[INFO] fetching crate datafu 0.0.7...
[INFO] documenting datafu-0.0.7 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate datafu 0.0.7 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate datafu 0.0.7 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate datafu 0.0.7
[INFO] finished tweaking crates.io crate datafu 0.0.7
[INFO] tweaked toml for crates.io crate datafu 0.0.7 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe9714e277269ddb083707b9b6677f1b0c2c5aabc84a86e76c1a6c776c8d91d7
[INFO] running `Command { std: "docker" "start" "-a" "fe9714e277269ddb083707b9b6677f1b0c2c5aabc84a86e76c1a6c776c8d91d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe9714e277269ddb083707b9b6677f1b0c2c5aabc84a86e76c1a6c776c8d91d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe9714e277269ddb083707b9b6677f1b0c2c5aabc84a86e76c1a6c776c8d91d7", kill_on_drop: false }`
[INFO] [stdout] fe9714e277269ddb083707b9b6677f1b0c2c5aabc84a86e76c1a6c776c8d91d7
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44a40fb219be77e18a805c52d320a6f5cfaafaae7a30b6f6b9c0c0a15ac4cda1
[INFO] running `Command { std: "docker" "start" "-a" "44a40fb219be77e18a805c52d320a6f5cfaafaae7a30b6f6b9c0c0a15ac4cda1", kill_on_drop: false }`
[INFO] [stderr]     Checking totally-safe-transmute v0.0.3
[INFO] [stderr]  Documenting datafu v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:19:38
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![cfg_attr(not(feature = "stable"), feature(label_break_value))]
[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 `datafu`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name datafu 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 regex=/opt/rustwide/target/debug/deps/libregex-46bf5b535d6b6b09.rmeta --extern totally_safe_transmute=/opt/rustwide/target/debug/deps/libtotally_safe_transmute-d31af2b4beda5295.rmeta --cap-lints=warn --crate-version 0.0.7` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "44a40fb219be77e18a805c52d320a6f5cfaafaae7a30b6f6b9c0c0a15ac4cda1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44a40fb219be77e18a805c52d320a6f5cfaafaae7a30b6f6b9c0c0a15ac4cda1", kill_on_drop: false }`
[INFO] [stdout] 44a40fb219be77e18a805c52d320a6f5cfaafaae7a30b6f6b9c0c0a15ac4cda1
