust
[INFO] frobbed toml for EvilRobotOverlord/mnist-dataset-rust written to work/ex/clippy-test-run/sources/stable/gh/EvilRobotOverlord/mnist-dataset-rust/Cargo.toml
[INFO] started frobbing EvilRobotOverlord/mnist-dataset-rust
[INFO] finished frobbing EvilRobotOverlord/mnist-dataset-rust
[INFO] frobbed toml for EvilRobotOverlord/mnist-dataset-rust written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/EvilRobotOverlord/mnist-dataset-rust/Cargo.toml
[INFO] crate EvilRobotOverlord/mnist-dataset-rust 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 EvilRobotOverlord/mnist-dataset-rust against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/EvilRobotOverlord/mnist-dataset-rust:/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] 1ee717ff8a25c789aec082cfd94c987caf5ce463eff8b1e71efa9d609b3c3c0d
[INFO] running `"docker" "start" "-a" "1ee717ff8a25c789aec082cfd94c987caf5ce463eff8b1e71efa9d609b3c3c0d"`
[INFO] [stderr]    Compiling ndarray v0.11.2
[INFO] [stderr]     Checking xattr v0.2.1
[INFO] [stderr]     Checking filetime v0.2.1
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking bincode v1.0.1
[INFO] [stderr]     Checking flate2 v1.0.1
[INFO] [stderr]     Checking tar v0.4.15
[INFO] [stderr]     Checking mnist-dataset-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]   --> src/read.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 | /     let height;
[INFO] [stderr] 41 | |
[INFO] [stderr] 42 | |     if one_d {
[INFO] [stderr] 43 | |         width = source.read_uint()? * source.read_uint()?;
[INFO] [stderr] ...  |
[INFO] [stderr] 47 | |         height = source.read_uint()?;
[INFO] [stderr] 48 | |     }
[INFO] [stderr]    | |_____^ help: it is more idiomatic to write: `let height = if one_d { ..; 1 } else { ..; source.read_uint()? };`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]   --> src/write.rs:51:45
[INFO] [stderr]    |
[INFO] [stderr] 51 |         self.dest.write_u64::<LittleEndian>(n as u64)
[INFO] [stderr]    |                                             ^^^^^^^^ help: try: `u64::from(n)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/write.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |         self.dest.write(&ARRAY_HEADER)?;
[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] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/write.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |         self.dest.write(data)?;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `mnist-dataset-rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]   --> src/read.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 | /     let height;
[INFO] [stderr] 41 | |
[INFO] [stderr] 42 | |     if one_d {
[INFO] [stderr] 43 | |         width = source.read_uint()? * source.read_uint()?;
[INFO] [stderr] ...  |
[INFO] [stderr] 47 | |         height = source.read_uint()?;
[INFO] [stderr] 48 | |     }
[INFO] [stderr]    | |_____^ help: it is more idiomatic to write: `let height = if one_d { ..; 1 } else { ..; source.read_uint()? };`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]   --> src/write.rs:51:45
[INFO] [stderr]    |
[INFO] [stderr] 51 |         self.dest.write_u64::<LittleEndian>(n as u64)
[INFO] [stderr]    |                                             ^^^^^^^^ help: try: `u64::from(n)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/write.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |         self.dest.write(&ARRAY_HEADER)?;
[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] 
[INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead
[INFO] [stderr]   --> src/write.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |         self.dest.write(data)?;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `mnist-dataset-rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1ee717ff8a25c789aec082cfd94c987caf5ce463eff8b1e71efa9d609b3c3c0d"`
[INFO] running `"docker" "rm" "-f" "1ee717ff8a25c789aec082cfd94c987caf5ce463eff8b1e71efa9d609b3c3c0d"`
[INFO] [stdout] 1ee717ff8a25c789aec082cfd94c987caf5ce463eff8b1e71efa9d609b3c3c0d