[INFO] cloning repository https://github.com/boardwalk/oneshot_crash
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/boardwalk/oneshot_crash" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboardwalk%2Foneshot_crash", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboardwalk%2Foneshot_crash'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 403aebd8c914d080d82b85265e98ca5bd9c409df
[INFO] documenting boardwalk/oneshot_crash 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%2Fboardwalk%2Foneshot_crash" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/boardwalk/oneshot_crash 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/boardwalk/oneshot_crash
[INFO] finished tweaking git repo https://github.com/boardwalk/oneshot_crash
[INFO] tweaked toml for git repo https://github.com/boardwalk/oneshot_crash written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/boardwalk/oneshot_crash 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]  Downloading crates ...
[INFO] [stderr]   Downloaded wepoll-sys-stjepang v1.0.6
[INFO] [stderr]   Downloaded polling v0.1.5
[INFO] [stderr]   Downloaded num_cpus v1.13.0
[INFO] [stderr]   Downloaded smol v0.3.3
[INFO] [stderr]   Downloaded proc-macro-nested v0.1.6
[INFO] [stderr]   Downloaded async-executor v0.1.2
[INFO] [stderr]   Downloaded futures-macro v0.3.5
[INFO] [stderr]   Downloaded atomic-waker v1.0.0
[INFO] [stderr]   Downloaded async-channel v1.4.0
[INFO] [stderr]   Downloaded waker-fn v1.0.0
[INFO] [stderr]   Downloaded anyhow v1.0.32
[INFO] [stderr]   Downloaded futures-io v0.3.5
[INFO] [stderr]   Downloaded cache-padded v1.1.1
[INFO] [stderr]   Downloaded blocking v0.5.2
[INFO] [stderr]   Downloaded async-io v0.1.11
[INFO] [stderr]   Downloaded multitask v0.2.0
[INFO] [stderr]   Downloaded parking v1.0.6
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.18
[INFO] [stderr]   Downloaded syn v1.0.39
[INFO] [stderr]   Downloaded async-task v3.0.0
[INFO] [stderr]   Downloaded futures-lite v0.1.11
[INFO] [stderr]   Downloaded concurrent-queue v1.2.2
[INFO] [stderr]   Downloaded event-listener v2.4.0
[INFO] [stderr]   Downloaded hermit-abi v0.1.15
[INFO] [stderr]   Downloaded parking v2.0.0
[INFO] [stderr]   Downloaded scoped-tls v1.0.0
[INFO] [stderr]   Downloaded once_cell v1.4.1
[INFO] [stderr]   Downloaded easy-parallel v3.1.0
[INFO] [stderr]   Downloaded fastrand v1.3.4
[INFO] [stderr]   Downloaded vec-arena v0.5.2
[INFO] [stderr]   Downloaded async-oneshot v0.3.1
[INFO] [stderr]   Downloaded futures-micro v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 8348bbb70f5a3fbe7bcbbd6dc7b5f612393eab7cae5a8e0b1035ba799bac2861
[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" "8348bbb70f5a3fbe7bcbbd6dc7b5f612393eab7cae5a8e0b1035ba799bac2861", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8348bbb70f5a3fbe7bcbbd6dc7b5f612393eab7cae5a8e0b1035ba799bac2861", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8348bbb70f5a3fbe7bcbbd6dc7b5f612393eab7cae5a8e0b1035ba799bac2861", kill_on_drop: false }`
[INFO] [stdout] 8348bbb70f5a3fbe7bcbbd6dc7b5f612393eab7cae5a8e0b1035ba799bac2861
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] e3e31e6ae0ef6aadced144d6e81e0ddcfd09275c649ba0e2327f0d0990e6e2f8
[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" "e3e31e6ae0ef6aadced144d6e81e0ddcfd09275c649ba0e2327f0d0990e6e2f8", kill_on_drop: false }`
[INFO] [stderr]     Checking easy-parallel v3.1.0
[INFO] [stderr]     Checking futures-micro v0.2.0
[INFO] [stderr]     Checking async-channel v1.4.0
[INFO] [stderr]     Checking polling v0.1.5
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking async-oneshot v0.3.1
[INFO] [stderr]     Checking async-io v0.1.11
[INFO] [stderr]     Checking blocking v0.5.2
[INFO] [stderr]     Checking async-executor v0.1.2
[INFO] [stderr]     Checking smol v0.3.3
[INFO] [stderr]  Documenting oneshot_crash v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `oneshot_crash`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name oneshot_crash src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-23dff0c64805ed62.rmeta --extern async_oneshot=/opt/rustwide/target/debug/deps/libasync_oneshot-60423643269cd4bc.rmeta --extern futures_util=/opt/rustwide/target/debug/deps/libfutures_util-e8e9a73a7fc1a5a3.rmeta --extern smol=/opt/rustwide/target/debug/deps/libsmol-e537fe6d78523470.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "e3e31e6ae0ef6aadced144d6e81e0ddcfd09275c649ba0e2327f0d0990e6e2f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3e31e6ae0ef6aadced144d6e81e0ddcfd09275c649ba0e2327f0d0990e6e2f8", kill_on_drop: false }`
[INFO] [stdout] e3e31e6ae0ef6aadced144d6e81e0ddcfd09275c649ba0e2327f0d0990e6e2f8