[INFO] updating cached repository deciduously/mifkad
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/deciduously/mifkad
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/deciduously/mifkad" "work/ex/clippy-test-run/sources/stable/gh/deciduously/mifkad"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/deciduously/mifkad'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/deciduously/mifkad" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/deciduously/mifkad"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/deciduously/mifkad'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4d299f7197e2467d7ec5e341fca255a8169c19be
[INFO] sha for GitHub repo deciduously/mifkad: 4d299f7197e2467d7ec5e341fca255a8169c19be
[INFO] validating manifest of deciduously/mifkad 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 deciduously/mifkad 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 deciduously/mifkad
[INFO] finished frobbing deciduously/mifkad
[INFO] frobbed toml for deciduously/mifkad written to work/ex/clippy-test-run/sources/stable/gh/deciduously/mifkad/Cargo.toml
[INFO] started frobbing deciduously/mifkad
[INFO] finished frobbing deciduously/mifkad
[INFO] frobbed toml for deciduously/mifkad written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/deciduously/mifkad/Cargo.toml
[INFO] crate deciduously/mifkad 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 deciduously/mifkad against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-2/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/deciduously/mifkad:/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] 0ad419ded6a5d6630afde7b81727313d3d7a5ec1ad91631a32483e062d127d71
[INFO] running `"docker" "start" "-a" "0ad419ded6a5d6630afde7b81727313d3d7a5ec1ad91631a32483e062d127d71"`
[INFO] [stderr]    Compiling actix-web v0.7.15
[INFO] [stderr]     Checking pretty_assertions v0.5.1
[INFO] [stderr]     Checking hostname v0.1.5
[INFO] [stderr]     Checking socket2 v0.3.8
[INFO] [stderr]     Checking backtrace-sys v0.1.24
[INFO] [stderr]     Checking miniz-sys v0.1.11
[INFO] [stderr]     Checking brotli-sys v0.3.2
[INFO] [stderr]     Checking ring v0.13.5
[INFO] [stderr]     Checking brotli2 v0.3.2
[INFO] [stderr]     Checking zip v0.5.0
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]     Checking flate2 v1.0.6
[INFO] [stderr]     Checking resolv-conf v0.6.1
[INFO] [stderr]     Checking tokio-threadpool v0.1.9
[INFO] [stderr]     Checking tokio-reactor v0.1.7
[INFO] [stderr]     Checking failure v0.1.3
[INFO] [stderr]     Checking error-chain v0.12.0
[INFO] [stderr]     Checking crossbeam-channel v0.3.3
[INFO] [stderr]     Checking cookie v0.11.0
[INFO] [stderr]     Checking quick-xml v0.13.1
[INFO] [stderr]     Checking tokio-fs v0.1.4
[INFO] [stderr]     Checking pretty_env_logger v0.3.0
[INFO] [stderr]     Checking tokio-tcp v0.1.2
[INFO] [stderr]     Checking tokio-uds v0.2.4
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio-signal v0.2.7
[INFO] [stderr]     Checking calamine v0.14.10
[INFO] [stderr]     Checking trust-dns-proto v0.5.0
[INFO] [stderr]     Checking tokio v0.1.13
[INFO] [stderr]     Checking trust-dns-resolver v0.10.0
[INFO] [stderr]     Checking actix v0.7.9
[INFO] [stderr]     Checking actix-net v0.2.4
[INFO] [stderr]     Checking mifkad v0.2.4 (/opt/crater/workdir)
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/backend/data.rs:276:17
[INFO] [stderr]     |
[INFO] [stderr] 276 |         assert!(school.classrooms.len() > 0)
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!school.classrooms.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]     Finished dev [unoptimized + debuginfo] target(s) in 1m 02s
[INFO] running `"docker" "inspect" "0ad419ded6a5d6630afde7b81727313d3d7a5ec1ad91631a32483e062d127d71"`
[INFO] running `"docker" "rm" "-f" "0ad419ded6a5d6630afde7b81727313d3d7a5ec1ad91631a32483e062d127d71"`
[INFO] [stdout] 0ad419ded6a5d6630afde7b81727313d3d7a5ec1ad91631a32483e062d127d71