[INFO] cloning repository https://github.com/ray-kast/docbot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ray-kast/docbot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fray-kast%2Fdocbot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fray-kast%2Fdocbot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3432ccb093a0d95ec7829d8f509d3d155b31d808
[INFO] documenting ray-kast/docbot against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fray-kast%2Fdocbot" "/workspace/builds/worker-39/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-39/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ray-kast/docbot 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 git repo https://github.com/ray-kast/docbot
[INFO] finished tweaking git repo https://github.com/ray-kast/docbot
[INFO] tweaked toml for git repo https://github.com/ray-kast/docbot written to /workspace/builds/worker-39/source/Cargo.toml
[INFO] crate git repo https://github.com/ray-kast/docbot 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] warning: /workspace/builds/worker-39/source/src/docbot-derive/Cargo.toml: unused manifest key: package.category
[INFO] [stderr] warning: /workspace/builds/worker-39/source/src/docbot/Cargo.toml: unused manifest key: package.category
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.14
[INFO] [stderr]   Downloaded anyhow v1.0.52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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] 1168535f3e7f6a7d285e5806db88190cad53032a07c54586650cc7abb5a4d0d8
[INFO] running `Command { std: "docker" "start" "-a" "1168535f3e7f6a7d285e5806db88190cad53032a07c54586650cc7abb5a4d0d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1168535f3e7f6a7d285e5806db88190cad53032a07c54586650cc7abb5a4d0d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1168535f3e7f6a7d285e5806db88190cad53032a07c54586650cc7abb5a4d0d8", kill_on_drop: false }`
[INFO] [stdout] 1168535f3e7f6a7d285e5806db88190cad53032a07c54586650cc7abb5a4d0d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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] 087e178435f4cf696c9fc426f14ece5744418df7680a0af866bfcdb73ef3d7d7
[INFO] running `Command { std: "docker" "start" "-a" "087e178435f4cf696c9fc426f14ece5744418df7680a0af866bfcdb73ef3d7d7", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/src/docbot-derive/Cargo.toml: unused manifest key: package.category
[INFO] [stderr] warning: /opt/rustwide/workdir/src/docbot/Cargo.toml: unused manifest key: package.category
[INFO] [stderr]    Compiling syn v1.0.84
[INFO] [stderr]     Checking unicode-xid v0.2.2
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking anyhow v1.0.52
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]  Documenting docbot-derive v0.3.0-alpha.2 (/opt/rustwide/workdir/src/docbot-derive)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/docbot-derive/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(proc_macro_diagnostic)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `docbot-derive`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type proc-macro --crate-name docbot_derive src/docbot-derive/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=acd0f054aa2c9a45 -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-6acff3152a12ecf8.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-1479f2b7adeaa2b6.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-5653350d727f284c.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-365c0aebaef55978.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-01d9c5dc0d72cf1f.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-702634b4b9ade090.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.3.0-alpha.2` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "087e178435f4cf696c9fc426f14ece5744418df7680a0af866bfcdb73ef3d7d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "087e178435f4cf696c9fc426f14ece5744418df7680a0af866bfcdb73ef3d7d7", kill_on_drop: false }`
[INFO] [stdout] 087e178435f4cf696c9fc426f14ece5744418df7680a0af866bfcdb73ef3d7d7