[INFO] cloning repository https://github.com/SpaceEraser/english-wiki-frequency-list
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SpaceEraser/english-wiki-frequency-list" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpaceEraser%2Fenglish-wiki-frequency-list", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpaceEraser%2Fenglish-wiki-frequency-list'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c10f989dc1def1b2740c87b853ae4945879d6e1e
[INFO] documenting SpaceEraser/english-wiki-frequency-list against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpaceEraser%2Fenglish-wiki-frequency-list" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SpaceEraser/english-wiki-frequency-list on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SpaceEraser/english-wiki-frequency-list
[INFO] finished tweaking git repo https://github.com/SpaceEraser/english-wiki-frequency-list
[INFO] tweaked toml for git repo https://github.com/SpaceEraser/english-wiki-frequency-list written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/SpaceEraser/english-wiki-frequency-list already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0d860584e78a784fa8e60bab2c7ab0159d98f55bb5b09e9b4577c02d9fe307e
[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" "d0d860584e78a784fa8e60bab2c7ab0159d98f55bb5b09e9b4577c02d9fe307e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0d860584e78a784fa8e60bab2c7ab0159d98f55bb5b09e9b4577c02d9fe307e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0d860584e78a784fa8e60bab2c7ab0159d98f55bb5b09e9b4577c02d9fe307e", kill_on_drop: false }`
[INFO] [stdout] d0d860584e78a784fa8e60bab2c7ab0159d98f55bb5b09e9b4577c02d9fe307e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b874b8f5720d32f4cbb6b419aadf7ae691017fa4b023e9dccadbb24ff569db11
[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" "b874b8f5720d32f4cbb6b419aadf7ae691017fa4b023e9dccadbb24ff569db11", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling jemalloc-sys v0.3.2
[INFO] [stderr]    Compiling bzip2-sys v0.1.9+1.0.8
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking string_cache v0.8.0
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking indicatif v0.15.0
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking bzip2 v0.4.1
[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 selectors v0.22.0
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling cssparser v0.27.2
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling cssparser-macros v0.6.0
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling derive_more v0.99.9
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.1
[INFO] [stderr]     Checking clap v3.0.0-beta.1
[INFO] [stderr]    Compiling markup5ever v0.10.0
[INFO] [stderr]     Checking scraper v0.12.0
[INFO] [stderr]     Checking jemallocator v0.3.2
[INFO] [stderr]  Documenting english-wiki-frequency-list 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(pattern)]
[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 `english-wiki-frequency-list`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name english_wiki_frequency_list 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 bzip2=/opt/rustwide/target/debug/deps/libbzip2-d2d081fe6e507cf0.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-8ad6b43e3bb659cd.rmeta --extern fnv=/opt/rustwide/target/debug/deps/libfnv-eb40d7f241f41d96.rmeta --extern indicatif=/opt/rustwide/target/debug/deps/libindicatif-0d058166aec298e0.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-0b72e8ad65a84c6a.rmeta --extern jemallocator=/opt/rustwide/target/debug/deps/libjemallocator-5f194935b56b1184.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-c58510bef65a1529.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-0879519133e6417a.rmeta --extern roxmltree=/opt/rustwide/target/debug/deps/libroxmltree-7c1c430681276fec.rmeta --extern scraper=/opt/rustwide/target/debug/deps/libscraper-a5d15dcd5e1f466b.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "b874b8f5720d32f4cbb6b419aadf7ae691017fa4b023e9dccadbb24ff569db11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b874b8f5720d32f4cbb6b419aadf7ae691017fa4b023e9dccadbb24ff569db11", kill_on_drop: false }`
[INFO] [stdout] b874b8f5720d32f4cbb6b419aadf7ae691017fa4b023e9dccadbb24ff569db11
