[INFO] cloning repository https://github.com/Tiiita/leet-code-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Tiiita/leet-code-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTiiita%2Fleet-code-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTiiita%2Fleet-code-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bcbc92ce3981a96660e6e5d63bc73a140b856c14
[INFO] checking Tiiita/leet-code-rs against try#2c4e58eac5a232e49065e517c1cf50b2715ccf85 for pr-140283
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTiiita%2Fleet-code-rs" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Tiiita/leet-code-rs
[INFO] finished tweaking git repo https://github.com/Tiiita/leet-code-rs
[INFO] tweaked toml for git repo https://github.com/Tiiita/leet-code-rs written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Tiiita/leet-code-rs on toolchain 2c4e58eac5a232e49065e517c1cf50b2715ccf85
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Tiiita/leet-code-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "fetch" "--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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ce39a7752621b98d29807de4fbaa2b339730d949a2b084a0dcc6e6ce6596ba25
[INFO] running `Command { std: "docker" "start" "-a" "ce39a7752621b98d29807de4fbaa2b339730d949a2b084a0dcc6e6ce6596ba25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce39a7752621b98d29807de4fbaa2b339730d949a2b084a0dcc6e6ce6596ba25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce39a7752621b98d29807de4fbaa2b339730d949a2b084a0dcc6e6ce6596ba25", kill_on_drop: false }`
[INFO] [stdout] ce39a7752621b98d29807de4fbaa2b339730d949a2b084a0dcc6e6ce6596ba25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49a261949d6fbde0b5ecba4cfe2ae3b95124d971c7ea2668408afad2c61d078d
[INFO] running `Command { std: "docker" "start" "-a" "49a261949d6fbde0b5ecba4cfe2ae3b95124d971c7ea2668408afad2c61d078d", kill_on_drop: false }`
[INFO] [stderr]     Checking leet_code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `sudoku`
[INFO] [stdout]   --> src/sudoku_solver.rs:45:17
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn validate_box(sudoku: &Sudoku) -> bool {
[INFO] [stdout]    |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sudoku`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sudoku`
[INFO] [stdout]   --> src/sudoku_solver.rs:45:17
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn validate_box(sudoku: &Sudoku) -> bool {
[INFO] [stdout]    |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sudoku`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]  --> src/palindrome.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn test() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `palindrome_num` is never used
[INFO] [stdout]   --> src/palindrome.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn palindrome_num(num: i32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `palindrome` is never used
[INFO] [stdout]   --> src/palindrome.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn palindrome(chars: Chars<'_>) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_box` is never used
[INFO] [stdout]   --> src/sudoku_solver.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn validate_box(sudoku: &Sudoku) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]  --> src/palindrome.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn test() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `palindrome_num` is never used
[INFO] [stdout]   --> src/palindrome.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn palindrome_num(num: i32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `palindrome` is never used
[INFO] [stdout]   --> src/palindrome.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn palindrome(chars: Chars<'_>) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_box` is never used
[INFO] [stdout]   --> src/sudoku_solver.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn validate_box(sudoku: &Sudoku) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "49a261949d6fbde0b5ecba4cfe2ae3b95124d971c7ea2668408afad2c61d078d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49a261949d6fbde0b5ecba4cfe2ae3b95124d971c7ea2668408afad2c61d078d", kill_on_drop: false }`
[INFO] [stdout] 49a261949d6fbde0b5ecba4cfe2ae3b95124d971c7ea2668408afad2c61d078d