[INFO] fetching crate web-glitz 0.1.1...
[INFO] documenting web-glitz-0.1.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate web-glitz 0.1.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate web-glitz 0.1.1 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 web-glitz 0.1.1
[INFO] finished tweaking crates.io crate web-glitz 0.1.1
[INFO] tweaked toml for crates.io crate web-glitz 0.1.1 written to /workspace/builds/worker-5/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 web-glitz-macros v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 29ae459541977cc9f154cb2095ea69adebdf12c55040c27d3e19a23d6f621793
[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" "29ae459541977cc9f154cb2095ea69adebdf12c55040c27d3e19a23d6f621793", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "29ae459541977cc9f154cb2095ea69adebdf12c55040c27d3e19a23d6f621793", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29ae459541977cc9f154cb2095ea69adebdf12c55040c27d3e19a23d6f621793", kill_on_drop: false }`
[INFO] [stdout] 29ae459541977cc9f154cb2095ea69adebdf12c55040c27d3e19a23d6f621793
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 8ecd68c79d1d170e60bf3bf3a28df5f1fc9fae6670100ac68e276b756360a6f6
[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" "8ecd68c79d1d170e60bf3bf3a28df5f1fc9fae6670100ac68e276b756360a6f6", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.67
[INFO] [stderr]    Compiling web-glitz-macros v0.1.0
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.67
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.67
[INFO] [stderr]     Checking wasm-bindgen v0.2.67
[INFO] [stderr]     Checking js-sys v0.3.44
[INFO] [stderr]     Checking web-sys v0.3.44
[INFO] [stderr]  Documenting web-glitz v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:29:1
[INFO] [stdout]    |
[INFO] [stdout] 29 | / #![feature(
[INFO] [stdout] 30 | |     coerce_unsized,
[INFO] [stdout] 31 | |     const_generics,
[INFO] [stdout] 32 | |     fn_traits,
[INFO] [stdout] ...  |
[INFO] [stdout] 35 | |     unsize
[INFO] [stdout] 36 | | )]
[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 `web-glitz`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name web_glitz src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern failure=/opt/rustwide/target/debug/deps/libfailure-db4f87b3cc078168.rmeta --extern fnv=/opt/rustwide/target/debug/deps/libfnv-0ff73feb7e2c43f7.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-65a574fbd5732cf0.rmeta --extern js_sys=/opt/rustwide/target/debug/deps/libjs_sys-aae8bc439169696d.rmeta --extern proc_macro_hack=/opt/rustwide/target/debug/deps/libproc_macro_hack-c11df22f0f9499f5.so --extern serde=/opt/rustwide/target/debug/deps/libserde-ec5e695d7e4b5284.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-39eb620c1185a1a0.so --extern wasm_bindgen=/opt/rustwide/target/debug/deps/libwasm_bindgen-d22f15a713561a34.rmeta --extern web_glitz_macros=/opt/rustwide/target/debug/deps/libweb_glitz_macros-1bc69183cdc12a9d.so --extern web_sys=/opt/rustwide/target/debug/deps/libweb_sys-49641e4ddfeea07d.rmeta --cap-lints=warn --crate-version 0.1.1` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "8ecd68c79d1d170e60bf3bf3a28df5f1fc9fae6670100ac68e276b756360a6f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ecd68c79d1d170e60bf3bf3a28df5f1fc9fae6670100ac68e276b756360a6f6", kill_on_drop: false }`
[INFO] [stdout] 8ecd68c79d1d170e60bf3bf3a28df5f1fc9fae6670100ac68e276b756360a6f6