[INFO] cloning repository https://github.com/Trustacean/hackerrank-solutions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Trustacean/hackerrank-solutions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrustacean%2Fhackerrank-solutions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrustacean%2Fhackerrank-solutions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 532e10a7f9aed09b9241dea3051cbc6b76e26acf
[INFO] checking Trustacean/hackerrank-solutions against try#1383df06117fd218068d1f39fd5326256dd4a348 for pr-145181
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrustacean%2Fhackerrank-solutions" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Trustacean/hackerrank-solutions
[INFO] finished tweaking git repo https://github.com/Trustacean/hackerrank-solutions
[INFO] tweaked toml for git repo https://github.com/Trustacean/hackerrank-solutions written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Trustacean/hackerrank-solutions on toolchain 1383df06117fd218068d1f39fd5326256dd4a348
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1383df06117fd218068d1f39fd5326256dd4a348" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Trustacean/hackerrank-solutions 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" "+1383df06117fd218068d1f39fd5326256dd4a348" "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 Trustacean/hackerrank-solutions against try#1383df06117fd218068d1f39fd5326256dd4a348 for pr-145181
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrustacean%2Fhackerrank-solutions" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Trustacean/hackerrank-solutions
[INFO] finished tweaking git repo https://github.com/Trustacean/hackerrank-solutions
[INFO] tweaked toml for git repo https://github.com/Trustacean/hackerrank-solutions written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Trustacean/hackerrank-solutions on toolchain 1383df06117fd218068d1f39fd5326256dd4a348
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1383df06117fd218068d1f39fd5326256dd4a348" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Trustacean/hackerrank-solutions 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" "+1383df06117fd218068d1f39fd5326256dd4a348" "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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+1383df06117fd218068d1f39fd5326256dd4a348" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d9505ce4d187a978bcde084cfa43fd086ed5b3a38ae9318271f16c47500a7dc
[INFO] running `Command { std: "docker" "start" "-a" "8d9505ce4d187a978bcde084cfa43fd086ed5b3a38ae9318271f16c47500a7dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d9505ce4d187a978bcde084cfa43fd086ed5b3a38ae9318271f16c47500a7dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d9505ce4d187a978bcde084cfa43fd086ed5b3a38ae9318271f16c47500a7dc", kill_on_drop: false }`
[INFO] [stdout] 8d9505ce4d187a978bcde084cfa43fd086ed5b3a38ae9318271f16c47500a7dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+1383df06117fd218068d1f39fd5326256dd4a348" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd710157907937b6069f770aa0cd6f2cd4c4dee50d610c1fb109bb83fa9f5ac5
[INFO] running `Command { std: "docker" "start" "-a" "bd710157907937b6069f770aa0cd6f2cd4c4dee50d610c1fb109bb83fa9f5ac5", kill_on_drop: false }`
[INFO] [stderr]     Checking algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> algorithms/01_implementations/08_bill_division/main.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let n = first_multiple_input[0].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: `n`
[INFO] [stdout]   --> algorithms/01_implementations/08_bill_division/main.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let n = first_multiple_input[0].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: `m`
[INFO] [stdout]   --> algorithms/01_implementations/01_apples_and_oranges/main.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let m = third_multiple_input[0].trim().parse::<i32>().unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> algorithms/01_implementations/01_apples_and_oranges/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let n = third_multiple_input[1].trim().parse::<i32>().unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> algorithms/01_implementations/03_between_two_sets/main.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let n = first_multiple_input[0].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: `m`
[INFO] [stdout]   --> algorithms/01_implementations/03_between_two_sets/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let m = first_multiple_input[1].trim().parse::<i32>().unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> algorithms/00_warmup/05_plus_minus/main.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     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: `n`
[INFO] [stdout]   --> algorithms/01_implementations/15_picking_numbers/main.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let n = stdin_iterator
[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: `n`
[INFO] [stdout]   --> algorithms/01_implementations/03_between_two_sets/main.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let n = first_multiple_input[0].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: `m`
[INFO] [stdout]   --> algorithms/01_implementations/03_between_two_sets/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let m = first_multiple_input[1].trim().parse::<i32>().unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> algorithms/01_implementations/04_subarray_division/main.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     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: `m`
[INFO] [stdout]   --> algorithms/01_implementations/01_apples_and_oranges/main.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let m = third_multiple_input[0].trim().parse::<i32>().unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> algorithms/01_implementations/01_apples_and_oranges/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let n = third_multiple_input[1].trim().parse::<i32>().unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> algorithms/01_implementations/04_subarray_division/main.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     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: `n`
[INFO] [stdout]   --> algorithms/00_warmup/05_plus_minus/main.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     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: `n`
[INFO] [stdout]   --> algorithms/01_implementations/15_picking_numbers/main.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let n = stdin_iterator
[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]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "bd710157907937b6069f770aa0cd6f2cd4c4dee50d610c1fb109bb83fa9f5ac5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd710157907937b6069f770aa0cd6f2cd4c4dee50d610c1fb109bb83fa9f5ac5", kill_on_drop: false }`
[INFO] [stdout] bd710157907937b6069f770aa0cd6f2cd4c4dee50d610c1fb109bb83fa9f5ac5