[INFO] crate daemon-engine 0.3.1 is already in cache
[INFO] extracting crate daemon-engine 0.3.1 into work/ex/clippy-test-run/sources/stable/reg/daemon-engine/0.3.1
[INFO] extracting crate daemon-engine 0.3.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/daemon-engine/0.3.1
[INFO] validating manifest of daemon-engine-0.3.1 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 daemon-engine-0.3.1 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 daemon-engine-0.3.1
[INFO] finished frobbing daemon-engine-0.3.1
[INFO] frobbed toml for daemon-engine-0.3.1 written to work/ex/clippy-test-run/sources/stable/reg/daemon-engine/0.3.1/Cargo.toml
[INFO] started frobbing daemon-engine-0.3.1
[INFO] finished frobbing daemon-engine-0.3.1
[INFO] frobbed toml for daemon-engine-0.3.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/daemon-engine/0.3.1/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 daemon-engine-0.3.1 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/reg/daemon-engine/0.3.1:/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] a9cc0dc91eae5630095d3e2054bef7fcf32a4bd1d8f8bb0468cd6206175c436a
[INFO] running `"docker" "start" "-a" "a9cc0dc91eae5630095d3e2054bef7fcf32a4bd1d8f8bb0468cd6206175c436a"`
[INFO] [stderr]     Checking users v0.7.0
[INFO] [stderr]     Checking tokio-serde v0.2.0
[INFO] [stderr]     Checking tokio-serde-json-mirror v0.1.0
[INFO] [stderr]     Checking daemon-engine v0.3.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/codecs/json.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |         return JsonError::Io(e);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `JsonError::Io(e)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/codecs/json.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |         return JsonError::Json(e);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `JsonError::Json(e)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/error.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |         return Error::IoError(e);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Error::IoError(e)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/codecs/json.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |         return JsonError::Io(e);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `JsonError::Io(e)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/codecs/json.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |         return JsonError::Json(e);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `JsonError::Json(e)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/error.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |         return Error::IoError(e);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Error::IoError(e)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]   --> src/server.rs:32:18
[INFO] [stderr]    |
[INFO] [stderr] 32 |     incoming_rx: Arc<Mutex<Option<UnboundedReceiver<Request<T, C, I>>>>>,
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::type_complexity)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/tcp.rs:178:37
[INFO] [stderr]     |
[INFO] [stderr] 178 |         let info = TcpInfo{address: address.clone()};
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^ help: try dereferencing it: `*address`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]   --> src/server.rs:32:18
[INFO] [stderr]    |
[INFO] [stderr] 32 |     incoming_rx: Arc<Mutex<Option<UnboundedReceiver<Request<T, C, I>>>>>,
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::type_complexity)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/connection.rs:156:16
[INFO] [stderr]     |
[INFO] [stderr] 156 |             if val.len() > 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!val.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: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/tcp.rs:178:37
[INFO] [stderr]     |
[INFO] [stderr] 178 |         let info = TcpInfo{address: address.clone()};
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^ help: try dereferencing it: `*address`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.23s
[INFO] running `"docker" "inspect" "a9cc0dc91eae5630095d3e2054bef7fcf32a4bd1d8f8bb0468cd6206175c436a"`
[INFO] running `"docker" "rm" "-f" "a9cc0dc91eae5630095d3e2054bef7fcf32a4bd1d8f8bb0468cd6206175c436a"`
[INFO] [stdout] a9cc0dc91eae5630095d3e2054bef7fcf32a4bd1d8f8bb0468cd6206175c436a