[INFO] cloning repository https://github.com/jculverhouse/queens_problem
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jculverhouse/queens_problem" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjculverhouse%2Fqueens_problem", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjculverhouse%2Fqueens_problem'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 37c427b3d85937287b844c798b99a93caad44a0b
[INFO] checking jculverhouse/queens_problem against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjculverhouse%2Fqueens_problem" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jculverhouse/queens_problem on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jculverhouse/queens_problem
[INFO] finished tweaking git repo https://github.com/jculverhouse/queens_problem
[INFO] tweaked toml for git repo https://github.com/jculverhouse/queens_problem written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/jculverhouse/queens_problem already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded signal-hook v0.1.16
[INFO] [stderr]   Downloaded mio v0.7.0
[INFO] [stderr]   Downloaded crossterm v0.17.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "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] cc1e02699597fbe852e14a35bc8763c2919cacb94c7c2148de0901a21d35dcdf
[INFO] running `Command { std: "docker" "start" "-a" "cc1e02699597fbe852e14a35bc8763c2919cacb94c7c2148de0901a21d35dcdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc1e02699597fbe852e14a35bc8763c2919cacb94c7c2148de0901a21d35dcdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc1e02699597fbe852e14a35bc8763c2919cacb94c7c2148de0901a21d35dcdf", kill_on_drop: false }`
[INFO] [stdout] cc1e02699597fbe852e14a35bc8763c2919cacb94c7c2148de0901a21d35dcdf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57737b01d50385533299beb54667404c9d66efd4eff9dba3df12065b4f6441e5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "57737b01d50385533299beb54667404c9d66efd4eff9dba3df12065b4f6441e5", kill_on_drop: false }`
[INFO] [stderr]     Checking smallvec v1.4.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking mio v0.7.0
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking signal-hook v0.1.16
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking crossterm v0.17.6
[INFO] [stderr]     Checking queens_problem v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.96s
[INFO] running `Command { std: "docker" "inspect" "57737b01d50385533299beb54667404c9d66efd4eff9dba3df12065b4f6441e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57737b01d50385533299beb54667404c9d66efd4eff9dba3df12065b4f6441e5", kill_on_drop: false }`
[INFO] [stdout] 57737b01d50385533299beb54667404c9d66efd4eff9dba3df12065b4f6441e5