[INFO] fetching crate arguably 1.0.0...
[INFO] checking arguably-1.0.0 against master#c9228570668803e3e6402770d55f23a12c9ae686 for pr-79472
[INFO] extracting crate arguably 1.0.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate arguably 1.0.0 on toolchain c9228570668803e3e6402770d55f23a12c9ae686
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate arguably 1.0.0
[INFO] finished tweaking crates.io crate arguably 1.0.0
[INFO] tweaked toml for crates.io crate arguably 1.0.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate arguably 1.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+c9228570668803e3e6402770d55f23a12c9ae686" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b4d42ec407a34e32835f7d566a0bdd3ab33643a7a97940fc6e1032662169d0e
[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" "6b4d42ec407a34e32835f7d566a0bdd3ab33643a7a97940fc6e1032662169d0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b4d42ec407a34e32835f7d566a0bdd3ab33643a7a97940fc6e1032662169d0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b4d42ec407a34e32835f7d566a0bdd3ab33643a7a97940fc6e1032662169d0e", kill_on_drop: false }`
[INFO] [stdout] 6b4d42ec407a34e32835f7d566a0bdd3ab33643a7a97940fc6e1032662169d0e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+c9228570668803e3e6402770d55f23a12c9ae686" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d2bf559f98b4e4496ff6c6aa6ee53ef85ab38f3a1823dfe7897092fad89b7f82
[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" "d2bf559f98b4e4496ff6c6aa6ee53ef85ab38f3a1823dfe7897092fad89b7f82", kill_on_drop: false }`
[INFO] [stderr]     Checking arguably v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "d2bf559f98b4e4496ff6c6aa6ee53ef85ab38f3a1823dfe7897092fad89b7f82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2bf559f98b4e4496ff6c6aa6ee53ef85ab38f3a1823dfe7897092fad89b7f82", kill_on_drop: false }`
[INFO] [stdout] d2bf559f98b4e4496ff6c6aa6ee53ef85ab38f3a1823dfe7897092fad89b7f82