[INFO] fetching crate aktoro-channel 0.1.0-alpha.8...
[INFO] checking aktoro-channel-0.1.0-alpha.8 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate aktoro-channel 0.1.0-alpha.8 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate aktoro-channel 0.1.0-alpha.8 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate aktoro-channel 0.1.0-alpha.8
[INFO] finished tweaking crates.io crate aktoro-channel 0.1.0-alpha.8
[INFO] tweaked toml for crates.io crate aktoro-channel 0.1.0-alpha.8 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded romio v0.3.0-alpha.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4d950a82b912772d575405cf052519c081cbbe5afbd466ffddff3c248552fa1b
[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" "4d950a82b912772d575405cf052519c081cbbe5afbd466ffddff3c248552fa1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4d950a82b912772d575405cf052519c081cbbe5afbd466ffddff3c248552fa1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d950a82b912772d575405cf052519c081cbbe5afbd466ffddff3c248552fa1b", kill_on_drop: false }`
[INFO] [stdout] 4d950a82b912772d575405cf052519c081cbbe5afbd466ffddff3c248552fa1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--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] ddcc41fce34cea9d9ca80471f76ce952096372b43eb3442f2c2e1ca4b8f76770
[INFO] running `Command { std: "docker" "start" "-a" "ddcc41fce34cea9d9ca80471f76ce952096372b43eb3442f2c2e1ca4b8f76770", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]     Checking async-datagram v3.0.0
[INFO] [stderr]     Checking async-ready v3.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking aktoro-channel v0.1.0-alpha.8 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking futures-timer v0.3.0
[INFO] [stderr]     Checking juliex v0.3.0-alpha.8
[INFO] [stderr]     Checking romio v0.3.0-alpha.10
[INFO] [stderr]     Checking runtime-raw v0.3.0-alpha.5
[INFO] [stderr]     Checking runtime-native v0.3.0-alpha.6
[INFO] [stderr]    Compiling runtime-attributes v0.3.0-alpha.6
[INFO] [stderr]     Checking runtime v0.3.0-alpha.7
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.72s
[INFO] running `Command { std: "docker" "inspect" "ddcc41fce34cea9d9ca80471f76ce952096372b43eb3442f2c2e1ca4b8f76770", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddcc41fce34cea9d9ca80471f76ce952096372b43eb3442f2c2e1ca4b8f76770", kill_on_drop: false }`
[INFO] [stdout] ddcc41fce34cea9d9ca80471f76ce952096372b43eb3442f2c2e1ca4b8f76770