[INFO] updating cached repository waku-waku/rust-samples
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/waku-waku/rust-samples
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/waku-waku/rust-samples" "work/ex/clippy-test-run/sources/stable/gh/waku-waku/rust-samples"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/waku-waku/rust-samples'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/waku-waku/rust-samples" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/waku-waku/rust-samples"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/waku-waku/rust-samples'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ce06c702b94b5f8274bfac66e57d84538f10c6f8
[INFO] sha for GitHub repo waku-waku/rust-samples: ce06c702b94b5f8274bfac66e57d84538f10c6f8
[INFO] validating manifest of waku-waku/rust-samples 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 waku-waku/rust-samples 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 waku-waku/rust-samples
[INFO] finished frobbing waku-waku/rust-samples
[INFO] frobbed toml for waku-waku/rust-samples written to work/ex/clippy-test-run/sources/stable/gh/waku-waku/rust-samples/Cargo.toml
[INFO] started frobbing waku-waku/rust-samples
[INFO] finished frobbing waku-waku/rust-samples
[INFO] frobbed toml for waku-waku/rust-samples written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/waku-waku/rust-samples/Cargo.toml
[INFO] crate waku-waku/rust-samples 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 waku-waku/rust-samples 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/waku-waku/rust-samples:/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] f1fcda1bf8dc85318856bc5b3758644fe8ca37203c922423b55a5fd1d0f5fffe
[INFO] running `"docker" "start" "-a" "f1fcda1bf8dc85318856bc5b3758644fe8ca37203c922423b55a5fd1d0f5fffe"`
[INFO] [stderr]     Checking rust-samples v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: using `print!()` with a format string that ends in a single newline, consider using `println!()` instead
[INFO] [stderr]   --> src/make_rust_file.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 |        print!("\n");
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::print_with_newline)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/make_rust_file.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     return buf.split_whitespace().collect()
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `buf.split_whitespace().collect()`
[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/make_rust_file.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     return s.to_string();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `s.to_string()`
[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: value assigned to `src` is never read
[INFO] [stderr]   --> src/make_rust_file.rs:56:10
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let mut src = String::new();
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `string` is never read
[INFO] [stderr]   --> src/make_rust_file.rs:79:10
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let mut string = String::new();
[INFO] [stderr]    |             ^^^^^^
[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/make_rust_file.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 | /     match file.read_to_string(&mut s) {
[INFO] [stderr] 27 | |         Err(why) => panic!("couldn't read {}: {}", display,
[INFO] [stderr] 28 | |                                                    Error::description(&why)),
[INFO] [stderr] 29 | |         Ok(_) => (),
[INFO] [stderr] 30 | |     }
[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] 26 |     if let Err(why) = file.read_to_string(&mut s) { panic!("couldn't read {}: {}", display,
[INFO] [stderr] 27 |                                                    Error::description(&why)) }
[INFO] [stderr]    |
[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/make_rust_file.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 | /     match file.write_all(s.as_bytes()) {
[INFO] [stderr] 47 | |         Err(why) => {
[INFO] [stderr] 48 | |             panic!("couldn't write to {}: {}", display,
[INFO] [stderr] 49 | |                                                Error::description(&why))
[INFO] [stderr] 50 | |         },
[INFO] [stderr] 51 | |         Ok(_) => (),
[INFO] [stderr] 52 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[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] 46 |     if let Err(why) = file.write_all(s.as_bytes()) {
[INFO] [stderr] 47 |     panic!("couldn't write to {}: {}", display,
[INFO] [stderr] 48 |                                        Error::description(&why))
[INFO] [stderr] 49 | }
[INFO] [stderr]    |
[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/make_rust_file.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 | /     match file.write_all("".as_bytes()) {
[INFO] [stderr] 70 | |         Err(why) => {
[INFO] [stderr] 71 | |             panic!("couldn't write to {}: {}", display,
[INFO] [stderr] 72 | |                                                Error::description(&why))
[INFO] [stderr] 73 | |         },
[INFO] [stderr] 74 | |         Ok(_) => (),
[INFO] [stderr] 75 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[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] 69 |     if let Err(why) = file.write_all("".as_bytes()) {
[INFO] [stderr] 70 |     panic!("couldn't write to {}: {}", display,
[INFO] [stderr] 71 |                                        Error::description(&why))
[INFO] [stderr] 72 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: calling `as_bytes()` on a string literal
[INFO] [stderr]   --> src/make_rust_file.rs:69:26
[INFO] [stderr]    |
[INFO] [stderr] 69 |     match file.write_all("".as_bytes()) {
[INFO] [stderr]    |                          ^^^^^^^^^^^^^ help: consider using a byte string literal instead: `b""`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::string_lit_as_bytes)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#string_lit_as_bytes
[INFO] [stderr] 
[INFO] [stderr] warning: using `print!()` with a format string that ends in a single newline, consider using `println!()` instead
[INFO] [stderr]   --> src/make_rust_file.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 |        print!("\n");
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::print_with_newline)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/make_rust_file.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     return buf.split_whitespace().collect()
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `buf.split_whitespace().collect()`
[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/make_rust_file.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     return s.to_string();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `s.to_string()`
[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: value assigned to `src` is never read
[INFO] [stderr]   --> src/make_rust_file.rs:56:10
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let mut src = String::new();
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `string` is never read
[INFO] [stderr]   --> src/make_rust_file.rs:79:10
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let mut string = String::new();
[INFO] [stderr]    |             ^^^^^^
[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/make_rust_file.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 | /     match file.read_to_string(&mut s) {
[INFO] [stderr] 27 | |         Err(why) => panic!("couldn't read {}: {}", display,
[INFO] [stderr] 28 | |                                                    Error::description(&why)),
[INFO] [stderr] 29 | |         Ok(_) => (),
[INFO] [stderr] 30 | |     }
[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] 26 |     if let Err(why) = file.read_to_string(&mut s) { panic!("couldn't read {}: {}", display,
[INFO] [stderr] 27 |                                                    Error::description(&why)) }
[INFO] [stderr]    |
[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/make_rust_file.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 | /     match file.write_all(s.as_bytes()) {
[INFO] [stderr] 47 | |         Err(why) => {
[INFO] [stderr] 48 | |             panic!("couldn't write to {}: {}", display,
[INFO] [stderr] 49 | |                                                Error::description(&why))
[INFO] [stderr] 50 | |         },
[INFO] [stderr] 51 | |         Ok(_) => (),
[INFO] [stderr] 52 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[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] 46 |     if let Err(why) = file.write_all(s.as_bytes()) {
[INFO] [stderr] 47 |     panic!("couldn't write to {}: {}", display,
[INFO] [stderr] 48 |                                        Error::description(&why))
[INFO] [stderr] 49 | }
[INFO] [stderr]    |
[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/make_rust_file.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 | /     match file.write_all("".as_bytes()) {
[INFO] [stderr] 70 | |         Err(why) => {
[INFO] [stderr] 71 | |             panic!("couldn't write to {}: {}", display,
[INFO] [stderr] 72 | |                                                Error::description(&why))
[INFO] [stderr] 73 | |         },
[INFO] [stderr] 74 | |         Ok(_) => (),
[INFO] [stderr] 75 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[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] 69 |     if let Err(why) = file.write_all("".as_bytes()) {
[INFO] [stderr] 70 |     panic!("couldn't write to {}: {}", display,
[INFO] [stderr] 71 |                                        Error::description(&why))
[INFO] [stderr] 72 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: calling `as_bytes()` on a string literal
[INFO] [stderr]   --> src/make_rust_file.rs:69:26
[INFO] [stderr]    |
[INFO] [stderr] 69 |     match file.write_all("".as_bytes()) {
[INFO] [stderr]    |                          ^^^^^^^^^^^^^ help: consider using a byte string literal instead: `b""`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::string_lit_as_bytes)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#string_lit_as_bytes
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.33s
[INFO] running `"docker" "inspect" "f1fcda1bf8dc85318856bc5b3758644fe8ca37203c922423b55a5fd1d0f5fffe"`
[INFO] running `"docker" "rm" "-f" "f1fcda1bf8dc85318856bc5b3758644fe8ca37203c922423b55a5fd1d0f5fffe"`
[INFO] [stdout] f1fcda1bf8dc85318856bc5b3758644fe8ca37203c922423b55a5fd1d0f5fffe