[INFO] fetching crate rcom 0.2.0...
[INFO] checking rcom-0.2.0 against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] extracting crate rcom 0.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rcom 0.2.0 on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rcom 0.2.0
[INFO] finished tweaking crates.io crate rcom 0.2.0
[INFO] tweaked toml for crates.io crate rcom 0.2.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate rcom 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] feef26bd380b82a9a1f66acc6c64439812f739f0aaf5666d7bf3cfa3d40d480d
[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" "feef26bd380b82a9a1f66acc6c64439812f739f0aaf5666d7bf3cfa3d40d480d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "feef26bd380b82a9a1f66acc6c64439812f739f0aaf5666d7bf3cfa3d40d480d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "feef26bd380b82a9a1f66acc6c64439812f739f0aaf5666d7bf3cfa3d40d480d", kill_on_drop: false }`
[INFO] [stdout] feef26bd380b82a9a1f66acc6c64439812f739f0aaf5666d7bf3cfa3d40d480d
[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" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "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] 8e0e11b2c69c5a75e4f8f42121757c4483b3e96a791c3cad05b130ebd498024e
[INFO] running `Command { std: "docker" "start" "-a" "8e0e11b2c69c5a75e4f8f42121757c4483b3e96a791c3cad05b130ebd498024e", kill_on_drop: false }`
[INFO] [stderr]     Checking ioctl-rs v0.1.6
[INFO] [stderr]     Checking termios v0.2.2
[INFO] [stderr]     Checking serial-core v0.4.0
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking serial-unix v0.4.0
[INFO] [stderr]     Checking serial v0.4.0
[INFO] [stderr]     Checking rcom v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.47s
[INFO] running `Command { std: "docker" "inspect" "8e0e11b2c69c5a75e4f8f42121757c4483b3e96a791c3cad05b130ebd498024e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e0e11b2c69c5a75e4f8f42121757c4483b3e96a791c3cad05b130ebd498024e", kill_on_drop: false }`
[INFO] [stdout] 8e0e11b2c69c5a75e4f8f42121757c4483b3e96a791c3cad05b130ebd498024e