[INFO] cloning repository https://github.com/BMourtzis/test-tokio
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BMourtzis/test-tokio" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBMourtzis%2Ftest-tokio", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBMourtzis%2Ftest-tokio'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9294df3d7bbd3bf7c74bf08f241f9bcf4e590f26
[INFO] documenting BMourtzis/test-tokio against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBMourtzis%2Ftest-tokio" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BMourtzis/test-tokio on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/BMourtzis/test-tokio
[INFO] finished tweaking git repo https://github.com/BMourtzis/test-tokio
[INFO] tweaked toml for git repo https://github.com/BMourtzis/test-tokio written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/BMourtzis/test-tokio already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9f42e03a20220ebdfb8a501727e1cbb553501d268c9c04d2a9debd5cf094d2a0
[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" "9f42e03a20220ebdfb8a501727e1cbb553501d268c9c04d2a9debd5cf094d2a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9f42e03a20220ebdfb8a501727e1cbb553501d268c9c04d2a9debd5cf094d2a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f42e03a20220ebdfb8a501727e1cbb553501d268c9c04d2a9debd5cf094d2a0", kill_on_drop: false }`
[INFO] [stdout] 9f42e03a20220ebdfb8a501727e1cbb553501d268c9c04d2a9debd5cf094d2a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--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] 49804d2eb3763e90ee0ffed6e850d6f6cf7f48058c049b19842de6c745082096
[INFO] running `Command { std: "docker" "start" "-a" "49804d2eb3763e90ee0ffed6e850d6f6cf7f48058c049b19842de6c745082096", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio v0.3.5
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking parking_lot_core v0.8.1
[INFO] [stderr]     Checking mio v0.7.6
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking atoi v0.3.3
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling tokio-macros v0.3.1
[INFO] [stderr]    Compiling async-stream-impl v0.2.1
[INFO] [stderr]     Checking tracing v0.1.22
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking async-stream v0.2.1
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking futures-executor v0.3.8
[INFO] [stderr]     Checking futures v0.3.8
[INFO] [stderr]     Checking serde v1.0.117
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking serde_json v1.0.60
[INFO] [stderr]     Checking tracing-subscriber v0.2.15
[INFO] [stderr]     Checking mini-redis v0.3.0
[INFO] [stderr]  Documenting test-tokio v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.33s
[INFO] running `Command { std: "docker" "inspect" "49804d2eb3763e90ee0ffed6e850d6f6cf7f48058c049b19842de6c745082096", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49804d2eb3763e90ee0ffed6e850d6f6cf7f48058c049b19842de6c745082096", kill_on_drop: false }`
[INFO] [stdout] 49804d2eb3763e90ee0ffed6e850d6f6cf7f48058c049b19842de6c745082096