[INFO] updating cached repository openriceworks/rust_grep
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/openriceworks/rust_grep
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/openriceworks/rust_grep" "work/ex/clippy-test-run/sources/stable/gh/openriceworks/rust_grep"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/openriceworks/rust_grep'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/openriceworks/rust_grep" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/openriceworks/rust_grep"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/openriceworks/rust_grep'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 400dde6535de11c95f78930ad7d3e468e5ad35e0
[INFO] sha for GitHub repo openriceworks/rust_grep: 400dde6535de11c95f78930ad7d3e468e5ad35e0
[INFO] validating manifest of openriceworks/rust_grep 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 openriceworks/rust_grep 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 openriceworks/rust_grep
[INFO] finished frobbing openriceworks/rust_grep
[INFO] frobbed toml for openriceworks/rust_grep written to work/ex/clippy-test-run/sources/stable/gh/openriceworks/rust_grep/Cargo.toml
[INFO] started frobbing openriceworks/rust_grep
[INFO] finished frobbing openriceworks/rust_grep
[INFO] frobbed toml for openriceworks/rust_grep written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/openriceworks/rust_grep/Cargo.toml
[INFO] crate openriceworks/rust_grep 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 openriceworks/rust_grep 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-5/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/openriceworks/rust_grep:/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] 75f2d95c20310b0ab1f7f76a36a57077731fc743ac2aad95881f3b2ddda0d3c8
[INFO] running `"docker" "start" "-a" "75f2d95c20310b0ab1f7f76a36a57077731fc743ac2aad95881f3b2ddda0d3c8"`
[INFO] [stderr]     Checking getopts v0.2.18
[INFO] [stderr]     Checking grep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |             return None;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[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/main.rs:50:13
[INFO] [stderr]    |
[INFO] [stderr] 50 |             return Some("".to_string());
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some("".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: unneeded return statement
[INFO] [stderr]   --> src/main.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 |             return None;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[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/main.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |             return None;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[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/main.rs:50:13
[INFO] [stderr]    |
[INFO] [stderr] 50 |             return Some("".to_string());
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some("".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: unneeded return statement
[INFO] [stderr]   --> src/main.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 |             return None;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[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: this loop could be written as a `while let` loop
[INFO] [stderr]   --> src/main.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 | /     loop{
[INFO] [stderr] 22 | |         match pattern_match(pattern,&mut input_buffer){
[INFO] [stderr] 23 | |             Some(o) => print!("{}",o),
[INFO] [stderr] 24 | |             _ => break,
[INFO] [stderr] 25 | |         }
[INFO] [stderr] 26 | |     }
[INFO] [stderr]    | |_____^ help: try: `while let Some(o) = pattern_match(pattern,&mut input_buffer) { .. }`
[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: this loop could be written as a `while let` loop
[INFO] [stderr]   --> src/main.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | /     loop{
[INFO] [stderr] 32 | |         match pattern_match(pattern,&mut input_buffer){
[INFO] [stderr] 33 | |             Some(o) => print!("{}",o),
[INFO] [stderr] 34 | |             _ => break,
[INFO] [stderr] 35 | |         }
[INFO] [stderr] 36 | |     }
[INFO] [stderr]    | |_____^ help: try: `while let Some(o) = pattern_match(pattern,&mut input_buffer) { .. }`
[INFO] [stderr]    |
[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: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/main.rs:94:9
[INFO] [stderr]    |
[INFO] [stderr] 94 |         matches.free.get(1).clone()
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `matches.free.get(1)`
[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: this loop could be written as a `while let` loop
[INFO] [stderr]   --> src/main.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 | /     loop{
[INFO] [stderr] 22 | |         match pattern_match(pattern,&mut input_buffer){
[INFO] [stderr] 23 | |             Some(o) => print!("{}",o),
[INFO] [stderr] 24 | |             _ => break,
[INFO] [stderr] 25 | |         }
[INFO] [stderr] 26 | |     }
[INFO] [stderr]    | |_____^ help: try: `while let Some(o) = pattern_match(pattern,&mut input_buffer) { .. }`
[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: this loop could be written as a `while let` loop
[INFO] [stderr]   --> src/main.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | /     loop{
[INFO] [stderr] 32 | |         match pattern_match(pattern,&mut input_buffer){
[INFO] [stderr] 33 | |             Some(o) => print!("{}",o),
[INFO] [stderr] 34 | |             _ => break,
[INFO] [stderr] 35 | |         }
[INFO] [stderr] 36 | |     }
[INFO] [stderr]    | |_____^ help: try: `while let Some(o) = pattern_match(pattern,&mut input_buffer) { .. }`
[INFO] [stderr]    |
[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: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/main.rs:94:9
[INFO] [stderr]    |
[INFO] [stderr] 94 |         matches.free.get(1).clone()
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `matches.free.get(1)`
[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 1.12s
[INFO] running `"docker" "inspect" "75f2d95c20310b0ab1f7f76a36a57077731fc743ac2aad95881f3b2ddda0d3c8"`
[INFO] running `"docker" "rm" "-f" "75f2d95c20310b0ab1f7f76a36a57077731fc743ac2aad95881f3b2ddda0d3c8"`
[INFO] [stdout] 75f2d95c20310b0ab1f7f76a36a57077731fc743ac2aad95881f3b2ddda0d3c8