[INFO] cloning repository https://github.com/alex-bezverkhniy/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alex-bezverkhniy/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falex-bezverkhniy%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falex-bezverkhniy%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 21ca27bac7ab2b36d8001dabccc88b7b2b4ecec1
[INFO] testing alex-bezverkhniy/rust-playground against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falex-bezverkhniy%2Frust-playground" "/workspace/builds/worker-18/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-18/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alex-bezverkhniy/rust-playground on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/alex-bezverkhniy/rust-playground
[INFO] finished tweaking git repo https://github.com/alex-bezverkhniy/rust-playground
[INFO] tweaked toml for git repo https://github.com/alex-bezverkhniy/rust-playground written to /workspace/builds/worker-18/source/Cargo.toml
[INFO] crate git repo https://github.com/alex-bezverkhniy/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a0124ef645fd797e6af1e55e8f71a175294d8d7bd4f3dc797b2daa575632affa
[INFO] running `Command { std: "docker" "start" "-a" "a0124ef645fd797e6af1e55e8f71a175294d8d7bd4f3dc797b2daa575632affa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0124ef645fd797e6af1e55e8f71a175294d8d7bd4f3dc797b2daa575632affa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0124ef645fd797e6af1e55e8f71a175294d8d7bd4f3dc797b2daa575632affa", kill_on_drop: false }`
[INFO] [stdout] a0124ef645fd797e6af1e55e8f71a175294d8d7bd4f3dc797b2daa575632affa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 636c97c1fc7b209320f77b3da6b0eb1347478d9a9ad3f7612a0c0661e1b723c9
[INFO] running `Command { std: "docker" "start" "-a" "636c97c1fc7b209320f77b3da6b0eb1347478d9a9ad3f7612a0c0661e1b723c9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `safe_division`
[INFO] [stdout]  --> src/option_demo.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn safe_division(dividen: u32, division: u32) -> Option<u32> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` 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 4.71s
[INFO] running `Command { std: "docker" "inspect" "636c97c1fc7b209320f77b3da6b0eb1347478d9a9ad3f7612a0c0661e1b723c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "636c97c1fc7b209320f77b3da6b0eb1347478d9a9ad3f7612a0c0661e1b723c9", kill_on_drop: false }`
[INFO] [stdout] 636c97c1fc7b209320f77b3da6b0eb1347478d9a9ad3f7612a0c0661e1b723c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ec5d7f639687a9dca678ac8ae65e074f9a18895545bb20c93f3e4ec10168b8d
[INFO] running `Command { std: "docker" "start" "-a" "4ec5d7f639687a9dca678ac8ae65e074f9a18895545bb20c93f3e4ec10168b8d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "4ec5d7f639687a9dca678ac8ae65e074f9a18895545bb20c93f3e4ec10168b8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ec5d7f639687a9dca678ac8ae65e074f9a18895545bb20c93f3e4ec10168b8d", kill_on_drop: false }`
[INFO] [stdout] 4ec5d7f639687a9dca678ac8ae65e074f9a18895545bb20c93f3e4ec10168b8d