[INFO] cloning repository https://github.com/r4f4/game-fifteen-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/r4f4/game-fifteen-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fr4f4%2Fgame-fifteen-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fr4f4%2Fgame-fifteen-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 28bd9185d765337fb7c6aee0d9d33ab21f7d4d22
[INFO] checking r4f4/game-fifteen-rs against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fr4f4%2Fgame-fifteen-rs" "/workspace/builds/worker-29/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-29/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/r4f4/game-fifteen-rs on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/r4f4/game-fifteen-rs
[INFO] finished tweaking git repo https://github.com/r4f4/game-fifteen-rs
[INFO] tweaked toml for git repo https://github.com/r4f4/game-fifteen-rs written to /workspace/builds/worker-29/source/Cargo.toml
[INFO] crate git repo https://github.com/r4f4/game-fifteen-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] acf889311c7b8122d1b6fb01e03c309c7cbf2abb06dcfd2f9ef49a4b91211e1b
[INFO] running `Command { std: "docker" "start" "-a" "acf889311c7b8122d1b6fb01e03c309c7cbf2abb06dcfd2f9ef49a4b91211e1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "acf889311c7b8122d1b6fb01e03c309c7cbf2abb06dcfd2f9ef49a4b91211e1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acf889311c7b8122d1b6fb01e03c309c7cbf2abb06dcfd2f9ef49a4b91211e1b", kill_on_drop: false }`
[INFO] [stdout] acf889311c7b8122d1b6fb01e03c309c7cbf2abb06dcfd2f9ef49a4b91211e1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c2e52a2fa159a5d5c5f1355ab1f2c81aa557116d8f87626d2449b3485d2adbd
[INFO] running `Command { std: "docker" "start" "-a" "2c2e52a2fa159a5d5c5f1355ab1f2c81aa557116d8f87626d2449b3485d2adbd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking game15 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/solver.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         ((diff / 4) + (diff % 4)) // # of rows + cols to move
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/solver.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         ((diff / 4) + (diff % 4)) // # of rows + cols to move
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.38s
[INFO] running `Command { std: "docker" "inspect" "2c2e52a2fa159a5d5c5f1355ab1f2c81aa557116d8f87626d2449b3485d2adbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c2e52a2fa159a5d5c5f1355ab1f2c81aa557116d8f87626d2449b3485d2adbd", kill_on_drop: false }`
[INFO] [stdout] 2c2e52a2fa159a5d5c5f1355ab1f2c81aa557116d8f87626d2449b3485d2adbd