[INFO] cloning repository https://github.com/X-leaf7/hackerrank-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/X-leaf7/hackerrank-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FX-leaf7%2Fhackerrank-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FX-leaf7%2Fhackerrank-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1cdd063cbcc490f1f7f8b328f525049cf0f9f193
[INFO] checking X-leaf7/hackerrank-rust against try#7d2afcda7a9c043d5175cbca3ab08f0acf02b13a for pr-140824
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FX-leaf7%2Fhackerrank-rust" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/X-leaf7/hackerrank-rust on toolchain 7d2afcda7a9c043d5175cbca3ab08f0acf02b13a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7d2afcda7a9c043d5175cbca3ab08f0acf02b13a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/X-leaf7/hackerrank-rust
[INFO] finished tweaking git repo https://github.com/X-leaf7/hackerrank-rust
[INFO] tweaked toml for git repo https://github.com/X-leaf7/hackerrank-rust written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/X-leaf7/hackerrank-rust 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" "+7d2afcda7a9c043d5175cbca3ab08f0acf02b13a" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking X-leaf7/hackerrank-rust against try#7d2afcda7a9c043d5175cbca3ab08f0acf02b13a for pr-140824
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FX-leaf7%2Fhackerrank-rust" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/X-leaf7/hackerrank-rust on toolchain 7d2afcda7a9c043d5175cbca3ab08f0acf02b13a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7d2afcda7a9c043d5175cbca3ab08f0acf02b13a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/X-leaf7/hackerrank-rust
[INFO] finished tweaking git repo https://github.com/X-leaf7/hackerrank-rust
[INFO] tweaked toml for git repo https://github.com/X-leaf7/hackerrank-rust written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/X-leaf7/hackerrank-rust 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" "+7d2afcda7a9c043d5175cbca3ab08f0acf02b13a" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+7d2afcda7a9c043d5175cbca3ab08f0acf02b13a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87c5cd3ffc4140a7cc7d34509ee27eb558bbe86f3621f0dd2a612b95b82cf5d1
[INFO] running `Command { std: "docker" "start" "-a" "87c5cd3ffc4140a7cc7d34509ee27eb558bbe86f3621f0dd2a612b95b82cf5d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87c5cd3ffc4140a7cc7d34509ee27eb558bbe86f3621f0dd2a612b95b82cf5d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87c5cd3ffc4140a7cc7d34509ee27eb558bbe86f3621f0dd2a612b95b82cf5d1", kill_on_drop: false }`
[INFO] [stdout] 87c5cd3ffc4140a7cc7d34509ee27eb558bbe86f3621f0dd2a612b95b82cf5d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+7d2afcda7a9c043d5175cbca3ab08f0acf02b13a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5fe84e794ccead6f80a24e9050a0cceaf57d39bb8aa118f307ff36dc27d225cc
[INFO] running `Command { std: "docker" "start" "-a" "5fe84e794ccead6f80a24e9050a0cceaf57d39bb8aa118f307ff36dc27d225cc", kill_on_drop: false }`
[INFO] [stderr]     Checking divisible-sum-pairs v0.1.0 (/opt/rustwide/workdir/divisible-sum-pairs)
[INFO] [stderr]     Checking camel-case v0.1.0 (/opt/rustwide/workdir/camel-case)
[INFO] [stderr]     Checking lonely-integer v0.1.0 (/opt/rustwide/workdir/lonely-integer)
[INFO] [stderr]     Checking grading-students v0.1.0 (/opt/rustwide/workdir/grading-students)
[INFO] [stderr]     Checking counting-sort v0.1.0 (/opt/rustwide/workdir/counting-sort)
[INFO] [stderr]     Checking breaking-records v0.1.0 (/opt/rustwide/workdir/breaking-records)
[INFO] [stderr]     Checking sparse-arrays v0.1.0 (/opt/rustwide/workdir/sparse-arrays)
[INFO] [stderr]     Checking counting-valleys v0.1.0 (/opt/rustwide/workdir/counting-valleys)
[INFO] [stderr]     Checking diagonal-difference v0.1.0 (/opt/rustwide/workdir/diagonal-difference)
[INFO] [stderr]     Checking read-inputs v0.1.0 (/opt/rustwide/workdir/read-inputs)
[INFO] [stderr]     Checking pangrams v0.1.0 (/opt/rustwide/workdir/pangrams)
[INFO] [stderr]     Checking flipping-bits v0.1.0 (/opt/rustwide/workdir/flipping-bits)
[INFO] [stderr]     Checking plus-minus v0.1.0 (/opt/rustwide/workdir/plus-minus)
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> grading-students/src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let n = stdin_iterator.next().unwrap().unwrap().trim().parse::<i32>().unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `steps`
[INFO] [stdout]  --> counting-valleys/src/main.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn counting_valleys(steps: i32, path: &str) -> i32 {
[INFO] [stdout]   |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_steps`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]  --> read-inputs/src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let n = stdin_iterator.next().unwrap().unwrap().trim().parse::<i32>().unwrap();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `values`
[INFO] [stdout]  --> read-inputs/src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let values: Vec<i32> = stdin_iterator.next().unwrap().unwrap()
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_values`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> grading-students/src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let n = stdin_iterator.next().unwrap().unwrap().trim().parse::<i32>().unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking mini-max-sum v0.1.0 (/opt/rustwide/workdir/mini-max-sum)
[INFO] [stderr]     Checking time-conversion v0.1.0 (/opt/rustwide/workdir/time-conversion)
[INFO] [stderr]     Checking mars-exploration v0.1.0 (/opt/rustwide/workdir/mars-exploration)
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]  --> read-inputs/src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let n = stdin_iterator.next().unwrap().unwrap().trim().parse::<i32>().unwrap();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `values`
[INFO] [stdout]  --> read-inputs/src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let values: Vec<i32> = stdin_iterator.next().unwrap().unwrap()
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_values`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `steps`
[INFO] [stdout]  --> counting-valleys/src/main.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn counting_valleys(steps: i32, path: &str) -> i32 {
[INFO] [stdout]   |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_steps`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "5fe84e794ccead6f80a24e9050a0cceaf57d39bb8aa118f307ff36dc27d225cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fe84e794ccead6f80a24e9050a0cceaf57d39bb8aa118f307ff36dc27d225cc", kill_on_drop: false }`
[INFO] [stdout] 5fe84e794ccead6f80a24e9050a0cceaf57d39bb8aa118f307ff36dc27d225cc