[INFO] cloning repository https://github.com/terakun/spanning_tree_maze
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/terakun/spanning_tree_maze" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fterakun%2Fspanning_tree_maze", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fterakun%2Fspanning_tree_maze'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7d76ea3667cf2b8d531d7634fb620d8387038961
[INFO] checking terakun/spanning_tree_maze against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fterakun%2Fspanning_tree_maze" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/terakun/spanning_tree_maze on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/terakun/spanning_tree_maze
[INFO] finished tweaking git repo https://github.com/terakun/spanning_tree_maze
[INFO] tweaked toml for git repo https://github.com/terakun/spanning_tree_maze written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/terakun/spanning_tree_maze already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3f7e51649bad7e0d8dfd5da04b610a93c53cf24f885a9cad3657e5f1fa58be3c
[INFO] running `Command { std: "docker" "start" "-a" "3f7e51649bad7e0d8dfd5da04b610a93c53cf24f885a9cad3657e5f1fa58be3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f7e51649bad7e0d8dfd5da04b610a93c53cf24f885a9cad3657e5f1fa58be3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f7e51649bad7e0d8dfd5da04b610a93c53cf24f885a9cad3657e5f1fa58be3c", kill_on_drop: false }`
[INFO] [stdout] 3f7e51649bad7e0d8dfd5da04b610a93c53cf24f885a9cad3657e5f1fa58be3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7bdf1bac2f723bdd3517427d1d76440ea53105d30952524a248e7b55c30fb4de
[INFO] running `Command { std: "docker" "start" "-a" "7bdf1bac2f723bdd3517427d1d76440ea53105d30952524a248e7b55c30fb4de", kill_on_drop: false }`
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking spanning_tree_maze v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.36s
[INFO] running `Command { std: "docker" "inspect" "7bdf1bac2f723bdd3517427d1d76440ea53105d30952524a248e7b55c30fb4de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bdf1bac2f723bdd3517427d1d76440ea53105d30952524a248e7b55c30fb4de", kill_on_drop: false }`
[INFO] [stdout] 7bdf1bac2f723bdd3517427d1d76440ea53105d30952524a248e7b55c30fb4de