[INFO] updating cached repository aleozlx/alg-matching
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/aleozlx/alg-matching
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/aleozlx/alg-matching" "work/ex/clippy-test-run/sources/stable/gh/aleozlx/alg-matching"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/aleozlx/alg-matching'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/aleozlx/alg-matching" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/aleozlx/alg-matching"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/aleozlx/alg-matching'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f7b8757bdcb242b5e3a9841bf6085ae47be32091
[INFO] sha for GitHub repo aleozlx/alg-matching: f7b8757bdcb242b5e3a9841bf6085ae47be32091
[INFO] validating manifest of aleozlx/alg-matching 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 aleozlx/alg-matching 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 aleozlx/alg-matching
[INFO] finished frobbing aleozlx/alg-matching
[INFO] frobbed toml for aleozlx/alg-matching written to work/ex/clippy-test-run/sources/stable/gh/aleozlx/alg-matching/Cargo.toml
[INFO] started frobbing aleozlx/alg-matching
[INFO] finished frobbing aleozlx/alg-matching
[INFO] frobbed toml for aleozlx/alg-matching written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/aleozlx/alg-matching/Cargo.toml
[INFO] crate aleozlx/alg-matching 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 aleozlx/alg-matching against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/aleozlx/alg-matching:/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] 7e0a385e7a71f3ec2ff27366499b0f92e4bb0dac1d83169743988a5eb2d2782d
[INFO] running `"docker" "start" "-a" "7e0a385e7a71f3ec2ff27366499b0f92e4bb0dac1d83169743988a5eb2d2782d"`
[INFO] [stderr]     Checking alg-matching v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/main.rs:70:1
[INFO] [stderr]    |
[INFO] [stderr] 70 | / macro_rules! unweighted_graph(
[INFO] [stderr] 71 | |     { $($u:expr => [ $($v:expr),+ ]),+ } => {
[INFO] [stderr] 72 | |         {
[INFO] [stderr] 73 | |             let mut g = AdjGraph { adj: HashMap::new() };
[INFO] [stderr] ...  |
[INFO] [stderr] 79 | |     };
[INFO] [stderr] 80 | | );
[INFO] [stderr]    | |__^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_macros)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:89:9
[INFO] [stderr]    |
[INFO] [stderr] 89 |         return self.cap;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.cap`
[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:93:9
[INFO] [stderr]    |
[INFO] [stderr] 93 |         return self.flow;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.flow`
[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:107:9
[INFO] [stderr]     |
[INFO] [stderr] 107 |         return &self.g;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^ help: remove `return` as shown: `&self.g`
[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: unused variable: `f`
[INFO] [stderr]    --> src/main.rs:186:9
[INFO] [stderr]     |
[INFO] [stderr] 186 |     let f: AdjFlowI32<i32, FlowEdgeI32> = AdjFlowI32{ g: AdjGraph::new() };
[INFO] [stderr]     |         ^ help: consider using `_f` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]    --> src/main.rs:116:13
[INFO] [stderr]     |
[INFO] [stderr] 116 |         let res = self.residual_graph();
[INFO] [stderr]     |             ^^^ help: consider using `_res` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/main.rs:115:43
[INFO] [stderr]     |
[INFO] [stderr] 115 |     fn edmonds_karp_maxflow<'g>(&'g self, s: &'g V, t: &'g V) -> Self {
[INFO] [stderr]     |                                           ^ help: consider using `_s` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]    --> src/main.rs:115:53
[INFO] [stderr]     |
[INFO] [stderr] 115 |     fn edmonds_karp_maxflow<'g>(&'g self, s: &'g V, t: &'g V) -> Self {
[INFO] [stderr]     |                                                     ^ help: consider using `_t` instead
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/main.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     fn inner_graph<'g>(&'g self) -> &'g Graph<V, E>;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/main.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 | /     fn inner_graph<'g>(&'g self) -> &'g Graph<V, E> {
[INFO] [stderr] 107 | |         return &self.g;
[INFO] [stderr] 108 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:89:9
[INFO] [stderr]    |
[INFO] [stderr] 89 |         return self.cap;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.cap`
[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:93:9
[INFO] [stderr]    |
[INFO] [stderr] 93 |         return self.flow;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.flow`
[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:107:9
[INFO] [stderr]     |
[INFO] [stderr] 107 |         return &self.g;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^ help: remove `return` as shown: `&self.g`
[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: unused variable: `f`
[INFO] [stderr]    --> src/main.rs:186:9
[INFO] [stderr]     |
[INFO] [stderr] 186 |     let f: AdjFlowI32<i32, FlowEdgeI32> = AdjFlowI32{ g: AdjGraph::new() };
[INFO] [stderr]     |         ^ help: consider using `_f` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]    --> src/main.rs:116:13
[INFO] [stderr]     |
[INFO] [stderr] 116 |         let res = self.residual_graph();
[INFO] [stderr]     |             ^^^ help: consider using `_res` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/main.rs:115:43
[INFO] [stderr]     |
[INFO] [stderr] 115 |     fn edmonds_karp_maxflow<'g>(&'g self, s: &'g V, t: &'g V) -> Self {
[INFO] [stderr]     |                                           ^ help: consider using `_s` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]    --> src/main.rs:115:53
[INFO] [stderr]     |
[INFO] [stderr] 115 |     fn edmonds_karp_maxflow<'g>(&'g self, s: &'g V, t: &'g V) -> Self {
[INFO] [stderr]     |                                                     ^ help: consider using `_t` instead
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/main.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     fn inner_graph<'g>(&'g self) -> &'g Graph<V, E>;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/main.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 | /     fn inner_graph<'g>(&'g self) -> &'g Graph<V, E> {
[INFO] [stderr] 107 | |         return &self.g;
[INFO] [stderr] 108 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.34s
[INFO] running `"docker" "inspect" "7e0a385e7a71f3ec2ff27366499b0f92e4bb0dac1d83169743988a5eb2d2782d"`
[INFO] running `"docker" "rm" "-f" "7e0a385e7a71f3ec2ff27366499b0f92e4bb0dac1d83169743988a5eb2d2782d"`
[INFO] [stdout] 7e0a385e7a71f3ec2ff27366499b0f92e4bb0dac1d83169743988a5eb2d2782d