[INFO] fetching crate packed_simd_2 0.3.4...
[INFO] documenting packed_simd_2-0.3.4 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate packed_simd_2 0.3.4 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate packed_simd_2 0.3.4 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate packed_simd_2 0.3.4
[INFO] finished tweaking crates.io crate packed_simd_2 0.3.4
[INFO] tweaked toml for crates.io crate packed_simd_2 0.3.4 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bindgen v0.46.0
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.52
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.52
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.52
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.52
[INFO] [stderr]   Downloaded wasm-bindgen-webidl v0.2.52
[INFO] [stderr]   Downloaded core_arch v0.1.5
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.52
[INFO] [stderr]   Downloaded sleef-sys v0.1.2
[INFO] [stderr]   Downloaded js-sys v0.3.29
[INFO] [stderr]   Downloaded wasm-bindgen-test-macro v0.3.2
[INFO] [stderr]   Downloaded wasm-bindgen-test v0.3.2
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.2
[INFO] [stderr]   Downloaded web-sys v0.3.29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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-2020-10-09" "metadata" "--no-deps" "--format-version=1", 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] 0ddc575a66710fe646db1bfcac79c7e1db4be2d519a408d25d68bcd1dc5e38ea
[INFO] running `Command { std: "docker" "start" "-a" "0ddc575a66710fe646db1bfcac79c7e1db4be2d519a408d25d68bcd1dc5e38ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ddc575a66710fe646db1bfcac79c7e1db4be2d519a408d25d68bcd1dc5e38ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ddc575a66710fe646db1bfcac79c7e1db4be2d519a408d25d68bcd1dc5e38ea", kill_on_drop: false }`
[INFO] [stdout] 0ddc575a66710fe646db1bfcac79c7e1db4be2d519a408d25d68bcd1dc5e38ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f67752d08623f610e502a014b9d9a79a6c441bceb56f76a4fda98f94b128e8c
[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" "0f67752d08623f610e502a014b9d9a79a6c441bceb56f76a4fda98f94b128e8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.1.4
[INFO] [stderr]    Compiling packed_simd_2 v0.3.4 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting packed_simd_2 v0.3.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:202:1
[INFO] [stdout]     |
[INFO] [stdout] 202 | / #![feature(
[INFO] [stdout] 203 | |     repr_simd,
[INFO] [stdout] 204 | |     rustc_attrs,
[INFO] [stdout] 205 | |     const_fn,
[INFO] [stdout] ...   |
[INFO] [stdout] 215 | |     llvm_asm
[INFO] [stdout] 216 | | )]
[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 `packed_simd_2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name packed_simd_2 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 cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-b31c81520e08f43a.rmeta --extern libm=/opt/rustwide/target/debug/deps/liblibm-cbc70a94909da861.rmeta --cap-lints=warn --crate-version 0.3.4` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "0f67752d08623f610e502a014b9d9a79a6c441bceb56f76a4fda98f94b128e8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f67752d08623f610e502a014b9d9a79a6c441bceb56f76a4fda98f94b128e8c", kill_on_drop: false }`
[INFO] [stdout] 0f67752d08623f610e502a014b9d9a79a6c441bceb56f76a4fda98f94b128e8c
