[INFO] fetching crate b2sum-rust 0.1.0...
[INFO] checking b2sum-rust-0.1.0 against master#31ee872db5aae4750e3da1ca4ed1523c4356947f for pr-78461
[INFO] extracting crate b2sum-rust 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate b2sum-rust 0.1.0 on toolchain 31ee872db5aae4750e3da1ca4ed1523c4356947f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+31ee872db5aae4750e3da1ca4ed1523c4356947f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate b2sum-rust 0.1.0
[INFO] finished tweaking crates.io crate b2sum-rust 0.1.0
[INFO] tweaked toml for crates.io crate b2sum-rust 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate b2sum-rust 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+31ee872db5aae4750e3da1ca4ed1523c4356947f" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+31ee872db5aae4750e3da1ca4ed1523c4356947f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8682714f1c68ea1ce4e8bce820b3761ce55b5b891d7030c9129069de338d34f4
[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" "8682714f1c68ea1ce4e8bce820b3761ce55b5b891d7030c9129069de338d34f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8682714f1c68ea1ce4e8bce820b3761ce55b5b891d7030c9129069de338d34f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8682714f1c68ea1ce4e8bce820b3761ce55b5b891d7030c9129069de338d34f4", kill_on_drop: false }`
[INFO] [stdout] 8682714f1c68ea1ce4e8bce820b3761ce55b5b891d7030c9129069de338d34f4
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+31ee872db5aae4750e3da1ca4ed1523c4356947f" "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] 9dd0d5854c085f27fae6ec3ca8ac8905878ebcf0fa88985ac8f9ae1f3bc0eb40
[INFO] running `Command { std: "docker" "start" "-a" "9dd0d5854c085f27fae6ec3ca8ac8905878ebcf0fa88985ac8f9ae1f3bc0eb40", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking constant_time_eq v0.1.4
[INFO] [stderr]     Checking hex v0.4.0
[INFO] [stderr]     Checking blake2-rfc v0.2.18
[INFO] [stderr]     Checking filebuffer v0.4.0
[INFO] [stderr]     Checking b2sum-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.22s
[INFO] running `Command { std: "docker" "inspect" "9dd0d5854c085f27fae6ec3ca8ac8905878ebcf0fa88985ac8f9ae1f3bc0eb40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dd0d5854c085f27fae6ec3ca8ac8905878ebcf0fa88985ac8f9ae1f3bc0eb40", kill_on_drop: false }`
[INFO] [stdout] 9dd0d5854c085f27fae6ec3ca8ac8905878ebcf0fa88985ac8f9ae1f3bc0eb40