[INFO] cloning repository https://github.com/caipre/tower-h2-tokio-run
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/caipre/tower-h2-tokio-run" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaipre%2Ftower-h2-tokio-run", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaipre%2Ftower-h2-tokio-run'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0a89d311d9fd6c9039ca6e115a7dc76c30896072
[INFO] documenting caipre/tower-h2-tokio-run against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcaipre%2Ftower-h2-tokio-run" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/caipre/tower-h2-tokio-run on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/caipre/tower-h2-tokio-run
[INFO] finished tweaking git repo https://github.com/caipre/tower-h2-tokio-run
[INFO] tweaked toml for git repo https://github.com/caipre/tower-h2-tokio-run written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/caipre/tower-h2-tokio-run already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/tower-rs/tower-h2`
[INFO] [stderr]     Updating git repository `https://github.com/tower-rs/tower`
[INFO] [stderr]     Updating git repository `https://github.com/carllerche/tokio-connect`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f147f7b1269c8343a946abfcbc903c32c690718a2e91a37dbe44ec766ebdd1e9
[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" "f147f7b1269c8343a946abfcbc903c32c690718a2e91a37dbe44ec766ebdd1e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f147f7b1269c8343a946abfcbc903c32c690718a2e91a37dbe44ec766ebdd1e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f147f7b1269c8343a946abfcbc903c32c690718a2e91a37dbe44ec766ebdd1e9", kill_on_drop: false }`
[INFO] [stdout] f147f7b1269c8343a946abfcbc903c32c690718a2e91a37dbe44ec766ebdd1e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "RUSTDOCFLAGS=--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f8814c0caf1f09c62ef8536a0c1b27fc3865558caf1ff76bf8a0ba0c3cdf6ce0
[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" "f8814c0caf1f09c62ef8536a0c1b27fc3865558caf1ff76bf8a0ba0c3cdf6ce0", kill_on_drop: false }`
[INFO] [stderr]     Checking futures v0.1.23
[INFO] [stderr]     Checking itoa v0.4.2
[INFO] [stderr]     Checking log v0.4.4
[INFO] [stderr]     Checking bytes v0.4.9
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking mio v0.6.15
[INFO] [stderr]     Checking crossbeam-epoch v0.4.3
[INFO] [stderr]     Checking crossbeam-deque v0.3.1
[INFO] [stderr]     Checking http v0.1.10
[INFO] [stderr]     Checking tokio-io v0.1.7
[INFO] [stderr]     Checking tokio-executor v0.1.3
[INFO] [stderr]     Checking tower-service v0.1.0 (https://github.com/tower-rs/tower#aef25abf)
[INFO] [stderr]     Checking tokio-threadpool v0.1.5
[INFO] [stderr]     Checking tokio-timer v0.2.5
[INFO] [stderr]     Checking tokio-reactor v0.1.3
[INFO] [stderr]     Checking tokio-codec v0.1.0
[INFO] [stderr]     Checking tokio-connect v0.1.0 (https://github.com/carllerche/tokio-connect#f7ad1ca4)
[INFO] [stderr]     Checking tokio-udp v0.1.1
[INFO] [stderr]     Checking tokio-tcp v0.1.1
[INFO] [stderr]     Checking tokio-fs v0.1.3
[INFO] [stderr]     Checking tokio v0.1.7
[INFO] [stderr]     Checking h2 v0.1.12
[INFO] [stderr]     Checking tower-h2 v0.1.0 (https://github.com/tower-rs/tower-h2#1299be66)
[INFO] [stderr]  Documenting tower-h2-tokio-run v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.56s
[INFO] running `Command { std: "docker" "inspect" "f8814c0caf1f09c62ef8536a0c1b27fc3865558caf1ff76bf8a0ba0c3cdf6ce0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8814c0caf1f09c62ef8536a0c1b27fc3865558caf1ff76bf8a0ba0c3cdf6ce0", kill_on_drop: false }`
[INFO] [stdout] f8814c0caf1f09c62ef8536a0c1b27fc3865558caf1ff76bf8a0ba0c3cdf6ce0