[INFO] crate concurrency 4.20.1 is already in cache
[INFO] checking concurrency-4.20.1 against try#85cc1486e1f000dce4bb8e1b3cfab2b654b102a8 for pr-73323
[INFO] extracting crate concurrency 4.20.1 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate concurrency 4.20.1 on toolchain 85cc1486e1f000dce4bb8e1b3cfab2b654b102a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate concurrency 4.20.1
[INFO] finished tweaking crates.io crate concurrency 4.20.1
[INFO] tweaked toml for crates.io crate concurrency 4.20.1 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate concurrency 4.20.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2603912d1d750485fd389853be2832af656279cb41a0791a4647fb1bfeb4895f
[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" "2603912d1d750485fd389853be2832af656279cb41a0791a4647fb1bfeb4895f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2603912d1d750485fd389853be2832af656279cb41a0791a4647fb1bfeb4895f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2603912d1d750485fd389853be2832af656279cb41a0791a4647fb1bfeb4895f", kill_on_drop: false }`
[INFO] [stdout] 2603912d1d750485fd389853be2832af656279cb41a0791a4647fb1bfeb4895f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c26438ad173ed0e8c5c5522124d7cc3d53e5baa64393937ce743d3df39dc3f1
[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" "5c26438ad173ed0e8c5c5522124d7cc3d53e5baa64393937ce743d3df39dc3f1", kill_on_drop: false }`
[INFO] [stderr]     Checking concurrency v4.20.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "5c26438ad173ed0e8c5c5522124d7cc3d53e5baa64393937ce743d3df39dc3f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c26438ad173ed0e8c5c5522124d7cc3d53e5baa64393937ce743d3df39dc3f1", kill_on_drop: false }`
[INFO] [stdout] 5c26438ad173ed0e8c5c5522124d7cc3d53e5baa64393937ce743d3df39dc3f1