[INFO] cloning repository https://github.com/u2/leetcode-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/u2/leetcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fu2%2Fleetcode-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fu2%2Fleetcode-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 23722bdf01b8f3a080af49de576ff52ccbc1c27a
[INFO] checking u2/leetcode-rust against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fu2%2Fleetcode-rust" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/u2/leetcode-rust on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/u2/leetcode-rust
[INFO] finished tweaking git repo https://github.com/u2/leetcode-rust
[INFO] tweaked toml for git repo https://github.com/u2/leetcode-rust written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/u2/leetcode-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded aho-corasick v0.6.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac51727d4744a6ef4b822f229774659c741e858c93f1e8e8385eee6b4b60efc0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ac51727d4744a6ef4b822f229774659c741e858c93f1e8e8385eee6b4b60efc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac51727d4744a6ef4b822f229774659c741e858c93f1e8e8385eee6b4b60efc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac51727d4744a6ef4b822f229774659c741e858c93f1e8e8385eee6b4b60efc0", kill_on_drop: false }`
[INFO] [stdout] ac51727d4744a6ef4b822f229774659c741e858c93f1e8e8385eee6b4b60efc0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7a38411eb1acf79639509dc1f2996d960fee7ab148333c7a023f7dab6e2d3ea
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a7a38411eb1acf79639509dc1f2996d960fee7ab148333c7a023f7dab6e2d3ea", kill_on_drop: false }`
[INFO] [stderr]     Checking aho-corasick v0.6.1
[INFO] [stderr]     Checking thread_local v0.3.2
[INFO] [stderr]     Checking regex v0.2.1
[INFO] [stderr]     Checking leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]  --> src/length_of_longest_substring.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let array: Vec<(char)> = s.char_indices().map(|i| i.1).collect::<Vec<_>>();
[INFO] [stdout]   |                    ^^^^^^ help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]  --> src/length_of_longest_substring.rs:8:25
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut c: VecDeque<(char)> = VecDeque::with_capacity(s.char_indices().count());
[INFO] [stdout]   |                         ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/length_of_longest_substring.rs:39:20
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let array: Vec<(char)> = s.char_indices().map(|i| i.1).collect::<Vec<_>>();
[INFO] [stdout]    |                    ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]  --> src/length_of_longest_substring.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let array: Vec<(char)> = s.char_indices().map(|i| i.1).collect::<Vec<_>>();
[INFO] [stdout]   |                    ^^^^^^ help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]  --> src/length_of_longest_substring.rs:8:25
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut c: VecDeque<(char)> = VecDeque::with_capacity(s.char_indices().count());
[INFO] [stdout]   |                         ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/length_of_longest_substring.rs:39:20
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let array: Vec<(char)> = s.char_indices().map(|i| i.1).collect::<Vec<_>>();
[INFO] [stdout]    |                    ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/find_median_sorted_arrays.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |             j - 1;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/find_median_sorted_arrays.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |             j - 1;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.02s
[INFO] running `Command { std: "docker" "inspect" "a7a38411eb1acf79639509dc1f2996d960fee7ab148333c7a023f7dab6e2d3ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7a38411eb1acf79639509dc1f2996d960fee7ab148333c7a023f7dab6e2d3ea", kill_on_drop: false }`
[INFO] [stdout] a7a38411eb1acf79639509dc1f2996d960fee7ab148333c7a023f7dab6e2d3ea