[INFO] crate carboxyl 0.2.1 is already in cache
[INFO] extracting crate carboxyl 0.2.1 into work/ex/clippy-test-run/sources/stable/reg/carboxyl/0.2.1
[INFO] extracting crate carboxyl 0.2.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/carboxyl/0.2.1
[INFO] validating manifest of carboxyl-0.2.1 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 carboxyl-0.2.1 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 carboxyl-0.2.1
[INFO] finished frobbing carboxyl-0.2.1
[INFO] frobbed toml for carboxyl-0.2.1 written to work/ex/clippy-test-run/sources/stable/reg/carboxyl/0.2.1/Cargo.toml
[INFO] started frobbing carboxyl-0.2.1
[INFO] finished frobbing carboxyl-0.2.1
[INFO] frobbed toml for carboxyl-0.2.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/carboxyl/0.2.1/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 carboxyl-0.2.1 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/carboxyl/0.2.1:/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] 8ab5ae05640d0750fe600de6b35393310d1d6d16d1d2844caccefca97a947370
[INFO] running `"docker" "start" "-a" "8ab5ae05640d0750fe600de6b35393310d1d6d16d1d2844caccefca97a947370"`
[INFO] [stderr]    Compiling getopts v0.2.18
[INFO] [stderr]     Checking pulldown-cmark v0.0.3
[INFO] [stderr]     Checking skeptic v0.6.1
[INFO] [stderr]    Compiling carboxyl v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]    --> src/signal.rs:396:21
[INFO] [stderr]     |
[INFO] [stderr] 396 |         const ERR: &'static str = "sampled on forward-declaration of signal";
[INFO] [stderr]     |                    -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/signal.rs:413:25
[INFO] [stderr]     |
[INFO] [stderr] 413 |                         ret
[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/signal.rs:412:35
[INFO] [stderr]     |
[INFO] [stderr] 412 |                         let ret = strong.read().unwrap().call();
[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: you should consider adding a `Default` implementation for `stream::Sink<A>`
[INFO] [stderr]   --> src/stream/mod.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 | /     pub fn new() -> Sink<A> {
[INFO] [stderr] 78 | |         Sink { source: Arc::new(RwLock::new(Source::new())) }
[INFO] [stderr] 79 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 75 | impl Default for stream::Sink<A> {
[INFO] [stderr] 76 |     fn default() -> Self {
[INFO] [stderr] 77 |         Self::new()
[INFO] [stderr] 78 |     }
[INFO] [stderr] 79 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> benches/simple.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `carboxyl`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> benches/first_order.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `carboxyl`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/stream/mod.rs:604:28
[INFO] [stderr]     |
[INFO] [stderr] 604 |         sink.feed_async(0..100000);
[INFO] [stderr]     |                            ^^^^^^ help: consider: `100_000`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]    --> src/signal.rs:396:21
[INFO] [stderr]     |
[INFO] [stderr] 396 |         const ERR: &'static str = "sampled on forward-declaration of signal";
[INFO] [stderr]     |                    -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/signal.rs:413:25
[INFO] [stderr]     |
[INFO] [stderr] 413 |                         ret
[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/signal.rs:412:35
[INFO] [stderr]     |
[INFO] [stderr] 412 |                         let ret = strong.read().unwrap().call();
[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] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> benches/second_order.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `carboxyl`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> /opt/crater/target/debug/build/carboxyl-436470eb1c298eba/out/skeptic-tests.rs:3:9
[INFO] [stderr]    |
[INFO] [stderr] 3  |       let ref s = format!("{}", r####"extern crate carboxyl;
[INFO] [stderr]    |  _____-   ^^^^^
[INFO] [stderr] 4  | |
[INFO] [stderr] 5  | | fn main() {
[INFO] [stderr] 6  | |     let sink = carboxyl::Sink::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 16 | | }
[INFO] [stderr] 17 | | "####);
[INFO] [stderr]    | |_______- help: try: `let s = &$ crate :: fmt :: format ( format_args ! ( $ ( $ arg ) * ) );`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> /opt/crater/target/debug/build/carboxyl-436470eb1c298eba/out/skeptic-tests.rs:3:17
[INFO] [stderr]    |
[INFO] [stderr] 3  |       let ref s = format!("{}", r####"extern crate carboxyl;
[INFO] [stderr]    |  _________________^
[INFO] [stderr] 4  | |
[INFO] [stderr] 5  | | fn main() {
[INFO] [stderr] 6  | |     let sink = carboxyl::Sink::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 16 | | }
[INFO] [stderr] 17 | | "####);
[INFO] [stderr]    | |______^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] help: consider using .to_string()
[INFO] [stderr]    |
[INFO] [stderr] 2  | $ crate :: fmt :: format ( r####"extern crate carboxyl;
[INFO] [stderr] 3  | 
[INFO] [stderr] 4  | fn main() {
[INFO] [stderr] 5  |     let sink = carboxyl::Sink::new();
[INFO] [stderr] 6  |     let stream = sink.stream();
[INFO] [stderr] 7  |     let signal = stream.hold(3);
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> /opt/crater/target/debug/build/carboxyl-436470eb1c298eba/out/skeptic-tests.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |       let ref s = format!("{}", r####"extern crate carboxyl;
[INFO] [stderr]    |  _____-   ^^^^^
[INFO] [stderr] 23 | |
[INFO] [stderr] 24 | | fn main() {
[INFO] [stderr] 25 | |     let sink = carboxyl::Sink::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 31 | | }
[INFO] [stderr] 32 | | "####);
[INFO] [stderr]    | |_______- help: try: `let s = &$ crate :: fmt :: format ( format_args ! ( $ ( $ arg ) * ) );`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> /opt/crater/target/debug/build/carboxyl-436470eb1c298eba/out/skeptic-tests.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 |       let ref s = format!("{}", r####"extern crate carboxyl;
[INFO] [stderr]    |  _________________^
[INFO] [stderr] 23 | |
[INFO] [stderr] 24 | | fn main() {
[INFO] [stderr] 25 | |     let sink = carboxyl::Sink::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 31 | | }
[INFO] [stderr] 32 | | "####);
[INFO] [stderr]    | |______^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] help: consider using .to_string()
[INFO] [stderr]    |
[INFO] [stderr] 2  | $ crate :: fmt :: format ( r####"extern crate carboxyl;
[INFO] [stderr] 3  | 
[INFO] [stderr] 4  | fn main() {
[INFO] [stderr] 5  |     let sink = carboxyl::Sink::new();
[INFO] [stderr] 6  |     let stream = sink.stream();
[INFO] [stderr] 7  | 
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> /opt/crater/target/debug/build/carboxyl-436470eb1c298eba/out/skeptic-tests.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |       let ref s = format!("{}", r####"extern crate carboxyl;
[INFO] [stderr]    |  _____-   ^^^^^
[INFO] [stderr] 38 | |
[INFO] [stderr] 39 | | fn main() {
[INFO] [stderr] 40 | |     let sink = carboxyl::Sink::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 46 | | }
[INFO] [stderr] 47 | | "####);
[INFO] [stderr]    | |_______- help: try: `let s = &$ crate :: fmt :: format ( format_args ! ( $ ( $ arg ) * ) );`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> /opt/crater/target/debug/build/carboxyl-436470eb1c298eba/out/skeptic-tests.rs:37:17
[INFO] [stderr]    |
[INFO] [stderr] 37 |       let ref s = format!("{}", r####"extern crate carboxyl;
[INFO] [stderr]    |  _________________^
[INFO] [stderr] 38 | |
[INFO] [stderr] 39 | | fn main() {
[INFO] [stderr] 40 | |     let sink = carboxyl::Sink::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 46 | | }
[INFO] [stderr] 47 | | "####);
[INFO] [stderr]    | |______^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] help: consider using .to_string()
[INFO] [stderr]    |
[INFO] [stderr] 2  | $ crate :: fmt :: format ( r####"extern crate carboxyl;
[INFO] [stderr] 3  | 
[INFO] [stderr] 4  | fn main() {
[INFO] [stderr] 5  |     let sink = carboxyl::Sink::new();
[INFO] [stderr] 6  |     let stream = sink.stream();
[INFO] [stderr] 7  | 
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> /opt/crater/target/debug/build/carboxyl-436470eb1c298eba/out/skeptic-tests.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |       let ref s = format!("{}", r####"extern crate carboxyl;
[INFO] [stderr]    |  _____-   ^^^^^
[INFO] [stderr] 53 | |
[INFO] [stderr] 54 | | fn main() {
[INFO] [stderr] 55 | |     let sink = carboxyl::Sink::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 67 | | }
[INFO] [stderr] 68 | | "####);
[INFO] [stderr]    | |_______- help: try: `let s = &$ crate :: fmt :: format ( format_args ! ( $ ( $ arg ) * ) );`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> /opt/crater/target/debug/build/carboxyl-436470eb1c298eba/out/skeptic-tests.rs:52:17
[INFO] [stderr]    |
[INFO] [stderr] 52 |       let ref s = format!("{}", r####"extern crate carboxyl;
[INFO] [stderr]    |  _________________^
[INFO] [stderr] 53 | |
[INFO] [stderr] 54 | | fn main() {
[INFO] [stderr] 55 | |     let sink = carboxyl::Sink::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 67 | | }
[INFO] [stderr] 68 | | "####);
[INFO] [stderr]    | |______^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] help: consider using .to_string()
[INFO] [stderr]    |
[INFO] [stderr] 2  | $ crate :: fmt :: format ( r####"extern crate carboxyl;
[INFO] [stderr] 3  | 
[INFO] [stderr] 4  | fn main() {
[INFO] [stderr] 5  |     let sink = carboxyl::Sink::new();
[INFO] [stderr] 6  |     let stream = sink.stream();
[INFO] [stderr] 7  | 
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
[INFO] [stderr]    --> src/transaction.rs:179:31
[INFO] [stderr]     |
[INFO] [stderr] 179 |         for guard in guards { guard.join().ok().expect("thread failed"); }
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::ok_expect)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ok_expect
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `stream::Sink<A>`
[INFO] [stderr]   --> src/stream/mod.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 | /     pub fn new() -> Sink<A> {
[INFO] [stderr] 78 | |         Sink { source: Arc::new(RwLock::new(Source::new())) }
[INFO] [stderr] 79 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 75 | impl Default for stream::Sink<A> {
[INFO] [stderr] 76 |     fn default() -> Self {
[INFO] [stderr] 77 |         Self::new()
[INFO] [stderr] 78 |     }
[INFO] [stderr] 79 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to i64 may become silently lossy if types change
[INFO] [stderr]    --> src/stream/mod.rs:711:35
[INFO] [stderr]     |
[INFO] [stderr] 711 |             fn f(n: i32) -> i64 { (n + 3) as i64 }
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^ help: try: `i64::from(n + 3)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]    --> src/signal.rs:365:21
[INFO] [stderr]     |
[INFO] [stderr] 365 |             let n = Mutex::new(0);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::mutex_atomic)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]    --> src/signal.rs:367:29
[INFO] [stderr]     |
[INFO] [stderr] 367 |                 let mut n = n.lock().unwrap();
[INFO] [stderr]     |                             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic
[INFO] [stderr] 
[INFO] [stderr] warning: needlessly taken reference of both operands
[INFO] [stderr]   --> src/testing.rs:45:20
[INFO] [stderr]    |
[INFO] [stderr] 45 |                 if &a == &b { Ok(()) }
[INFO] [stderr]    |                    ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::op_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] help: use the values directly
[INFO] [stderr]    |
[INFO] [stderr] 45 |                 if a == b { Ok(()) }
[INFO] [stderr]    |                    ^    ^
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8ab5ae05640d0750fe600de6b35393310d1d6d16d1d2844caccefca97a947370"`
[INFO] running `"docker" "rm" "-f" "8ab5ae05640d0750fe600de6b35393310d1d6d16d1d2844caccefca97a947370"`
[INFO] [stdout] 8ab5ae05640d0750fe600de6b35393310d1d6d16d1d2844caccefca97a947370