[INFO] fetching crate bzzz 1.0.0...
[INFO] documenting bzzz-1.0.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate bzzz 1.0.0 into /workspace/builds/worker-58/source
[INFO] validating manifest of crates.io crate bzzz 1.0.0 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bzzz 1.0.0
[INFO] finished tweaking crates.io crate bzzz 1.0.0
[INFO] tweaked toml for crates.io crate bzzz 1.0.0 written to /workspace/builds/worker-58/source/Cargo.toml
[INFO] crate crates.io crate bzzz 1.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b8b8601440014fe89e0ef4575b358843b4611c901d40a69563103f7d786c161d
[INFO] running `Command { std: "docker" "start" "-a" "b8b8601440014fe89e0ef4575b358843b4611c901d40a69563103f7d786c161d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b8b8601440014fe89e0ef4575b358843b4611c901d40a69563103f7d786c161d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8b8601440014fe89e0ef4575b358843b4611c901d40a69563103f7d786c161d", kill_on_drop: false }`
[INFO] [stdout] b8b8601440014fe89e0ef4575b358843b4611c901d40a69563103f7d786c161d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c334e3bcf98b0601132bb27048e8fc1cf86d757ff3b514a6641dd9d2f7ea59f9
[INFO] running `Command { std: "docker" "start" "-a" "c334e3bcf98b0601132bb27048e8fc1cf86d757ff3b514a6641dd9d2f7ea59f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]  Documenting bzzz v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(array_chunks)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `bzzz`
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name bzzz src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=1dd99164dbd2f361 -L dependency=/opt/rustwide/target/debug/deps --extern regex=/opt/rustwide/target/debug/deps/libregex-f583fade8d015eab.rmeta --cap-lints=warn --crate-version 1.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c334e3bcf98b0601132bb27048e8fc1cf86d757ff3b514a6641dd9d2f7ea59f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c334e3bcf98b0601132bb27048e8fc1cf86d757ff3b514a6641dd9d2f7ea59f9", kill_on_drop: false }`
[INFO] [stdout] c334e3bcf98b0601132bb27048e8fc1cf86d757ff3b514a6641dd9d2f7ea59f9