[INFO] fetching crate multiproof-rs 0.1.9...
[INFO] documenting multiproof-rs-0.1.9 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate multiproof-rs 0.1.9 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate multiproof-rs 0.1.9 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 multiproof-rs 0.1.9
[INFO] finished tweaking crates.io crate multiproof-rs 0.1.9
[INFO] tweaked toml for crates.io crate multiproof-rs 0.1.9 written to /workspace/builds/worker-8/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 54d7c51016fa8cd31231e01a5f8815fcc7181faf1d21ad17bc1060d7a816d786
[INFO] running `Command { std: "docker" "start" "-a" "54d7c51016fa8cd31231e01a5f8815fcc7181faf1d21ad17bc1060d7a816d786", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54d7c51016fa8cd31231e01a5f8815fcc7181faf1d21ad17bc1060d7a816d786", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54d7c51016fa8cd31231e01a5f8815fcc7181faf1d21ad17bc1060d7a816d786", kill_on_drop: false }`
[INFO] [stdout] 54d7c51016fa8cd31231e01a5f8815fcc7181faf1d21ad17bc1060d7a816d786
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] e2d4e7bce7655f3ee62b6f70319a037c456d84e2c2c513f3965197d6c2226844
[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" "e2d4e7bce7655f3ee62b6f70319a037c456d84e2c2c513f3965197d6c2226844", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.45
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]     Checking half v1.6.0
[INFO] [stderr]     Checking keccak v0.1.0
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking rlp v0.4.6
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking sha3 v0.8.2
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking serde_cbor v0.10.2
[INFO] [stderr]  Documenting multiproof-rs v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax, box_patterns)]
[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 `multiproof-rs`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name multiproof_rs 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 hex=/opt/rustwide/target/debug/deps/libhex-b38b297ae8f34fd9.rmeta --extern rlp=/opt/rustwide/target/debug/deps/librlp-6e40aaa4abf88c17.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-2566fd4b02fef410.rmeta --extern serde_cbor=/opt/rustwide/target/debug/deps/libserde_cbor-910fe9a21b3b3083.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-6fb93fe0f20d1b1f.rmeta --extern sha3=/opt/rustwide/target/debug/deps/libsha3-05fab9aeece0e740.rmeta --cap-lints=warn --crate-version 0.1.9` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "e2d4e7bce7655f3ee62b6f70319a037c456d84e2c2c513f3965197d6c2226844", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2d4e7bce7655f3ee62b6f70319a037c456d84e2c2c513f3965197d6c2226844", kill_on_drop: false }`
[INFO] [stdout] e2d4e7bce7655f3ee62b6f70319a037c456d84e2c2c513f3965197d6c2226844
