[INFO] updating cached repository khuey/rustc-1.18-regression
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/khuey/rustc-1.18-regression
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/khuey/rustc-1.18-regression" "work/ex/clippy-test-run/sources/stable/gh/khuey/rustc-1.18-regression"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/khuey/rustc-1.18-regression'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/khuey/rustc-1.18-regression" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/khuey/rustc-1.18-regression"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/khuey/rustc-1.18-regression'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 358a3adb46ac9859d5083e4a7bdccbbfc32d7deb
[INFO] sha for GitHub repo khuey/rustc-1.18-regression: 358a3adb46ac9859d5083e4a7bdccbbfc32d7deb
[INFO] validating manifest of khuey/rustc-1.18-regression 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 khuey/rustc-1.18-regression 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 khuey/rustc-1.18-regression
[INFO] finished frobbing khuey/rustc-1.18-regression
[INFO] frobbed toml for khuey/rustc-1.18-regression written to work/ex/clippy-test-run/sources/stable/gh/khuey/rustc-1.18-regression/Cargo.toml
[INFO] started frobbing khuey/rustc-1.18-regression
[INFO] finished frobbing khuey/rustc-1.18-regression
[INFO] frobbed toml for khuey/rustc-1.18-regression written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/khuey/rustc-1.18-regression/Cargo.toml
[INFO] crate khuey/rustc-1.18-regression 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 khuey/rustc-1.18-regression 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-3/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/khuey/rustc-1.18-regression:/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] 7136a0994b4888e3b096f7df1e6bac66824cbf797aea98538e22c64e4b351d22
[INFO] running `"docker" "start" "-a" "7136a0994b4888e3b096f7df1e6bac66824cbf797aea98538e22c64e4b351d22"`
[INFO] [stderr]     Checking regression v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]  --> src/lib.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn main() {
[INFO] [stderr]   | ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: this `.filter_map` can be written more simply using `.map`
[INFO] [stderr]   --> src/lib.rs:17:48
[INFO] [stderr]    |
[INFO] [stderr] 17 |                                 iter::<_, _, ()>(vec1.iter()
[INFO] [stderr]    |  ________________________________________________^
[INFO] [stderr] 18 | |                                                .filter_map(move |_| {
[INFO] [stderr] 19 | |                                                    Some(Ok(ok::<_, ()>(5)))
[INFO] [stderr] 20 | |                                                }))
[INFO] [stderr]    | |_________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unnecessary_filter_map)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_filter_map
[INFO] [stderr] 
[INFO] [stderr] warning: this `.filter_map` can be written more simply using `.map`
[INFO] [stderr]   --> src/lib.rs:17:48
[INFO] [stderr]    |
[INFO] [stderr] 17 |                                 iter::<_, _, ()>(vec1.iter()
[INFO] [stderr]    |  ________________________________________________^
[INFO] [stderr] 18 | |                                                .filter_map(move |_| {
[INFO] [stderr] 19 | |                                                    Some(Ok(ok::<_, ()>(5)))
[INFO] [stderr] 20 | |                                                }))
[INFO] [stderr]    | |_________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unnecessary_filter_map)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_filter_map
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `"docker" "inspect" "7136a0994b4888e3b096f7df1e6bac66824cbf797aea98538e22c64e4b351d22"`
[INFO] running `"docker" "rm" "-f" "7136a0994b4888e3b096f7df1e6bac66824cbf797aea98538e22c64e4b351d22"`
[INFO] [stdout] 7136a0994b4888e3b096f7df1e6bac66824cbf797aea98538e22c64e4b351d22