[INFO] updating cached repository IGI-111/mazer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/IGI-111/mazer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/IGI-111/mazer" "work/ex/clippy-test-run/sources/stable/gh/IGI-111/mazer"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/IGI-111/mazer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/IGI-111/mazer" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/IGI-111/mazer"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/IGI-111/mazer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 82941ffea27a61243becd2d0941782cab94ae8dd
[INFO] sha for GitHub repo IGI-111/mazer: 82941ffea27a61243becd2d0941782cab94ae8dd
[INFO] validating manifest of IGI-111/mazer 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 IGI-111/mazer 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 IGI-111/mazer
[INFO] finished frobbing IGI-111/mazer
[INFO] frobbed toml for IGI-111/mazer written to work/ex/clippy-test-run/sources/stable/gh/IGI-111/mazer/Cargo.toml
[INFO] started frobbing IGI-111/mazer
[INFO] finished frobbing IGI-111/mazer
[INFO] frobbed toml for IGI-111/mazer written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/IGI-111/mazer/Cargo.toml
[INFO] crate IGI-111/mazer 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 IGI-111/mazer against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/IGI-111/mazer:/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] 7e0d17efacebdffa68c8097c78ff48bb4be8697124938bf8f12e096e1f03c156
[INFO] running `"docker" "start" "-a" "7e0d17efacebdffa68c8097c78ff48bb4be8697124938bf8f12e096e1f03c156"`
[INFO] [stderr]     Checking alga v0.5.4
[INFO] [stderr]    Compiling syn v0.14.8
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking rusttype v0.5.2
[INFO] [stderr]     Checking env_logger v0.5.12
[INFO] [stderr]     Checking quickcheck v0.6.2
[INFO] [stderr]     Checking nalgebra v0.13.1
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]     Checking imageproc v0.15.0
[INFO] [stderr]     Checking mazer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/maze.rs:38:15
[INFO] [stderr]    |
[INFO] [stderr] 38 |         while stack.len() > 0 {
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!stack.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/maze.rs:47:16
[INFO] [stderr]    |
[INFO] [stderr] 47 |             if adj.len() == 0 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `adj.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/maze.rs:38:15
[INFO] [stderr]    |
[INFO] [stderr] 38 |         while stack.len() > 0 {
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!stack.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/maze.rs:47:16
[INFO] [stderr]    |
[INFO] [stderr] 47 |             if adj.len() == 0 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `adj.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 50.37s
[INFO] running `"docker" "inspect" "7e0d17efacebdffa68c8097c78ff48bb4be8697124938bf8f12e096e1f03c156"`
[INFO] running `"docker" "rm" "-f" "7e0d17efacebdffa68c8097c78ff48bb4be8697124938bf8f12e096e1f03c156"`
[INFO] [stdout] 7e0d17efacebdffa68c8097c78ff48bb4be8697124938bf8f12e096e1f03c156