[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 1.46.0 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-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LU15W1R7H/crawler on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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-12/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" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c81ecb3f712549de09f591c9e168b571ef924e13f8094446fac178b583918194
[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" "c81ecb3f712549de09f591c9e168b571ef924e13f8094446fac178b583918194", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c81ecb3f712549de09f591c9e168b571ef924e13f8094446fac178b583918194", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c81ecb3f712549de09f591c9e168b571ef924e13f8094446fac178b583918194", kill_on_drop: false }`
[INFO] [stdout] c81ecb3f712549de09f591c9e168b571ef924e13f8094446fac178b583918194
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b417aa5e890b0a9b0f75f2dd8d5dadc72c31110e3d3cbab15ee38204368a7bd
[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" "7b417aa5e890b0a9b0f75f2dd8d5dadc72c31110e3d3cbab15ee38204368a7bd", 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]     Checking indenter v0.3.0
[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]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking tracing-serde v0.1.1
[INFO] [stderr]    Compiling serde_json v1.0.53
[INFO] [stderr]     Checking color-backtrace v0.4.2
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking console v0.11.3
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking native-tls v0.2.4
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]     Checking indicatif v0.14.0
[INFO] [stderr]     Checking tracing-subscriber v0.2.5
[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]     Checking h2 v0.2.5
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]    Compiling markup5ever v0.10.0
[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 stable 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-6342e275cf1b87d5.rmeta --extern bytes=/opt/rustwide/target/debug/deps/libbytes-be87a6d7a821f35e.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-a042cd9362e73e85.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-3348e56d269dc66e.rmeta --extern color_eyre=/opt/rustwide/target/debug/deps/libcolor_eyre-e06187d92d27f00b.rmeta --extern console=/opt/rustwide/target/debug/deps/libconsole-3b91fbd35d65cad5.rmeta --extern eyre=/opt/rustwide/target/debug/deps/libeyre-6af3cb02a710de7a.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-8344bd7f738501cd.rmeta --extern html5ever=/opt/rustwide/target/debug/deps/libhtml5ever-21aa6c5cc72b3af3.rmeta --extern indicatif=/opt/rustwide/target/debug/deps/libindicatif-e7a16ebcec9b6b8c.rmeta --extern lwirth_rs=/opt/rustwide/target/debug/deps/liblwirth_rs-63f9a9138095c574.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-21e7b07feced65d1.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-93317934e4e398bf.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-023ddcd56a1156a2.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-3de519fd61e40056.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-6f5b337f01a1b630.rmeta --extern tracing_error=/opt/rustwide/target/debug/deps/libtracing_error-d00746b3c72b1766.rmeta --extern tracing_futures=/opt/rustwide/target/debug/deps/libtracing_futures-89b45ef07066e2c9.rmeta --extern tracing_subscriber=/opt/rustwide/target/debug/deps/libtracing_subscriber-a434f6e353e746d3.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-b2aad1a507f57997.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "7b417aa5e890b0a9b0f75f2dd8d5dadc72c31110e3d3cbab15ee38204368a7bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b417aa5e890b0a9b0f75f2dd8d5dadc72c31110e3d3cbab15ee38204368a7bd", kill_on_drop: false }`
[INFO] [stdout] 7b417aa5e890b0a9b0f75f2dd8d5dadc72c31110e3d3cbab15ee38204368a7bd