[INFO] fetching crate pkg6repo 0.0.1-placeholder...
[INFO] checking pkg6repo-0.0.1-placeholder against master#9503ea19edbf01b9435e80e17d60ce1b88390116 for pr-81782
[INFO] extracting crate pkg6repo 0.0.1-placeholder into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate pkg6repo 0.0.1-placeholder on toolchain 9503ea19edbf01b9435e80e17d60ce1b88390116
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pkg6repo 0.0.1-placeholder
[INFO] finished tweaking crates.io crate pkg6repo 0.0.1-placeholder
[INFO] tweaked toml for crates.io crate pkg6repo 0.0.1-placeholder written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate pkg6repo 0.0.1-placeholder already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd51935d541f9219bc5a69b56e9b1d75a6b81066f410e6d176af805f62036583
[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" "cd51935d541f9219bc5a69b56e9b1d75a6b81066f410e6d176af805f62036583", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd51935d541f9219bc5a69b56e9b1d75a6b81066f410e6d176af805f62036583", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd51935d541f9219bc5a69b56e9b1d75a6b81066f410e6d176af805f62036583", kill_on_drop: false }`
[INFO] [stdout] cd51935d541f9219bc5a69b56e9b1d75a6b81066f410e6d176af805f62036583
[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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40da27f4f9c705fe92197c52de582b9e05c1162e7475da1231bd814a7aa73187
[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" "40da27f4f9c705fe92197c52de582b9e05c1162e7475da1231bd814a7aa73187", kill_on_drop: false }`
[INFO] [stderr]     Checking pkg6repo v0.0.1-placeholder (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "40da27f4f9c705fe92197c52de582b9e05c1162e7475da1231bd814a7aa73187", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40da27f4f9c705fe92197c52de582b9e05c1162e7475da1231bd814a7aa73187", kill_on_drop: false }`
[INFO] [stdout] 40da27f4f9c705fe92197c52de582b9e05c1162e7475da1231bd814a7aa73187