[INFO] fetching crate mkv_chain 0.3.1...
[INFO] checking mkv_chain-0.3.1 against beta for pr-78714
[INFO] extracting crate mkv_chain 0.3.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate mkv_chain 0.3.1 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 mkv_chain 0.3.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mkv_chain 0.3.1
[INFO] tweaked toml for crates.io crate mkv_chain 0.3.1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate mkv_chain 0.3.1 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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 9a1f3bcaaeb857a26ea5c0538850d8f4a06def7e1589125714e5132b070e525a
[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" "9a1f3bcaaeb857a26ea5c0538850d8f4a06def7e1589125714e5132b070e525a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a1f3bcaaeb857a26ea5c0538850d8f4a06def7e1589125714e5132b070e525a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a1f3bcaaeb857a26ea5c0538850d8f4a06def7e1589125714e5132b070e525a", kill_on_drop: false }`
[INFO] [stdout] 9a1f3bcaaeb857a26ea5c0538850d8f4a06def7e1589125714e5132b070e525a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 8c7eb2d659b4558ec8a39e774acb8176eee2cec9dadc7a6ce51d839e67d07c47
[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" "8c7eb2d659b4558ec8a39e774acb8176eee2cec9dadc7a6ce51d839e67d07c47", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.0
[INFO] [stderr]     Checking mkv_chain v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking toml v0.5.3
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking pulldown-cmark v0.4.1
[INFO] [stderr]     Checking version-sync v0.8.1
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.28s
[INFO] running `Command { std: "docker" "inspect" "8c7eb2d659b4558ec8a39e774acb8176eee2cec9dadc7a6ce51d839e67d07c47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c7eb2d659b4558ec8a39e774acb8176eee2cec9dadc7a6ce51d839e67d07c47", kill_on_drop: false }`
[INFO] [stdout] 8c7eb2d659b4558ec8a39e774acb8176eee2cec9dadc7a6ce51d839e67d07c47