[INFO] fetching crate oqueue 0.1.2...
[INFO] checking oqueue-0.1.2 against beta for pr-78714
[INFO] extracting crate oqueue 0.1.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate oqueue 0.1.2 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4/source/.cargo/config
[INFO] started tweaking crates.io crate oqueue 0.1.2
[INFO] finished tweaking crates.io crate oqueue 0.1.2
[INFO] tweaked toml for crates.io crate oqueue 0.1.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate oqueue 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stdout] 1631fa6b12b18eb6bec6c5f492f0c2dd225fbf572fc3201de68da5ced0729902
[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" "1631fa6b12b18eb6bec6c5f492f0c2dd225fbf572fc3201de68da5ced0729902", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1631fa6b12b18eb6bec6c5f492f0c2dd225fbf572fc3201de68da5ced0729902", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1631fa6b12b18eb6bec6c5f492f0c2dd225fbf572fc3201de68da5ced0729902", kill_on_drop: false }`
[INFO] [stdout] 1631fa6b12b18eb6bec6c5f492f0c2dd225fbf572fc3201de68da5ced0729902
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] a8f064f15e708479372c3d4cf71def1ce51b348901b90455bdaea35148d55e34
[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" "a8f064f15e708479372c3d4cf71def1ce51b348901b90455bdaea35148d55e34", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling rayon-core v1.8.1
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]    Compiling rayon v1.4.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]    Compiling readonly v0.2.0
[INFO] [stderr]     Checking oqueue v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.78s
[INFO] running `Command { std: "docker" "inspect" "a8f064f15e708479372c3d4cf71def1ce51b348901b90455bdaea35148d55e34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8f064f15e708479372c3d4cf71def1ce51b348901b90455bdaea35148d55e34", kill_on_drop: false }`
[INFO] [stdout] a8f064f15e708479372c3d4cf71def1ce51b348901b90455bdaea35148d55e34