[INFO] cloning repository https://github.com/noraa-july-stoke/rust_dsna
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/noraa-july-stoke/rust_dsna" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoraa-july-stoke%2Frust_dsna", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoraa-july-stoke%2Frust_dsna'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 62ae1b49d2034cc3d07f753481e2075ef253faa9
[INFO] checking noraa-july-stoke/rust_dsna against try#e071e73523bfcdcab2878dbf652ac8ebb9b9eee4 for pr-144386
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoraa-july-stoke%2Frust_dsna" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] [stderr] error: unable to write file target/debug/incremental/rust_dsna-ycvht171ledg/s-glsr1qn5hx-1yu92vy-klnstkhx2x1p/dep-graph.bin
[INFO] [stderr] error: unable to write file target/debug/incremental/rust_dsna-ycvht171ledg/s-glsr1qn5hx-1yu92vy-klnstkhx2x1p/query-cache.bin
[INFO] [stderr] error: unable to write file target/debug/incremental/rust_dsna-ycvht171ledg/s-glsr1qn5hx-1yu92vy-klnstkhx2x1p/work-products.bin
[INFO] [stderr] error: unable to write file target/debug/rust_dsna
[INFO] [stderr] error: unable to write file target/debug/rust_dsna.d
[INFO] [stderr] fatal: unable to checkout working tree
[INFO] [stderr] warning: Clone succeeded, but checkout failed.
[INFO] [stderr] You can inspect what was checked out with 'git status'
[INFO] [stderr] and retry with 'git restore --source=HEAD :/'
[INFO] [stderr] 
[INFO] checking noraa-july-stoke/rust_dsna against try#e071e73523bfcdcab2878dbf652ac8ebb9b9eee4 for pr-144386
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoraa-july-stoke%2Frust_dsna" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/noraa-july-stoke/rust_dsna
[INFO] finished tweaking git repo https://github.com/noraa-july-stoke/rust_dsna
[INFO] tweaked toml for git repo https://github.com/noraa-july-stoke/rust_dsna written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/noraa-july-stoke/rust_dsna on toolchain e071e73523bfcdcab2878dbf652ac8ebb9b9eee4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e071e73523bfcdcab2878dbf652ac8ebb9b9eee4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/noraa-july-stoke/rust_dsna 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" "+e071e73523bfcdcab2878dbf652ac8ebb9b9eee4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+e071e73523bfcdcab2878dbf652ac8ebb9b9eee4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2437f3afb3f9528ec4463e34d93266a20722be7dde4d123d8f9dd68e3fe60824
[INFO] running `Command { std: "docker" "start" "-a" "2437f3afb3f9528ec4463e34d93266a20722be7dde4d123d8f9dd68e3fe60824", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2437f3afb3f9528ec4463e34d93266a20722be7dde4d123d8f9dd68e3fe60824", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2437f3afb3f9528ec4463e34d93266a20722be7dde4d123d8f9dd68e3fe60824", kill_on_drop: false }`
[INFO] [stdout] 2437f3afb3f9528ec4463e34d93266a20722be7dde4d123d8f9dd68e3fe60824
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+e071e73523bfcdcab2878dbf652ac8ebb9b9eee4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3d5e5820917f7054c13d2524274d6732a42d029b397f7b02ec5d69b1006d6e6
[INFO] running `Command { std: "docker" "start" "-a" "b3d5e5820917f7054c13d2524274d6732a42d029b397f7b02ec5d69b1006d6e6", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_dsna v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/word_search.rs:34:17
[INFO] [stdout]    |
[INFO] [stdout] 34 |             let mut s_idx = 0;
[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: function `exist` is never used
[INFO] [stdout]  --> src/word_search.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn exist(board: Vec<Vec<char>>, word: String) -> bool {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/word_search.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |         if row < 0 || row >= board.len() || col < 0 || col >= board.len() || board[row][col] != word.chars().nth(s_idx).unwrap() {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/word_search.rs:16:45
[INFO] [stdout]    |
[INFO] [stdout] 16 |         if row < 0 || row >= board.len() || col < 0 || col >= board.len() || board[row][col] != word.chars().nth(s_idx).unwrap() {
[INFO] [stdout]    |                                             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/word_search.rs:34:17
[INFO] [stdout]    |
[INFO] [stdout] 34 |             let mut s_idx = 0;
[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: function `exist` is never used
[INFO] [stdout]  --> src/word_search.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn exist(board: Vec<Vec<char>>, word: String) -> bool {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/word_search.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |         if row < 0 || row >= board.len() || col < 0 || col >= board.len() || board[row][col] != word.chars().nth(s_idx).unwrap() {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/word_search.rs:16:45
[INFO] [stdout]    |
[INFO] [stdout] 16 |         if row < 0 || row >= board.len() || col < 0 || col >= board.len() || board[row][col] != word.chars().nth(s_idx).unwrap() {
[INFO] [stdout]    |                                             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "b3d5e5820917f7054c13d2524274d6732a42d029b397f7b02ec5d69b1006d6e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3d5e5820917f7054c13d2524274d6732a42d029b397f7b02ec5d69b1006d6e6", kill_on_drop: false }`
[INFO] [stdout] b3d5e5820917f7054c13d2524274d6732a42d029b397f7b02ec5d69b1006d6e6