[INFO] fetching crate lib0 0.1.0...
[INFO] checking lib0-0.1.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate lib0 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate lib0 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lib0 0.1.0
[INFO] finished tweaking crates.io crate lib0 0.1.0
[INFO] tweaked toml for crates.io crate lib0 0.1.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f0d5f3210e7b6ec3280cddd54426f0ae97ca62c95c8e5d53ab0bddf31edbe89e
[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" "f0d5f3210e7b6ec3280cddd54426f0ae97ca62c95c8e5d53ab0bddf31edbe89e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f0d5f3210e7b6ec3280cddd54426f0ae97ca62c95c8e5d53ab0bddf31edbe89e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0d5f3210e7b6ec3280cddd54426f0ae97ca62c95c8e5d53ab0bddf31edbe89e", kill_on_drop: false }`
[INFO] [stdout] f0d5f3210e7b6ec3280cddd54426f0ae97ca62c95c8e5d53ab0bddf31edbe89e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cc49f576aa4e0e52962295cc50bb0897d37812f44197932d07917e769da18347
[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" "cc49f576aa4e0e52962295cc50bb0897d37812f44197932d07917e769da18347", kill_on_drop: false }`
[INFO] [stderr]     Checking lib0 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling proptest-derive v0.3.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.96s
[INFO] running `Command { std: "docker" "inspect" "cc49f576aa4e0e52962295cc50bb0897d37812f44197932d07917e769da18347", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc49f576aa4e0e52962295cc50bb0897d37812f44197932d07917e769da18347", kill_on_drop: false }`
[INFO] [stdout] cc49f576aa4e0e52962295cc50bb0897d37812f44197932d07917e769da18347
