[INFO] fetching crate minutiae 0.12.2...
[INFO] documenting minutiae-0.12.2 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate minutiae 0.12.2 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate minutiae 0.12.2 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 minutiae 0.12.2
[INFO] finished tweaking crates.io crate minutiae 0.12.2
[INFO] tweaked toml for crates.io crate minutiae 0.12.2 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 wasm-bindgen-macro-support v0.2.47
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.47
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.47
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.47
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.47
[INFO] [stderr]   Downloaded websocket v0.20.4
[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] 97d5190b5a434b78bda16fed87fa2273f53b952bb9cc2fbb8559647a983e5f4d
[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" "97d5190b5a434b78bda16fed87fa2273f53b952bb9cc2fbb8559647a983e5f4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97d5190b5a434b78bda16fed87fa2273f53b952bb9cc2fbb8559647a983e5f4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97d5190b5a434b78bda16fed87fa2273f53b952bb9cc2fbb8559647a983e5f4d", kill_on_drop: false }`
[INFO] [stdout] 97d5190b5a434b78bda16fed87fa2273f53b952bb9cc2fbb8559647a983e5f4d
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 56e767cb456667b5345e5663dfcf1aa0d69a9bbbca0212af9cb70ba2e2d0a63d
[INFO] running `Command { std: "docker" "start" "-a" "56e767cb456667b5345e5663dfcf1aa0d69a9bbbca0212af9cb70ba2e2d0a63d", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]  Documenting minutiae v0.12.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout] 4  | / #![feature(
[INFO] [stdout] 5  | |     associated_type_defaults,
[INFO] [stdout] 6  | |     box_syntax,
[INFO] [stdout] 7  | |     core_intrinsics,
[INFO] [stdout] ...  |
[INFO] [stdout] 14 | |     const_transmute
[INFO] [stdout] 15 | | )]
[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 `minutiae`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name minutiae 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 futures=/opt/rustwide/target/debug/deps/libfutures-f6a782863e1804d0.rmeta --extern gif=/opt/rustwide/target/debug/deps/libgif-6a8bbae6a595cbe4.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-b111a25c016345dd.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3c099bea820a9d53.rmeta --extern rand_pcg=/opt/rustwide/target/debug/deps/librand_pcg-b5d5789946b95c73.rmeta --extern slab=/opt/rustwide/target/debug/deps/libslab-e0e0e35ef9a5003f.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-38ac0278f87bfd5a.rmeta --cap-lints=warn --crate-version 0.12.2` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "56e767cb456667b5345e5663dfcf1aa0d69a9bbbca0212af9cb70ba2e2d0a63d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56e767cb456667b5345e5663dfcf1aa0d69a9bbbca0212af9cb70ba2e2d0a63d", kill_on_drop: false }`
[INFO] [stdout] 56e767cb456667b5345e5663dfcf1aa0d69a9bbbca0212af9cb70ba2e2d0a63d