[INFO] fetching crate hello_exercism 0.5.5...
[INFO] checking hello_exercism-0.5.5 against master#4fa76a4a7742bb9c1febe33019f5a9e7e4839a65 for pr-83744
[INFO] extracting crate hello_exercism 0.5.5 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate hello_exercism 0.5.5 on toolchain 4fa76a4a7742bb9c1febe33019f5a9e7e4839a65
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hello_exercism 0.5.5
[INFO] finished tweaking crates.io crate hello_exercism 0.5.5
[INFO] tweaked toml for crates.io crate hello_exercism 0.5.5 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate hello_exercism 0.5.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e286ba2b2456fcb113f0f6a0fe7dcf75fe6cc175a153e00d6f44126c18d06075
[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" "e286ba2b2456fcb113f0f6a0fe7dcf75fe6cc175a153e00d6f44126c18d06075", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e286ba2b2456fcb113f0f6a0fe7dcf75fe6cc175a153e00d6f44126c18d06075", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e286ba2b2456fcb113f0f6a0fe7dcf75fe6cc175a153e00d6f44126c18d06075", kill_on_drop: false }`
[INFO] [stdout] e286ba2b2456fcb113f0f6a0fe7dcf75fe6cc175a153e00d6f44126c18d06075
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ace696213d6504285fbb62f689bf1f98b18eb4ed3954ffe14cc308b02d99dd9
[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" "2ace696213d6504285fbb62f689bf1f98b18eb4ed3954ffe14cc308b02d99dd9", kill_on_drop: false }`
[INFO] [stderr]     Checking hello_extern v0.1.1
[INFO] [stderr]     Checking hello_exercism v0.5.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "2ace696213d6504285fbb62f689bf1f98b18eb4ed3954ffe14cc308b02d99dd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ace696213d6504285fbb62f689bf1f98b18eb4ed3954ffe14cc308b02d99dd9", kill_on_drop: false }`
[INFO] [stdout] 2ace696213d6504285fbb62f689bf1f98b18eb4ed3954ffe14cc308b02d99dd9