[INFO] updating cached repository krankur/binary-search-tree-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/krankur/binary-search-tree-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/krankur/binary-search-tree-rs" "work/ex/clippy-test-run/sources/stable/gh/krankur/binary-search-tree-rs"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/krankur/binary-search-tree-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/krankur/binary-search-tree-rs" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/krankur/binary-search-tree-rs"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/krankur/binary-search-tree-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 604c64d36b87afb09d16383a9126659289ec111d
[INFO] sha for GitHub repo krankur/binary-search-tree-rs: 604c64d36b87afb09d16383a9126659289ec111d
[INFO] validating manifest of krankur/binary-search-tree-rs 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 krankur/binary-search-tree-rs 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 krankur/binary-search-tree-rs
[INFO] finished frobbing krankur/binary-search-tree-rs
[INFO] frobbed toml for krankur/binary-search-tree-rs written to work/ex/clippy-test-run/sources/stable/gh/krankur/binary-search-tree-rs/Cargo.toml
[INFO] started frobbing krankur/binary-search-tree-rs
[INFO] finished frobbing krankur/binary-search-tree-rs
[INFO] frobbed toml for krankur/binary-search-tree-rs written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/krankur/binary-search-tree-rs/Cargo.toml
[INFO] crate krankur/binary-search-tree-rs 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 krankur/binary-search-tree-rs against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/krankur/binary-search-tree-rs:/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] 7d5c857784668c241ee2d0bf922b9329ebc46378d229087c9b9b8983c0b56bb3
[INFO] running `"docker" "start" "-a" "7d5c857784668c241ee2d0bf922b9329ebc46378d229087c9b9b8983c0b56bb3"`
[INFO] [stderr]     Checking binary-search-tree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/main.rs:66:9
[INFO] [stderr]    |
[INFO] [stderr] 66 | /         match node.left {
[INFO] [stderr] 67 | |             Some(ref n) => {
[INFO] [stderr] 68 | |                 Tree::display_helper(n);
[INFO] [stderr] 69 | |                 println!("{}", n.weight);
[INFO] [stderr] ...  |
[INFO] [stderr] 72 | |             }
[INFO] [stderr] 73 | |         }
[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] 66 |         if let Some(ref n) = node.left {
[INFO] [stderr] 67 |     Tree::display_helper(n);
[INFO] [stderr] 68 |     println!("{}", n.weight);
[INFO] [stderr] 69 | }
[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/main.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 | /         match node.right {
[INFO] [stderr] 75 | |             Some(ref n) => {
[INFO] [stderr] 76 | |                 Tree::display_helper(n);
[INFO] [stderr] 77 | |                 println!("{}", n.weight);
[INFO] [stderr] ...  |
[INFO] [stderr] 80 | |             }
[INFO] [stderr] 81 | |         }
[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] 74 |         if let Some(ref n) = node.right {
[INFO] [stderr] 75 |     Tree::display_helper(n);
[INFO] [stderr] 76 |     println!("{}", n.weight);
[INFO] [stderr] 77 | }
[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/main.rs:66:9
[INFO] [stderr]    |
[INFO] [stderr] 66 | /         match node.left {
[INFO] [stderr] 67 | |             Some(ref n) => {
[INFO] [stderr] 68 | |                 Tree::display_helper(n);
[INFO] [stderr] 69 | |                 println!("{}", n.weight);
[INFO] [stderr] ...  |
[INFO] [stderr] 72 | |             }
[INFO] [stderr] 73 | |         }
[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] 66 |         if let Some(ref n) = node.left {
[INFO] [stderr] 67 |     Tree::display_helper(n);
[INFO] [stderr] 68 |     println!("{}", n.weight);
[INFO] [stderr] 69 | }
[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/main.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 | /         match node.right {
[INFO] [stderr] 75 | |             Some(ref n) => {
[INFO] [stderr] 76 | |                 Tree::display_helper(n);
[INFO] [stderr] 77 | |                 println!("{}", n.weight);
[INFO] [stderr] ...  |
[INFO] [stderr] 80 | |             }
[INFO] [stderr] 81 | |         }
[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] 74 |         if let Some(ref n) = node.right {
[INFO] [stderr] 75 |     Tree::display_helper(n);
[INFO] [stderr] 76 |     println!("{}", n.weight);
[INFO] [stderr] 77 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `"docker" "inspect" "7d5c857784668c241ee2d0bf922b9329ebc46378d229087c9b9b8983c0b56bb3"`
[INFO] running `"docker" "rm" "-f" "7d5c857784668c241ee2d0bf922b9329ebc46378d229087c9b9b8983c0b56bb3"`
[INFO] [stdout] 7d5c857784668c241ee2d0bf922b9329ebc46378d229087c9b9b8983c0b56bb3