[INFO] crate ur20-modbus 0.2.0 is already in cache
[INFO] extracting crate ur20-modbus 0.2.0 into work/ex/clippy-test-run/sources/stable/reg/ur20-modbus/0.2.0
[INFO] extracting crate ur20-modbus 0.2.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/ur20-modbus/0.2.0
[INFO] validating manifest of ur20-modbus-0.2.0 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 ur20-modbus-0.2.0 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 ur20-modbus-0.2.0
[INFO] finished frobbing ur20-modbus-0.2.0
[INFO] frobbed toml for ur20-modbus-0.2.0 written to work/ex/clippy-test-run/sources/stable/reg/ur20-modbus/0.2.0/Cargo.toml
[INFO] started frobbing ur20-modbus-0.2.0
[INFO] finished frobbing ur20-modbus-0.2.0
[INFO] frobbed toml for ur20-modbus-0.2.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/ur20-modbus/0.2.0/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 ur20-modbus-0.2.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-3/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/ur20-modbus/0.2.0:/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] bf920fb92fd21fa6e3b4810d2f40478b4dccc59ffc9a9b85c4f94ed36491997b
[INFO] running `"docker" "start" "-a" "bf920fb92fd21fa6e3b4810d2f40478b4dccc59ffc9a9b85c4f94ed36491997b"`
[INFO] [stderr]     Checking ur20 v0.5.0
[INFO] [stderr]     Checking tokio-modbus v0.2.3
[INFO] [stderr]     Checking ur20-modbus v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/lib.rs:126:9
[INFO] [stderr]     |
[INFO] [stderr] 126 |         coupler
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/lib.rs:55:23
[INFO] [stderr]     |
[INFO] [stderr] 55  |           let coupler = Client::connect_tcp(&addr, &handle)
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 56  | |             .and_then(|client| {
[INFO] [stderr] 57  | |                 let coupler_id = read_coupler_id(&client);
[INFO] [stderr] 58  | |                 let cnt = read_module_count(&client);
[INFO] [stderr] ...   |
[INFO] [stderr] 124 | |                 },
[INFO] [stderr] 125 | |             );
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/lib.rs:126:9
[INFO] [stderr]     |
[INFO] [stderr] 126 |         coupler
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/lib.rs:55:23
[INFO] [stderr]     |
[INFO] [stderr] 55  |           let coupler = Client::connect_tcp(&addr, &handle)
[INFO] [stderr]     |  _______________________^
[INFO] [stderr] 56  | |             .and_then(|client| {
[INFO] [stderr] 57  | |                 let coupler_id = read_coupler_id(&client);
[INFO] [stderr] 58  | |                 let cnt = read_module_count(&client);
[INFO] [stderr] ...   |
[INFO] [stderr] 124 | |                 },
[INFO] [stderr] 125 | |             );
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.25s
[INFO] running `"docker" "inspect" "bf920fb92fd21fa6e3b4810d2f40478b4dccc59ffc9a9b85c4f94ed36491997b"`
[INFO] running `"docker" "rm" "-f" "bf920fb92fd21fa6e3b4810d2f40478b4dccc59ffc9a9b85c4f94ed36491997b"`
[INFO] [stdout] bf920fb92fd21fa6e3b4810d2f40478b4dccc59ffc9a9b85c4f94ed36491997b