[INFO] updating cached repository Noah-Kennedy/rust_ack
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Noah-Kennedy/rust_ack
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Noah-Kennedy/rust_ack" "work/ex/clippy-test-run/sources/stable/gh/Noah-Kennedy/rust_ack"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/Noah-Kennedy/rust_ack'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Noah-Kennedy/rust_ack" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/Noah-Kennedy/rust_ack"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/Noah-Kennedy/rust_ack'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b505f611f7388cff578e35ba6917ed3d85d28040
[INFO] sha for GitHub repo Noah-Kennedy/rust_ack: b505f611f7388cff578e35ba6917ed3d85d28040
[INFO] validating manifest of Noah-Kennedy/rust_ack 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 Noah-Kennedy/rust_ack 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 Noah-Kennedy/rust_ack
[INFO] finished frobbing Noah-Kennedy/rust_ack
[INFO] frobbed toml for Noah-Kennedy/rust_ack written to work/ex/clippy-test-run/sources/stable/gh/Noah-Kennedy/rust_ack/Cargo.toml
[INFO] started frobbing Noah-Kennedy/rust_ack
[INFO] finished frobbing Noah-Kennedy/rust_ack
[INFO] frobbed toml for Noah-Kennedy/rust_ack written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/Noah-Kennedy/rust_ack/Cargo.toml
[INFO] crate Noah-Kennedy/rust_ack 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 Noah-Kennedy/rust_ack against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-3/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/Noah-Kennedy/rust_ack:/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] f36dabda918716f295d686e8dfa660eb0fd3aa28f757ef63098bc96ec661031f
[INFO] running `"docker" "start" "-a" "f36dabda918716f295d686e8dfa660eb0fd3aa28f757ef63098bc96ec661031f"`
[INFO] [stderr]     Checking rust_ack v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::time::Instant`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::time::Instant;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/benchmarking/mod.rs:18:61
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let duration = (seconds as f64) + ((nanos as f64) / 1000000000.0);
[INFO] [stderr]    |                                                             ^^^^^^^^^^^^ help: consider: `1_000_000_000.0`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]  --> src/ackermann_implementations/hyper_ack.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 |             for i in 1..b {
[INFO] [stderr]   |                 ^ help: consider using `_i` instead
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sample_size`
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let sample_size = 1000;
[INFO] [stderr]   |         ^^^^^^^^^^^ help: consider using `_sample_size` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `m`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let m = 3;
[INFO] [stderr]   |         ^ help: consider using `_m` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let n = 8;
[INFO] [stderr]    |         ^ help: consider using `_n` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `printing`
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let printing = false;
[INFO] [stderr]    |         ^^^^^^^^ help: consider using `_printing` instead
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `benchmark_ack`
[INFO] [stderr]   --> src/benchmarking/mod.rs:3:1
[INFO] [stderr]    |
[INFO] [stderr] 3  | / pub fn benchmark_ack(fun: fn(u64, u64) -> u64, name: &str, sample_size: u64, m: u64, n: u64,
[INFO] [stderr] 4  | |                  printing: bool) {
[INFO] [stderr] 5  | |     let mut total: f64 = 0.0;
[INFO] [stderr] 6  | |     for i in 0..sample_size {
[INFO] [stderr] ...  |
[INFO] [stderr] 29 | |     println!("{}({}, {}):\nSample Size:\t{}\nAverage Time:\t{}", name, m, n, sample_size, average);
[INFO] [stderr] 30 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `basic_ack`
[INFO] [stderr]  --> src/ackermann_implementations/basic_ack.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn basic_ack(m: u64, n: u64) -> u64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/benchmarking/mod.rs:18:44
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let duration = (seconds as f64) + ((nanos as f64) / 1000000000.0);
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^^ help: try: `f64::from(nanos)`
[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: unused import: `std::time::Instant`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::time::Instant;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/benchmarking/mod.rs:18:61
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let duration = (seconds as f64) + ((nanos as f64) / 1000000000.0);
[INFO] [stderr]    |                                                             ^^^^^^^^^^^^ help: consider: `1_000_000_000.0`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]  --> src/ackermann_implementations/hyper_ack.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 |             for i in 1..b {
[INFO] [stderr]   |                 ^ help: consider using `_i` instead
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sample_size`
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let sample_size = 1000;
[INFO] [stderr]   |         ^^^^^^^^^^^ help: consider using `_sample_size` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `m`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let m = 3;
[INFO] [stderr]   |         ^ help: consider using `_m` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let n = 8;
[INFO] [stderr]    |         ^ help: consider using `_n` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `printing`
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let printing = false;
[INFO] [stderr]    |         ^^^^^^^^ help: consider using `_printing` instead
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `benchmark_ack`
[INFO] [stderr]   --> src/benchmarking/mod.rs:3:1
[INFO] [stderr]    |
[INFO] [stderr] 3  | / pub fn benchmark_ack(fun: fn(u64, u64) -> u64, name: &str, sample_size: u64, m: u64, n: u64,
[INFO] [stderr] 4  | |                  printing: bool) {
[INFO] [stderr] 5  | |     let mut total: f64 = 0.0;
[INFO] [stderr] 6  | |     for i in 0..sample_size {
[INFO] [stderr] ...  |
[INFO] [stderr] 29 | |     println!("{}({}, {}):\nSample Size:\t{}\nAverage Time:\t{}", name, m, n, sample_size, average);
[INFO] [stderr] 30 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `basic_ack`
[INFO] [stderr]  --> src/ackermann_implementations/basic_ack.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn basic_ack(m: u64, n: u64) -> u64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/benchmarking/mod.rs:18:44
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let duration = (seconds as f64) + ((nanos as f64) / 1000000000.0);
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^^ help: try: `f64::from(nanos)`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.28s
[INFO] running `"docker" "inspect" "f36dabda918716f295d686e8dfa660eb0fd3aa28f757ef63098bc96ec661031f"`
[INFO] running `"docker" "rm" "-f" "f36dabda918716f295d686e8dfa660eb0fd3aa28f757ef63098bc96ec661031f"`
[INFO] [stdout] f36dabda918716f295d686e8dfa660eb0fd3aa28f757ef63098bc96ec661031f