[INFO] fetching crate io_utils 0.2.6...
[INFO] checking io_utils-0.2.6 against try#1c5262aa6c045a581fb974488793f09ed51fc498 for pr-78376
[INFO] extracting crate io_utils 0.2.6 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate io_utils 0.2.6 on toolchain 1c5262aa6c045a581fb974488793f09ed51fc498
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1c5262aa6c045a581fb974488793f09ed51fc498" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate io_utils 0.2.6
[INFO] finished tweaking crates.io crate io_utils 0.2.6
[INFO] tweaked toml for crates.io crate io_utils 0.2.6 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1c5262aa6c045a581fb974488793f09ed51fc498" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1c5262aa6c045a581fb974488793f09ed51fc498" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded permutation v0.2.5
[INFO] [stderr]   Downloaded superslice v1.0.0
[INFO] [stderr]   Downloaded vector_utils v0.1.3
[INFO] [stderr]   Downloaded string_utils v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+1c5262aa6c045a581fb974488793f09ed51fc498" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 56bc687549a8d959d894970965e89253c07e74a03ef2bf7753c6a054b629b77b
[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" "56bc687549a8d959d894970965e89253c07e74a03ef2bf7753c6a054b629b77b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "56bc687549a8d959d894970965e89253c07e74a03ef2bf7753c6a054b629b77b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56bc687549a8d959d894970965e89253c07e74a03ef2bf7753c6a054b629b77b", kill_on_drop: false }`
[INFO] [stdout] 56bc687549a8d959d894970965e89253c07e74a03ef2bf7753c6a054b629b77b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+1c5262aa6c045a581fb974488793f09ed51fc498" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fb7d5da9dca2f39c2a169fb3b6642d8fff793931d72c4a5fa60b7bb63738139e
[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" "fb7d5da9dca2f39c2a169fb3b6642d8fff793931d72c4a5fa60b7bb63738139e", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]     Checking superslice v1.0.0
[INFO] [stderr]     Checking permutation v0.2.5
[INFO] [stderr]    Compiling lz4-sys v1.9.2
[INFO] [stderr]     Checking vector_utils v0.1.3
[INFO] [stderr]     Checking string_utils v0.1.1
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking lz4 v1.23.2
[INFO] [stderr]     Checking io_utils v0.2.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.17s
[INFO] running `Command { std: "docker" "inspect" "fb7d5da9dca2f39c2a169fb3b6642d8fff793931d72c4a5fa60b7bb63738139e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb7d5da9dca2f39c2a169fb3b6642d8fff793931d72c4a5fa60b7bb63738139e", kill_on_drop: false }`
[INFO] [stdout] fb7d5da9dca2f39c2a169fb3b6642d8fff793931d72c4a5fa60b7bb63738139e