[INFO] fetching crate energy 0.0.0...
[INFO] checking energy-0.0.0 against try#9cfe725f0995b018340c519db1b2f3cf8a7e0631 for pr-81174
[INFO] extracting crate energy 0.0.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate energy 0.0.0 on toolchain 9cfe725f0995b018340c519db1b2f3cf8a7e0631
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate energy 0.0.0
[INFO] finished tweaking crates.io crate energy 0.0.0
[INFO] tweaked toml for crates.io crate energy 0.0.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate energy 0.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "metadata" "--no-deps" "--format-version=1", 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] b20fd512c7e2509dbf99535f4d927e89246bf27436d39f84bcb7bc4cd4f943b2
[INFO] running `Command { std: "docker" "start" "-a" "b20fd512c7e2509dbf99535f4d927e89246bf27436d39f84bcb7bc4cd4f943b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b20fd512c7e2509dbf99535f4d927e89246bf27436d39f84bcb7bc4cd4f943b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b20fd512c7e2509dbf99535f4d927e89246bf27436d39f84bcb7bc4cd4f943b2", kill_on_drop: false }`
[INFO] [stdout] b20fd512c7e2509dbf99535f4d927e89246bf27436d39f84bcb7bc4cd4f943b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 83db4d0ddd3ee43c968ef270e951ae89c40f34f7fc05e9e33262d757c9057bdf
[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" "83db4d0ddd3ee43c968ef270e951ae89c40f34f7fc05e9e33262d757c9057bdf", kill_on_drop: false }`
[INFO] [stderr]     Checking energy v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "83db4d0ddd3ee43c968ef270e951ae89c40f34f7fc05e9e33262d757c9057bdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83db4d0ddd3ee43c968ef270e951ae89c40f34f7fc05e9e33262d757c9057bdf", kill_on_drop: false }`
[INFO] [stdout] 83db4d0ddd3ee43c968ef270e951ae89c40f34f7fc05e9e33262d757c9057bdf