[INFO] fetching crate lucky 0.0.0...
[INFO] checking lucky-0.0.0 against try#55b3f428b4fac6790b1e8492e0b91ff2d80aec7c for pr-77035
[INFO] extracting crate lucky 0.0.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate lucky 0.0.0 on toolchain 55b3f428b4fac6790b1e8492e0b91ff2d80aec7c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lucky 0.0.0
[INFO] finished tweaking crates.io crate lucky 0.0.0
[INFO] tweaked toml for crates.io crate lucky 0.0.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate lucky 0.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 72405233fa8f4bd2934afe1f75e02ee33f4a5acee7ea09a6a73e21aeac60f692
[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" "72405233fa8f4bd2934afe1f75e02ee33f4a5acee7ea09a6a73e21aeac60f692", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72405233fa8f4bd2934afe1f75e02ee33f4a5acee7ea09a6a73e21aeac60f692", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72405233fa8f4bd2934afe1f75e02ee33f4a5acee7ea09a6a73e21aeac60f692", kill_on_drop: false }`
[INFO] [stdout] 72405233fa8f4bd2934afe1f75e02ee33f4a5acee7ea09a6a73e21aeac60f692
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c36e03c849385c6eaaff54ce6d6a58720b45c08064d26a89310576dd2824421a
[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" "c36e03c849385c6eaaff54ce6d6a58720b45c08064d26a89310576dd2824421a", kill_on_drop: false }`
[INFO] [stderr]     Checking lucky v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "c36e03c849385c6eaaff54ce6d6a58720b45c08064d26a89310576dd2824421a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c36e03c849385c6eaaff54ce6d6a58720b45c08064d26a89310576dd2824421a", kill_on_drop: false }`
[INFO] [stdout] c36e03c849385c6eaaff54ce6d6a58720b45c08064d26a89310576dd2824421a