[INFO] fetching crate javascript_lexer 0.1.8...
[INFO] documenting javascript_lexer-0.1.8 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate javascript_lexer 0.1.8 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate javascript_lexer 0.1.8 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 crates.io crate javascript_lexer 0.1.8
[INFO] finished tweaking crates.io crate javascript_lexer 0.1.8
[INFO] tweaked toml for crates.io crate javascript_lexer 0.1.8 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded internship v0.6.0
[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] ce89718857f2abb3344ca7bbf44c7f24b2fd328bf551bbde88e13b40bb87fc33
[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" "ce89718857f2abb3344ca7bbf44c7f24b2fd328bf551bbde88e13b40bb87fc33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce89718857f2abb3344ca7bbf44c7f24b2fd328bf551bbde88e13b40bb87fc33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce89718857f2abb3344ca7bbf44c7f24b2fd328bf551bbde88e13b40bb87fc33", kill_on_drop: false }`
[INFO] [stdout] ce89718857f2abb3344ca7bbf44c7f24b2fd328bf551bbde88e13b40bb87fc33
[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] 6052e53549f6d4bee202e17b4f9df6e8419152f20abab4d07eb3183338c6ce31
[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" "6052e53549f6d4bee202e17b4f9df6e8419152f20abab4d07eb3183338c6ce31", kill_on_drop: false }`
[INFO] [stderr]     Checking internship v0.6.0
[INFO] [stderr]    Compiling phf_macros v0.7.24
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]  Documenting javascript_lexer v0.1.8 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(const_fn, box_syntax, pattern, proc_macro_hygiene)]
[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 `javascript_lexer`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name javascript_lexer src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern internship=/opt/rustwide/target/debug/deps/libinternship-3169733f5a6ed91a.rmeta --extern phf=/opt/rustwide/target/debug/deps/libphf-ce4fea05d972847d.rmeta --cap-lints=warn --crate-version 0.1.8` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "6052e53549f6d4bee202e17b4f9df6e8419152f20abab4d07eb3183338c6ce31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6052e53549f6d4bee202e17b4f9df6e8419152f20abab4d07eb3183338c6ce31", kill_on_drop: false }`
[INFO] [stdout] 6052e53549f6d4bee202e17b4f9df6e8419152f20abab4d07eb3183338c6ce31