[INFO] cloning repository https://github.com/mehrati/sudoku_solution
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mehrati/sudoku_solution" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmehrati%2Fsudoku_solution", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmehrati%2Fsudoku_solution'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bb2eb0dcd28e23f5db86f27940fba6aaf653308a
[INFO] checking mehrati/sudoku_solution against master#0c1fb2a1e65a57073dc62dd502319a00cf753371 for pr-114655
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmehrati%2Fsudoku_solution" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mehrati/sudoku_solution on toolchain 0c1fb2a1e65a57073dc62dd502319a00cf753371
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c1fb2a1e65a57073dc62dd502319a00cf753371" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mehrati/sudoku_solution
[INFO] finished tweaking git repo https://github.com/mehrati/sudoku_solution
[INFO] tweaked toml for git repo https://github.com/mehrati/sudoku_solution written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mehrati/sudoku_solution 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" "+0c1fb2a1e65a57073dc62dd502319a00cf753371" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking mehrati/sudoku_solution against try#1d06cad56a6e74d21cdf272bd6d9479160000fba for pr-114655
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmehrati%2Fsudoku_solution" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mehrati/sudoku_solution on toolchain 1d06cad56a6e74d21cdf272bd6d9479160000fba
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mehrati/sudoku_solution
[INFO] finished tweaking git repo https://github.com/mehrati/sudoku_solution
[INFO] tweaked toml for git repo https://github.com/mehrati/sudoku_solution written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mehrati/sudoku_solution 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" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "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 mehrati/sudoku_solution against try#1d06cad56a6e74d21cdf272bd6d9479160000fba for pr-114655
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmehrati%2Fsudoku_solution" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mehrati/sudoku_solution on toolchain 1d06cad56a6e74d21cdf272bd6d9479160000fba
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mehrati/sudoku_solution
[INFO] finished tweaking git repo https://github.com/mehrati/sudoku_solution
[INFO] tweaked toml for git repo https://github.com/mehrati/sudoku_solution written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mehrati/sudoku_solution 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" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7bfa8ac042f9fd06542face164cb267e870592a4218894f39623b62a1162419c
[INFO] running `Command { std: "docker" "start" "-a" "7bfa8ac042f9fd06542face164cb267e870592a4218894f39623b62a1162419c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7bfa8ac042f9fd06542face164cb267e870592a4218894f39623b62a1162419c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bfa8ac042f9fd06542face164cb267e870592a4218894f39623b62a1162419c", kill_on_drop: false }`
[INFO] [stdout] 7bfa8ac042f9fd06542face164cb267e870592a4218894f39623b62a1162419c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1d06cad56a6e74d21cdf272bd6d9479160000fba" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eba3942a7f40d5bb0feb6cf3c857566ea151a0e684591904fd6734e757576e1a
[INFO] running `Command { std: "docker" "start" "-a" "eba3942a7f40d5bb0feb6cf3c857566ea151a0e684591904fd6734e757576e1a", kill_on_drop: false }`
[INFO] [stderr]     Checking sudoku_solution v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `cell` should have an upper camel case name
[INFO] [stdout]   --> src/main.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | type cell = Cell;
[INFO] [stdout]    |      ^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Cell`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `cell` should have an upper camel case name
[INFO] [stdout]   --> src/main.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | type cell = Cell;
[INFO] [stdout]    |      ^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Cell`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:107:41
[INFO] [stdout]     |
[INFO] [stdout] 107 |         Err(e) => panic!("problem {}",e.description()),
[INFO] [stdout]     |                                         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:107:41
[INFO] [stdout]     |
[INFO] [stdout] 107 |         Err(e) => panic!("problem {}",e.description()),
[INFO] [stdout]     |                                         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/main.rs:111:13
[INFO] [stdout]     |
[INFO] [stdout] 111 |         Err(e) => panic!("err"),
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]    --> src/main.rs:117:13
[INFO] [stdout]     |
[INFO] [stdout] 117 |     let mut arr:[[i32;9];9]= [[0;9];9];
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/main.rs:111:13
[INFO] [stdout]     |
[INFO] [stdout] 111 |         Err(e) => panic!("err"),
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]    --> src/main.rs:117:13
[INFO] [stdout]     |
[INFO] [stdout] 117 |     let mut arr:[[i32;9];9]= [[0;9];9];
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:117:9
[INFO] [stdout]     |
[INFO] [stdout] 117 |     let mut arr:[[i32;9];9]= [[0;9];9];
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:117:9
[INFO] [stdout]     |
[INFO] [stdout] 117 |     let mut arr:[[i32;9];9]= [[0;9];9];
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "eba3942a7f40d5bb0feb6cf3c857566ea151a0e684591904fd6734e757576e1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eba3942a7f40d5bb0feb6cf3c857566ea151a0e684591904fd6734e757576e1a", kill_on_drop: false }`
[INFO] [stdout] eba3942a7f40d5bb0feb6cf3c857566ea151a0e684591904fd6734e757576e1a