[INFO] crate isomorphism 0.1.2 is already in cache
[INFO] extracting crate isomorphism 0.1.2 into work/ex/clippy-test-run/sources/stable/reg/isomorphism/0.1.2
[INFO] extracting crate isomorphism 0.1.2 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/isomorphism/0.1.2
[INFO] validating manifest of isomorphism-0.1.2 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 isomorphism-0.1.2 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 isomorphism-0.1.2
[INFO] finished frobbing isomorphism-0.1.2
[INFO] frobbed toml for isomorphism-0.1.2 written to work/ex/clippy-test-run/sources/stable/reg/isomorphism/0.1.2/Cargo.toml
[INFO] started frobbing isomorphism-0.1.2
[INFO] finished frobbing isomorphism-0.1.2
[INFO] frobbed toml for isomorphism-0.1.2 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/isomorphism/0.1.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 isomorphism-0.1.2 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/isomorphism/0.1.2:/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] d7dcdf034c189670281552c2e9308c3bfd1457402faa0e1d4a7f491633e3eb08
[INFO] running `"docker" "start" "-a" "d7dcdf034c189670281552c2e9308c3bfd1457402faa0e1d4a7f491633e3eb08"`
[INFO] [stderr]     Checking isomorphism v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/bitfield.rs:156:33
[INFO] [stderr]     |
[INFO] [stderr] 156 |                   .map(|x| 1 << x)
[INFO] [stderr]     |  _________________________________^
[INFO] [stderr] 157 | |                 .fold(0, |x, y| x + y)
[INFO] [stderr]     | |______________________________________^ help: try: `.sum()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unnecessary_fold)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]   --> tests/main.rs:86:29
[INFO] [stderr]    |
[INFO] [stderr] 86 |                 let old_b = map.get_left(&a).map(|&x| x);
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `map.get_left(&a).cloned()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]   --> tests/main.rs:87:29
[INFO] [stderr]    |
[INFO] [stderr] 87 |                 let old_a = map.get_right(&b).map(|&x| x);
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `map.get_right(&b).cloned()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.16s
[INFO] running `"docker" "inspect" "d7dcdf034c189670281552c2e9308c3bfd1457402faa0e1d4a7f491633e3eb08"`
[INFO] running `"docker" "rm" "-f" "d7dcdf034c189670281552c2e9308c3bfd1457402faa0e1d4a7f491633e3eb08"`
[INFO] [stdout] d7dcdf034c189670281552c2e9308c3bfd1457402faa0e1d4a7f491633e3eb08