[INFO] cloning repository https://github.com/LU15W1R7H/crawler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LU15W1R7H/crawler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLU15W1R7H%2Fcrawler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLU15W1R7H%2Fcrawler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 91e7998761a961579c975769fe7aeb15d6717ac1
[INFO] documenting LU15W1R7H/crawler 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%2FLU15W1R7H%2Fcrawler" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LU15W1R7H/crawler 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/LU15W1R7H/crawler
[INFO] finished tweaking git repo https://github.com/LU15W1R7H/crawler
[INFO] tweaked toml for git repo https://github.com/LU15W1R7H/crawler written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/LU15W1R7H/crawler 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]     Updating git repository `https://github.com/LU15W1R7H/lwirth-rs`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded siphasher v0.3.3
[INFO] [stderr]   Downloaded indicatif v0.14.0
[INFO] [stderr]   Downloaded pin-project-lite v0.1.6
[INFO] [stderr]   Downloaded terminal_size v0.1.12
[INFO] [stderr]   Downloaded console v0.11.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 355ce34b6c47031860ebf97c963fc8035971f31b7928047b4c0aa615ed793d52
[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" "355ce34b6c47031860ebf97c963fc8035971f31b7928047b4c0aa615ed793d52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "355ce34b6c47031860ebf97c963fc8035971f31b7928047b4c0aa615ed793d52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "355ce34b6c47031860ebf97c963fc8035971f31b7928047b4c0aa615ed793d52", kill_on_drop: false }`
[INFO] [stdout] 355ce34b6c47031860ebf97c963fc8035971f31b7928047b4c0aa615ed793d52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 32be0a2af9f510a2d1602e3516cec7189f3dec87028aedefc83e0be4ed7ba68a
[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" "32be0a2af9f510a2d1602e3516cec7189f3dec87028aedefc83e0be4ed7ba68a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.29
[INFO] [stderr]     Checking pin-project-lite v0.1.6
[INFO] [stderr]    Compiling eyre v0.4.2
[INFO] [stderr]    Compiling crawler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking lwirth-rs v0.1.0 (https://github.com/LU15W1R7H/lwirth-rs#1f6c2642)
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]     Checking termios v0.3.2
[INFO] [stderr]     Checking terminal_size v0.1.12
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking tracing-serde v0.1.1
[INFO] [stderr]     Checking string_cache v0.8.0
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking serde_json v1.0.53
[INFO] [stderr]     Checking color-backtrace v0.4.2
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking console v0.11.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]     Checking indicatif v0.14.0
[INFO] [stderr]     Checking tracing-subscriber v0.2.5
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]    Compiling pin-project-internal v0.4.17
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.8
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.19
[INFO] [stderr]     Checking tokio v0.2.21
[INFO] [stderr]     Checking thiserror v1.0.19
[INFO] [stderr]     Checking tracing v0.1.14
[INFO] [stderr]     Checking tracing-error v0.1.2
[INFO] [stderr]     Checking color-spantrace v0.1.1
[INFO] [stderr]     Checking pin-project v0.4.17
[INFO] [stderr]     Checking color-eyre v0.3.2
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]    Compiling markup5ever v0.10.0
[INFO] [stderr]     Checking h2 v0.2.5
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking hyper v0.13.6
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking reqwest v0.10.6
[INFO] [stderr]  Documenting crawler 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:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | #![feature(drain_filter)]
[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 `crawler`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name crawler 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 atty=/opt/rustwide/target/debug/deps/libatty-369ebddd32d06ee0.rmeta --extern bytes=/opt/rustwide/target/debug/deps/libbytes-698f4871cab58c10.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-a3ec8f9fa5e9fcf5.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-3d0d7091e0f3e580.rmeta --extern color_eyre=/opt/rustwide/target/debug/deps/libcolor_eyre-ee36ed0bfbaff4a7.rmeta --extern console=/opt/rustwide/target/debug/deps/libconsole-3a8e971fb9002f8c.rmeta --extern eyre=/opt/rustwide/target/debug/deps/libeyre-3d61f06543631c41.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-421d92a0ad0face9.rmeta --extern html5ever=/opt/rustwide/target/debug/deps/libhtml5ever-e80c37c3fa711976.rmeta --extern indicatif=/opt/rustwide/target/debug/deps/libindicatif-c16428f09d216ac0.rmeta --extern lwirth_rs=/opt/rustwide/target/debug/deps/liblwirth_rs-908fcfde3533ed28.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-caf3733445de11de.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-53e28adce495cc97.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-6400c31bd0105348.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-8ffac251c1d433f0.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-fd4edc4fe851603b.rmeta --extern tracing_error=/opt/rustwide/target/debug/deps/libtracing_error-ad37f7f87a5864c5.rmeta --extern tracing_futures=/opt/rustwide/target/debug/deps/libtracing_futures-084120375f56bd82.rmeta --extern tracing_subscriber=/opt/rustwide/target/debug/deps/libtracing_subscriber-86769695b0dd57e5.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-a4dd649c9596107e.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "32be0a2af9f510a2d1602e3516cec7189f3dec87028aedefc83e0be4ed7ba68a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32be0a2af9f510a2d1602e3516cec7189f3dec87028aedefc83e0be4ed7ba68a", kill_on_drop: false }`
[INFO] [stdout] 32be0a2af9f510a2d1602e3516cec7189f3dec87028aedefc83e0be4ed7ba68a