[INFO] fetching crate concurrency 4.20.1...
[INFO] testing concurrency-4.20.1 against 1.60.0 for beta-1.61-1
[INFO] extracting crate concurrency 4.20.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate concurrency 4.20.1 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-9/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" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "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] 01ddaf578110f4f87bbf4d0415cbdd73f8efc83d83efe367e2b6afbc4651074d
[INFO] running `Command { std: "docker" "start" "-a" "01ddaf578110f4f87bbf4d0415cbdd73f8efc83d83efe367e2b6afbc4651074d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01ddaf578110f4f87bbf4d0415cbdd73f8efc83d83efe367e2b6afbc4651074d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01ddaf578110f4f87bbf4d0415cbdd73f8efc83d83efe367e2b6afbc4651074d", kill_on_drop: false }`
[INFO] [stdout] 01ddaf578110f4f87bbf4d0415cbdd73f8efc83d83efe367e2b6afbc4651074d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", 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] 9446f03f93fe0dddefc0ede8d2c7ccb0e0e082ca08b77c38030c53751fde4823
[INFO] running `Command { std: "docker" "start" "-a" "9446f03f93fe0dddefc0ede8d2c7ccb0e0e082ca08b77c38030c53751fde4823", kill_on_drop: false }`
[INFO] [stderr]    Compiling concurrency v4.20.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `Command { std: "docker" "inspect" "9446f03f93fe0dddefc0ede8d2c7ccb0e0e082ca08b77c38030c53751fde4823", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9446f03f93fe0dddefc0ede8d2c7ccb0e0e082ca08b77c38030c53751fde4823", kill_on_drop: false }`
[INFO] [stdout] 9446f03f93fe0dddefc0ede8d2c7ccb0e0e082ca08b77c38030c53751fde4823
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", 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] ff00c22a14a2c1f337c28e2721e7fcf2e9ba09127a7edd3605c2d38c3b029a39
[INFO] running `Command { std: "docker" "start" "-a" "ff00c22a14a2c1f337c28e2721e7fcf2e9ba09127a7edd3605c2d38c3b029a39", kill_on_drop: false }`
[INFO] [stderr]    Compiling concurrency v4.20.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `Command { std: "docker" "inspect" "ff00c22a14a2c1f337c28e2721e7fcf2e9ba09127a7edd3605c2d38c3b029a39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff00c22a14a2c1f337c28e2721e7fcf2e9ba09127a7edd3605c2d38c3b029a39", kill_on_drop: false }`
[INFO] [stdout] ff00c22a14a2c1f337c28e2721e7fcf2e9ba09127a7edd3605c2d38c3b029a39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", 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] 2da235ee30624bd1bca0d1f6bf4d74ed86dcadf4c0558423fc703f100e7181a9
[INFO] running `Command { std: "docker" "start" "-a" "2da235ee30624bd1bca0d1f6bf4d74ed86dcadf4c0558423fc703f100e7181a9", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/concurrency-0533b5a2e25e2f3f)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2da235ee30624bd1bca0d1f6bf4d74ed86dcadf4c0558423fc703f100e7181a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2da235ee30624bd1bca0d1f6bf4d74ed86dcadf4c0558423fc703f100e7181a9", kill_on_drop: false }`
[INFO] [stdout] 2da235ee30624bd1bca0d1f6bf4d74ed86dcadf4c0558423fc703f100e7181a9