[INFO] updating cached repository howeih/Day-20-Linearithmic-multiplication
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/howeih/Day-20-Linearithmic-multiplication
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/howeih/Day-20-Linearithmic-multiplication" "work/ex/clippy-test-run/sources/stable/gh/howeih/Day-20-Linearithmic-multiplication"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/howeih/Day-20-Linearithmic-multiplication'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/howeih/Day-20-Linearithmic-multiplication" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/howeih/Day-20-Linearithmic-multiplication"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/howeih/Day-20-Linearithmic-multiplication'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 90776a95e54a5e2a3b0bb10dd1064749484f6588
[INFO] sha for GitHub repo howeih/Day-20-Linearithmic-multiplication: 90776a95e54a5e2a3b0bb10dd1064749484f6588
[INFO] validating manifest of howeih/Day-20-Linearithmic-multiplication 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 howeih/Day-20-Linearithmic-multiplication 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 howeih/Day-20-Linearithmic-multiplication
[INFO] finished frobbing howeih/Day-20-Linearithmic-multiplication
[INFO] frobbed toml for howeih/Day-20-Linearithmic-multiplication written to work/ex/clippy-test-run/sources/stable/gh/howeih/Day-20-Linearithmic-multiplication/Cargo.toml
[INFO] started frobbing howeih/Day-20-Linearithmic-multiplication
[INFO] finished frobbing howeih/Day-20-Linearithmic-multiplication
[INFO] frobbed toml for howeih/Day-20-Linearithmic-multiplication written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/howeih/Day-20-Linearithmic-multiplication/Cargo.toml
[INFO] crate howeih/Day-20-Linearithmic-multiplication 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 howeih/Day-20-Linearithmic-multiplication 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/howeih/Day-20-Linearithmic-multiplication:/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] 6627c33b7473a44291c1e93f6b06aead9776294c014cf53835f428d49823d9bc
[INFO] running `"docker" "start" "-a" "6627c33b7473a44291c1e93f6b06aead9776294c014cf53835f428d49823d9bc"`
[INFO] [stderr]     Checking rustfft v2.0.0
[INFO] [stderr]     Checking linearithmic_multiplication v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:20:30
[INFO] [stderr]    |
[INFO] [stderr] 20 |         fx[i] = Complex::new(c.to_digit(10).unwrap() as f64, 0.);
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(c.to_digit(10).unwrap())`
[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] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |         z[i] = z[i] % 10
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^ help: replace it with: `z[i] %= 10`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:20:30
[INFO] [stderr]    |
[INFO] [stderr] 20 |         fx[i] = Complex::new(c.to_digit(10).unwrap() as f64, 0.);
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(c.to_digit(10).unwrap())`
[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] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |         z[i] = z[i] % 10
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^ help: replace it with: `z[i] %= 10`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.89s
[INFO] running `"docker" "inspect" "6627c33b7473a44291c1e93f6b06aead9776294c014cf53835f428d49823d9bc"`
[INFO] running `"docker" "rm" "-f" "6627c33b7473a44291c1e93f6b06aead9776294c014cf53835f428d49823d9bc"`
[INFO] [stdout] 6627c33b7473a44291c1e93f6b06aead9776294c014cf53835f428d49823d9bc