[INFO] fetching crate simple-slab 0.3.3...
[INFO] checking simple-slab-0.3.3 against beta for pr-78714
[INFO] extracting crate simple-slab 0.3.3 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate simple-slab 0.3.3 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate simple-slab 0.3.3
[INFO] finished tweaking crates.io crate simple-slab 0.3.3
[INFO] tweaked toml for crates.io crate simple-slab 0.3.3 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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" "+beta" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 41f6ced1f67957a46b6708eb5b7309b2313048bd4e01364bc8d6704deb7f272c
[INFO] running `Command { std: "docker" "start" "-a" "41f6ced1f67957a46b6708eb5b7309b2313048bd4e01364bc8d6704deb7f272c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41f6ced1f67957a46b6708eb5b7309b2313048bd4e01364bc8d6704deb7f272c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41f6ced1f67957a46b6708eb5b7309b2313048bd4e01364bc8d6704deb7f272c", kill_on_drop: false }`
[INFO] [stdout] 41f6ced1f67957a46b6708eb5b7309b2313048bd4e01364bc8d6704deb7f272c
[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=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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e16be44e4c283568a05f1824fd7d0a4c98b0dc45f9e6becc7d5d243ea39b6b17
[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" "e16be44e4c283568a05f1824fd7d0a4c98b0dc45f9e6becc7d5d243ea39b6b17", kill_on_drop: false }`
[INFO] [stderr]     Checking simple-slab v0.3.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "e16be44e4c283568a05f1824fd7d0a4c98b0dc45f9e6becc7d5d243ea39b6b17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e16be44e4c283568a05f1824fd7d0a4c98b0dc45f9e6becc7d5d243ea39b6b17", kill_on_drop: false }`
[INFO] [stdout] e16be44e4c283568a05f1824fd7d0a4c98b0dc45f9e6becc7d5d243ea39b6b17