[INFO] fetching crate callback 0.5.3...
[INFO] checking callback-0.5.3 against 1.55.0 for beta-1.56-3
[INFO] extracting crate callback 0.5.3 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate callback 0.5.3 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 callback 0.5.3
[INFO] finished tweaking crates.io crate callback 0.5.3
[INFO] tweaked toml for crates.io crate callback 0.5.3 written to /workspace/builds/worker-8/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 5b8f3f19800383dae8e6f654b5facd6c8d4df8fb57b887fc65699e6650153243
[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" "5b8f3f19800383dae8e6f654b5facd6c8d4df8fb57b887fc65699e6650153243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b8f3f19800383dae8e6f654b5facd6c8d4df8fb57b887fc65699e6650153243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b8f3f19800383dae8e6f654b5facd6c8d4df8fb57b887fc65699e6650153243", kill_on_drop: false }`
[INFO] [stdout] 5b8f3f19800383dae8e6f654b5facd6c8d4df8fb57b887fc65699e6650153243
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b742e64529eaf9b8696c466bcd404cc6b4d73ecca85d305843212cf0b201edf1
[INFO] running `Command { std: "docker" "start" "-a" "b742e64529eaf9b8696c466bcd404cc6b4d73ecca85d305843212cf0b201edf1", kill_on_drop: false }`
[INFO] [stderr]     Checking callback v0.5.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `Command { std: "docker" "inspect" "b742e64529eaf9b8696c466bcd404cc6b4d73ecca85d305843212cf0b201edf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b742e64529eaf9b8696c466bcd404cc6b4d73ecca85d305843212cf0b201edf1", kill_on_drop: false }`
[INFO] [stdout] b742e64529eaf9b8696c466bcd404cc6b4d73ecca85d305843212cf0b201edf1
