[INFO] cloning repository https://github.com/mpgarate/rust-fifteen-puzzle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mpgarate/rust-fifteen-puzzle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpgarate%2Frust-fifteen-puzzle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpgarate%2Frust-fifteen-puzzle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ecc1c4e0f50d6d7197aac0e18cc619f2fff226db
[INFO] checking mpgarate/rust-fifteen-puzzle against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmpgarate%2Frust-fifteen-puzzle" "/workspace/builds/worker-62/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-62/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mpgarate/rust-fifteen-puzzle on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mpgarate/rust-fifteen-puzzle
[INFO] finished tweaking git repo https://github.com/mpgarate/rust-fifteen-puzzle
[INFO] tweaked toml for git repo https://github.com/mpgarate/rust-fifteen-puzzle written to /workspace/builds/worker-62/source/Cargo.toml
[INFO] crate git repo https://github.com/mpgarate/rust-fifteen-puzzle already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded memchr v0.1.7
[INFO] [stderr]   Downloaded log v0.3.3
[INFO] [stderr]   Downloaded regex-syntax v0.2.2
[INFO] [stderr]   Downloaded env_logger v0.3.2
[INFO] [stderr]   Downloaded inotify v0.1.12
[INFO] [stderr]   Downloaded docopt v0.6.76
[INFO] [stderr]   Downloaded filetime v0.1.6
[INFO] [stderr]   Downloaded libc v0.2.2
[INFO] [stderr]   Downloaded aho-corasick v0.3.4
[INFO] [stderr]   Downloaded fsevent v0.2.11
[INFO] [stderr]   Downloaded walker v1.0.0
[INFO] [stderr]   Downloaded notify v2.4.1
[INFO] [stderr]   Downloaded fsevent-sys v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cbdcc580dd36c45a65c8cb2c614036d7882b687c1a3d1b0490df969a24289ce2
[INFO] running `Command { std: "docker" "start" "-a" "cbdcc580dd36c45a65c8cb2c614036d7882b687c1a3d1b0490df969a24289ce2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cbdcc580dd36c45a65c8cb2c614036d7882b687c1a3d1b0490df969a24289ce2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cbdcc580dd36c45a65c8cb2c614036d7882b687c1a3d1b0490df969a24289ce2", kill_on_drop: false }`
[INFO] [stdout] cbdcc580dd36c45a65c8cb2c614036d7882b687c1a3d1b0490df969a24289ce2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b9f24dbced1a0c7eb44ab7ee8328b75a4e1941859b2b3b2654a38fd12cf96bdd
[INFO] running `Command { std: "docker" "start" "-a" "b9f24dbced1a0c7eb44ab7ee8328b75a4e1941859b2b3b2654a38fd12cf96bdd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: fifteen_puzzle v0.1.0 (/opt/rustwide/workdir) ignoring invalid dependency `cargo-watch` which is missing a lib target
[INFO] [stderr]     Checking fifteen_puzzle v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/solver.rs:128:8
[INFO] [stdout]     |
[INFO] [stdout] 128 |     if (depth > 100000) {
[INFO] [stdout]     |        ^              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 128 -     if (depth > 100000) {
[INFO] [stdout] 128 +     if depth > 100000 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/solver.rs:128:8
[INFO] [stdout]     |
[INFO] [stdout] 128 |     if (depth > 100000) {
[INFO] [stdout]     |        ^              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 128 -     if (depth > 100000) {
[INFO] [stdout] 128 +     if depth > 100000 {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/solver.rs:75:46
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn depth_limited_dfs(state: SolverState, mut depth: u64) -> Option<Vec<MoveDirection>> {
[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/solver.rs:75:46
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn depth_limited_dfs(state: SolverState, mut depth: u64) -> Option<Vec<MoveDirection>> {
[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 is never used: `depth_limited_dfs`
[INFO] [stdout]   --> src/solver.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn depth_limited_dfs(state: SolverState, mut depth: u64) -> Option<Vec<MoveDirection>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `solve_idfs`
[INFO] [stdout]    --> src/solver.rs:118:8
[INFO] [stdout]     |
[INFO] [stdout] 118 | pub fn solve_idfs(state: GameState) -> Option<Vec<MoveDirection>> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.88s
[INFO] running `Command { std: "docker" "inspect" "b9f24dbced1a0c7eb44ab7ee8328b75a4e1941859b2b3b2654a38fd12cf96bdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9f24dbced1a0c7eb44ab7ee8328b75a4e1941859b2b3b2654a38fd12cf96bdd", kill_on_drop: false }`
[INFO] [stdout] b9f24dbced1a0c7eb44ab7ee8328b75a4e1941859b2b3b2654a38fd12cf96bdd