[INFO] fetching crate ur20-modbus 0.4.0...
[INFO] checking ur20-modbus-0.4.0 against master#d62d3f7fa9a91d933213cc10e20e740608983f64 for pr-77015
[INFO] extracting crate ur20-modbus 0.4.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate ur20-modbus 0.4.0 on toolchain d62d3f7fa9a91d933213cc10e20e740608983f64
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ur20-modbus 0.4.0
[INFO] finished tweaking crates.io crate ur20-modbus 0.4.0
[INFO] tweaked toml for crates.io crate ur20-modbus 0.4.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate ur20-modbus 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ddf8ea4929a95b841d570ebd4f21812824c7d574e74d545d5f3af66fe606d3d6
[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" "ddf8ea4929a95b841d570ebd4f21812824c7d574e74d545d5f3af66fe606d3d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ddf8ea4929a95b841d570ebd4f21812824c7d574e74d545d5f3af66fe606d3d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddf8ea4929a95b841d570ebd4f21812824c7d574e74d545d5f3af66fe606d3d6", kill_on_drop: false }`
[INFO] [stdout] ddf8ea4929a95b841d570ebd4f21812824c7d574e74d545d5f3af66fe606d3d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e21f4a5bffcbed5c8d4eb4e163a74256beb2d7bb30ed65aeccd7c2f2a54186fc
[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" "e21f4a5bffcbed5c8d4eb4e163a74256beb2d7bb30ed65aeccd7c2f2a54186fc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking ur20 v0.5.1
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]     Checking tokio v0.2.13
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking tokio-modbus v0.4.0
[INFO] [stderr]     Checking ur20-modbus v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.50s
[INFO] running `Command { std: "docker" "inspect" "e21f4a5bffcbed5c8d4eb4e163a74256beb2d7bb30ed65aeccd7c2f2a54186fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e21f4a5bffcbed5c8d4eb4e163a74256beb2d7bb30ed65aeccd7c2f2a54186fc", kill_on_drop: false }`
[INFO] [stdout] e21f4a5bffcbed5c8d4eb4e163a74256beb2d7bb30ed65aeccd7c2f2a54186fc