[INFO] updating cached repository daogangtang/learn-tokio
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/daogangtang/learn-tokio
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/daogangtang/learn-tokio" "work/ex/clippy-test-run/sources/stable/gh/daogangtang/learn-tokio"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/daogangtang/learn-tokio'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/daogangtang/learn-tokio" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/daogangtang/learn-tokio"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/daogangtang/learn-tokio'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 98b13be0e474ffb1b6a4f84b3e9caa91d100296a
[INFO] sha for GitHub repo daogangtang/learn-tokio: 98b13be0e474ffb1b6a4f84b3e9caa91d100296a
[INFO] validating manifest of daogangtang/learn-tokio 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 daogangtang/learn-tokio 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 daogangtang/learn-tokio
[INFO] finished frobbing daogangtang/learn-tokio
[INFO] frobbed toml for daogangtang/learn-tokio written to work/ex/clippy-test-run/sources/stable/gh/daogangtang/learn-tokio/Cargo.toml
[INFO] started frobbing daogangtang/learn-tokio
[INFO] finished frobbing daogangtang/learn-tokio
[INFO] frobbed toml for daogangtang/learn-tokio written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/daogangtang/learn-tokio/Cargo.toml
[INFO] crate daogangtang/learn-tokio 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 daogangtang/learn-tokio 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/gh/daogangtang/learn-tokio:/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] 2ebc9cc8a24693b2c67af1d7a293fda1ef20e8393fadb01caab791f8102e7e8d
[INFO] running `"docker" "start" "-a" "2ebc9cc8a24693b2c67af1d7a293fda1ef20e8393fadb01caab791f8102e7e8d"`
[INFO] [stderr]     Checking learn-tokio0 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/concurrent_send_recv.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         rx0: rx0,
[INFO] [stderr]    |         ^^^^^^^^ help: replace it with: `rx0`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/concurrent_send_recv2.rs:66:9
[INFO] [stderr]    |
[INFO] [stderr] 66 |         rx0: rx0,
[INFO] [stderr]    |         ^^^^^^^^ help: replace it with: `rx0`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/concurrent_send_recv2.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |         tx1: tx1
[INFO] [stderr]    |         ^^^^^^^^ help: replace it with: `tx1`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::io`
[INFO] [stderr]  --> src/tcp_server.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use tokio::io;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::prelude`
[INFO] [stderr]  --> src/tcp_server.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use tokio::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/tcp_server.rs:37:31
[INFO] [stderr]    |
[INFO] [stderr] 37 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
[INFO] [stderr]    |                               ^ help: consider using `_e` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/tcp_server.rs:20:10
[INFO] [stderr]    |
[INFO] [stderr] 20 |         .unwrap_or("127.0.0.1:8080".to_string());
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| "127.0.0.1:8080".to_string())`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/tcp_server3.rs:29:31
[INFO] [stderr]    |
[INFO] [stderr] 29 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
[INFO] [stderr]    |                               ^ help: consider using `_e` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]  --> src/tcp_server3.rs:9:10
[INFO] [stderr]   |
[INFO] [stderr] 9 |         .unwrap_or("127.0.0.1:8080".to_string());
[INFO] [stderr]   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| "127.0.0.1:8080".to_string())`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::try_ready`
[INFO] [stderr]  --> src/concurrent_send_recv.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use futures::try_ready;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/tcp_server3.rs:29:31
[INFO] [stderr]    |
[INFO] [stderr] 29 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
[INFO] [stderr]    |                               ^ help: consider using `_e` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]  --> src/tcp_server3.rs:9:10
[INFO] [stderr]   |
[INFO] [stderr] 9 |         .unwrap_or("127.0.0.1:8080".to_string());
[INFO] [stderr]   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| "127.0.0.1:8080".to_string())`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::try_ready`
[INFO] [stderr]  --> src/concurrent_send_recv2.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use futures::try_ready;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]   --> src/concurrent_send_recv2.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 | /         loop {
[INFO] [stderr] 27 | |             //let msg = try_ready!(self.rx0.poll().unwrap());
[INFO] [stderr] 28 | |             match self.rx0.poll().unwrap() {
[INFO] [stderr] 29 | |                 Async::Ready(Some(msg)) => {
[INFO] [stderr] ...  |
[INFO] [stderr] 35 | |
[INFO] [stderr] 36 | |         }
[INFO] [stderr]    | |_________^ help: try: `while let Async::Ready(Some(msg)) = self.rx0.poll().unwrap() { .. }`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::while_let_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/concurrent_send_recv2.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 | /             match rx1.poll().unwrap() {
[INFO] [stderr] 55 | |                 Async::Ready(Some(msg)) => {
[INFO] [stderr] 56 | |                     println!("<=== {:?}", msg);
[INFO] [stderr] 57 | |                 }
[INFO] [stderr] 58 | |                 _ => (),
[INFO] [stderr] 59 | |             }
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 54 |             if let Async::Ready(Some(msg)) = rx1.poll().unwrap() {
[INFO] [stderr] 55 |     println!("<=== {:?}", msg);
[INFO] [stderr] 56 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]   --> src/concurrent_send_recv.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 | /         loop {
[INFO] [stderr] 26 | |             //let msg = try_ready!(self.rx0.poll().unwrap());
[INFO] [stderr] 27 | |             match self.rx0.poll().unwrap() {
[INFO] [stderr] 28 | |                 Async::Ready(Some(msg)) => {
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |
[INFO] [stderr] 34 | |         }
[INFO] [stderr]    | |_________^ help: try: `while let Async::Ready(Some(msg)) = self.rx0.poll().unwrap() { .. }`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::while_let_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/concurrent_send_recv.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         rx0: rx0,
[INFO] [stderr]    |         ^^^^^^^^ help: replace it with: `rx0`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] error: redundant field names in struct initialization
[INFO] [stderr]   --> src/echo_udp.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |         socket: socket,
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: replace it with: `socket`
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/echo_udp.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 | #![deny(warnings)]
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    = note: #[deny(clippy::redundant_field_names)] implied by #[deny(warnings)]
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] error: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/print_each_packet.rs:72:35
[INFO] [stderr]    |
[INFO] [stderr] 72 |     let addr = env::args().nth(1).unwrap_or("127.0.0.1:8080".to_string());
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| "127.0.0.1:8080".to_string())`
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/print_each_packet.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 | #![deny(warnings)]
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    = note: #[deny(clippy::or_fun_call)] implied by #[deny(warnings)]
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `learn-tokio0`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/print_each_packet.rs:72:35
[INFO] [stderr]    |
[INFO] [stderr] 72 |     let addr = env::args().nth(1).unwrap_or("127.0.0.1:8080".to_string());
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| "127.0.0.1:8080".to_string())`
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/print_each_packet.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 | #![deny(warnings)]
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    = note: #[deny(clippy::or_fun_call)] implied by #[deny(warnings)]
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `learn-tokio0`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused import: `tokio::io`
[INFO] [stderr]  --> src/tcp_server.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use tokio::io;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::prelude`
[INFO] [stderr]  --> src/tcp_server.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use tokio::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/tcp_server.rs:37:31
[INFO] [stderr]    |
[INFO] [stderr] 37 |                     .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, "oh no!"))
[INFO] [stderr]    |                               ^ help: consider using `_e` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/tcp_server.rs:20:10
[INFO] [stderr]    |
[INFO] [stderr] 20 |         .unwrap_or("127.0.0.1:8080".to_string());
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| "127.0.0.1:8080".to_string())`
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `learn-tokio0`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/tcp_client.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |         a
[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/tcp_client.rs:18:17
[INFO] [stderr]    |
[INFO] [stderr] 18 |           let a = sink.send("hello, tokio\n".into())
[INFO] [stderr]    |  _________________^
[INFO] [stderr] 19 | |             .and_then(|a_sink|{
[INFO] [stderr] 20 | |                 let a_stream = stream.map(|msg|{
[INFO] [stderr] 21 | |                     println!("received msg: {:?}", msg);
[INFO] [stderr] ...  |
[INFO] [stderr] 24 | |                 a_sink.send_all(a_stream)
[INFO] [stderr] 25 | |             });
[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: unused variable: `stdout`
[INFO] [stderr]   --> src/tcp_client.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut stdout = io::stdout();
[INFO] [stderr]    |             ^^^^^^ help: consider using `_stdout` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/tcp_client.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut stdout = io::stdout();
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::try_ready`
[INFO] [stderr]  --> src/concurrent_send_recv.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use futures::try_ready;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]   --> src/concurrent_send_recv.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 | /         loop {
[INFO] [stderr] 26 | |             //let msg = try_ready!(self.rx0.poll().unwrap());
[INFO] [stderr] 27 | |             match self.rx0.poll().unwrap() {
[INFO] [stderr] 28 | |                 Async::Ready(Some(msg)) => {
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |
[INFO] [stderr] 34 | |         }
[INFO] [stderr]    | |_________^ help: try: `while let Async::Ready(Some(msg)) = self.rx0.poll().unwrap() { .. }`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::while_let_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "2ebc9cc8a24693b2c67af1d7a293fda1ef20e8393fadb01caab791f8102e7e8d"`
[INFO] running `"docker" "rm" "-f" "2ebc9cc8a24693b2c67af1d7a293fda1ef20e8393fadb01caab791f8102e7e8d"`
[INFO] [stdout] 2ebc9cc8a24693b2c67af1d7a293fda1ef20e8393fadb01caab791f8102e7e8d