[INFO] updating cached repository limitLiu/learn-rust-by-rust-book
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/limitLiu/learn-rust-by-rust-book
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/limitLiu/learn-rust-by-rust-book" "work/ex/clippy-test-run/sources/stable/gh/limitLiu/learn-rust-by-rust-book"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/limitLiu/learn-rust-by-rust-book'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/limitLiu/learn-rust-by-rust-book" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/limitLiu/learn-rust-by-rust-book"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/limitLiu/learn-rust-by-rust-book'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2b14b2b71e55287d94a0c259e089c3e31229bab3
[INFO] sha for GitHub repo limitLiu/learn-rust-by-rust-book: 2b14b2b71e55287d94a0c259e089c3e31229bab3
[INFO] validating manifest of limitLiu/learn-rust-by-rust-book 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 limitLiu/learn-rust-by-rust-book 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 limitLiu/learn-rust-by-rust-book
[INFO] finished frobbing limitLiu/learn-rust-by-rust-book
[INFO] frobbed toml for limitLiu/learn-rust-by-rust-book written to work/ex/clippy-test-run/sources/stable/gh/limitLiu/learn-rust-by-rust-book/Cargo.toml
[INFO] started frobbing limitLiu/learn-rust-by-rust-book
[INFO] finished frobbing limitLiu/learn-rust-by-rust-book
[INFO] frobbed toml for limitLiu/learn-rust-by-rust-book written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/limitLiu/learn-rust-by-rust-book/Cargo.toml
[INFO] crate limitLiu/learn-rust-by-rust-book 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 limitLiu/learn-rust-by-rust-book against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-7/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/limitLiu/learn-rust-by-rust-book:/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 -Dclippy::into_iter_on_array" "-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] b1c3bc7b7538ee03f1efeb5a55d7e43367d6fca1334f724f749d6e2a1803b82e
[INFO] running `"docker" "start" "-a" "b1c3bc7b7538ee03f1efeb5a55d7e43367d6fca1334f724f749d6e2a1803b82e"`
[INFO] [stderr]     Checking learn-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]  --> src/_1_common_programming_concepts/_2_data_types.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let e = -3; // default i32
[INFO] [stderr]   |         ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]  --> src/_1_common_programming_concepts/_2_data_types.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let f = 2u32;
[INFO] [stderr]   |         ^
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]  --> src/_1_common_programming_concepts/_2_data_types.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let g = -4i64;
[INFO] [stderr]   |         ^
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let h = 3u64;
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 9th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let i = -5isize;
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 10th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let j = 4usize;
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 11th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let k = 1.0; // default f64
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 12th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let l = 2.0f32;
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 13th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let t = true;
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 14th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let z = 'z';
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 15th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:39:10
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let (o, p, q) = tup;
[INFO] [stderr]    |          ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 16th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let (o, p, q) = tup;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 17th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:39:16
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let (o, p, q) = tup;
[INFO] [stderr]    |                ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/_8_smart_pointers/_8_2_deref.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let m = MyBox::new("world".to_string());
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]  --> src/_1_common_programming_concepts/_2_data_types.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let e = -3; // default i32
[INFO] [stderr]   |         ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]  --> src/_1_common_programming_concepts/_2_data_types.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let f = 2u32;
[INFO] [stderr]   |         ^
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]  --> src/_1_common_programming_concepts/_2_data_types.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let g = -4i64;
[INFO] [stderr]   |         ^
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let h = 3u64;
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 9th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let i = -5isize;
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 10th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let j = 4usize;
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 11th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let k = 1.0; // default f64
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 12th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let l = 2.0f32;
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 13th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let t = true;
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 14th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let z = 'z';
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 15th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:39:10
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let (o, p, q) = tup;
[INFO] [stderr]    |          ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 16th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let (o, p, q) = tup;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 17th binding whose name is just one char
[INFO] [stderr]   --> src/_1_common_programming_concepts/_2_data_types.rs:39:16
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let (o, p, q) = tup;
[INFO] [stderr]    |                ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/_8_smart_pointers/_8_2_deref.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let m = MyBox::new("world".to_string());
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax, uniform_paths)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `learn-rs`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax, uniform_paths)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `learn-rs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b1c3bc7b7538ee03f1efeb5a55d7e43367d6fca1334f724f749d6e2a1803b82e"`
[INFO] running `"docker" "rm" "-f" "b1c3bc7b7538ee03f1efeb5a55d7e43367d6fca1334f724f749d6e2a1803b82e"`
[INFO] [stdout] b1c3bc7b7538ee03f1efeb5a55d7e43367d6fca1334f724f749d6e2a1803b82e