[INFO] updating cached repository maretekent/simplewebserver
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/maretekent/simplewebserver
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/maretekent/simplewebserver" "work/ex/clippy-test-run/sources/stable/gh/maretekent/simplewebserver"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/maretekent/simplewebserver'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/maretekent/simplewebserver" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/maretekent/simplewebserver"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/maretekent/simplewebserver'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ac3a694c5332a668606302bd378962b6add7bfa7
[INFO] sha for GitHub repo maretekent/simplewebserver: ac3a694c5332a668606302bd378962b6add7bfa7
[INFO] validating manifest of maretekent/simplewebserver 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 maretekent/simplewebserver 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 maretekent/simplewebserver
[INFO] finished frobbing maretekent/simplewebserver
[INFO] frobbed toml for maretekent/simplewebserver written to work/ex/clippy-test-run/sources/stable/gh/maretekent/simplewebserver/Cargo.toml
[INFO] started frobbing maretekent/simplewebserver
[INFO] finished frobbing maretekent/simplewebserver
[INFO] frobbed toml for maretekent/simplewebserver written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/maretekent/simplewebserver/Cargo.toml
[INFO] crate maretekent/simplewebserver 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 maretekent/simplewebserver against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/maretekent/simplewebserver:/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 -Dclippy::into_iter_on_array" "-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] ede2cefb44467fafd16b55df33b736c322bb0cafe2b8f95b7a9800eba82f545e
[INFO] running `"docker" "start" "-a" "ede2cefb44467fafd16b55df33b736c322bb0cafe2b8f95b7a9800eba82f545e"`
[INFO] [stderr]     Checking simpleserver v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/lib.rs:83:20
[INFO] [stderr]    |
[INFO] [stderr] 83 |               if let Err(_) =  self.tx.send(Message::Terminate) {
[INFO] [stderr]    |  _____________-      ^^^^^^
[INFO] [stderr] 84 | |                 println!("Failed to send Termination message");
[INFO] [stderr] 85 | |             }
[INFO] [stderr]    | |_____________- help: try this: `if self.tx.send(Message::Terminate).is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/lib.rs:91:24
[INFO] [stderr]    |
[INFO] [stderr] 91 |                   if let Err(_) = join_result {
[INFO] [stderr]    |  _________________-      ^^^^^^
[INFO] [stderr] 92 | |                     println!("Failed to join thread, #{}", worker.id);
[INFO] [stderr] 93 | |                 }
[INFO] [stderr]    | |_________________- help: try this: `if join_result.is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/lib.rs:83:20
[INFO] [stderr]    |
[INFO] [stderr] 83 |               if let Err(_) =  self.tx.send(Message::Terminate) {
[INFO] [stderr]    |  _____________-      ^^^^^^
[INFO] [stderr] 84 | |                 println!("Failed to send Termination message");
[INFO] [stderr] 85 | |             }
[INFO] [stderr]    | |_____________- help: try this: `if self.tx.send(Message::Terminate).is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/lib.rs:91:24
[INFO] [stderr]    |
[INFO] [stderr] 91 |                   if let Err(_) = join_result {
[INFO] [stderr]    |  _________________-      ^^^^^^
[INFO] [stderr] 92 | |                     println!("Failed to join thread, #{}", worker.id);
[INFO] [stderr] 93 | |                 }
[INFO] [stderr]    | |_________________- help: try this: `if join_result.is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/bin/simpleserver.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     if let Err(_) = stream.read(&mut buf) { println!("Failed to read stream."); }
[INFO] [stderr]    |     -------^^^^^^---------------------------------------------------------------- help: try this: `if stream.read(&mut buf).is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/bin/simpleserver.rs:32:16
[INFO] [stderr]    |
[INFO] [stderr] 32 |           if let Err(_) = tx.send(ServerMessage::ShutDown) {
[INFO] [stderr]    |  _________-      ^^^^^^
[INFO] [stderr] 33 | |             println!("Failed to send shutdown message.");
[INFO] [stderr] 34 | |         }
[INFO] [stderr]    | |_________- help: try this: `if tx.send(ServerMessage::ShutDown).is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/bin/simpleserver.rs:41:16
[INFO] [stderr]    |
[INFO] [stderr] 41 |           if let Err(_) = file.read_to_string(&mut contents) {
[INFO] [stderr]    |  _________-      ^^^^^^
[INFO] [stderr] 42 | |             println!("Failed to read file");
[INFO] [stderr] 43 | |         }
[INFO] [stderr]    | |_________- help: try this: `if file.read_to_string(&mut contents).is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/bin/simpleserver.rs:48:12
[INFO] [stderr]    |
[INFO] [stderr] 48 |       if let Err(_) = stream.write(response.as_bytes()) {
[INFO] [stderr]    |  _____-      ^^^^^^
[INFO] [stderr] 49 | |         println!("Failed to write response to stream: {}", response);
[INFO] [stderr] 50 | |     }
[INFO] [stderr]    | |_____- help: try this: `if stream.write(response.as_bytes()).is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/bin/simpleserver.rs:51:12
[INFO] [stderr]    |
[INFO] [stderr] 51 |       if let Err(_) = stream.flush() {
[INFO] [stderr]    |  _____-      ^^^^^^
[INFO] [stderr] 52 | |         println!("Failed to flush stream.");
[INFO] [stderr] 53 | |     }
[INFO] [stderr]    | |_____- help: try this: `if stream.flush().is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/bin/simpleserver.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     if let Err(_) = stream.read(&mut buf) { println!("Failed to read stream."); }
[INFO] [stderr]    |     -------^^^^^^---------------------------------------------------------------- help: try this: `if stream.read(&mut buf).is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/bin/simpleserver.rs:32:16
[INFO] [stderr]    |
[INFO] [stderr] 32 |           if let Err(_) = tx.send(ServerMessage::ShutDown) {
[INFO] [stderr]    |  _________-      ^^^^^^
[INFO] [stderr] 33 | |             println!("Failed to send shutdown message.");
[INFO] [stderr] 34 | |         }
[INFO] [stderr]    | |_________- help: try this: `if tx.send(ServerMessage::ShutDown).is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/bin/simpleserver.rs:41:16
[INFO] [stderr]    |
[INFO] [stderr] 41 |           if let Err(_) = file.read_to_string(&mut contents) {
[INFO] [stderr]    |  _________-      ^^^^^^
[INFO] [stderr] 42 | |             println!("Failed to read file");
[INFO] [stderr] 43 | |         }
[INFO] [stderr]    | |_________- help: try this: `if file.read_to_string(&mut contents).is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/bin/simpleserver.rs:48:12
[INFO] [stderr]    |
[INFO] [stderr] 48 |       if let Err(_) = stream.write(response.as_bytes()) {
[INFO] [stderr]    |  _____-      ^^^^^^
[INFO] [stderr] 49 | |         println!("Failed to write response to stream: {}", response);
[INFO] [stderr] 50 | |     }
[INFO] [stderr]    | |_____- help: try this: `if stream.write(response.as_bytes()).is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]   --> src/bin/simpleserver.rs:51:12
[INFO] [stderr]    |
[INFO] [stderr] 51 |       if let Err(_) = stream.flush() {
[INFO] [stderr]    |  _____-      ^^^^^^
[INFO] [stderr] 52 | |         println!("Failed to flush stream.");
[INFO] [stderr] 53 | |     }
[INFO] [stderr]    | |_____- help: try this: `if stream.flush().is_err()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.29s
[INFO] running `"docker" "inspect" "ede2cefb44467fafd16b55df33b736c322bb0cafe2b8f95b7a9800eba82f545e"`
[INFO] running `"docker" "rm" "-f" "ede2cefb44467fafd16b55df33b736c322bb0cafe2b8f95b7a9800eba82f545e"`
[INFO] [stdout] ede2cefb44467fafd16b55df33b736c322bb0cafe2b8f95b7a9800eba82f545e