[INFO] fetching crate clucstr 1.1.91...
[INFO] documenting clucstr-1.1.91 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate clucstr 1.1.91 into /workspace/builds/worker-92/source
[INFO] validating manifest of crates.io crate clucstr 1.1.91 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate clucstr 1.1.91
[INFO] finished tweaking crates.io crate clucstr 1.1.91
[INFO] tweaked toml for crates.io crate clucstr 1.1.91 written to /workspace/builds/worker-92/source/Cargo.toml
[INFO] crate crates.io crate clucstr 1.1.91 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "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-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 84121d75a4d393f8ad50af07c8580b9be107480b074425200ad969b3fdd09e3a
[INFO] running `Command { std: "docker" "start" "-a" "84121d75a4d393f8ad50af07c8580b9be107480b074425200ad969b3fdd09e3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "84121d75a4d393f8ad50af07c8580b9be107480b074425200ad969b3fdd09e3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84121d75a4d393f8ad50af07c8580b9be107480b074425200ad969b3fdd09e3a", kill_on_drop: false }`
[INFO] [stdout] 84121d75a4d393f8ad50af07c8580b9be107480b074425200ad969b3fdd09e3a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cfede31fea09a086701c118a0d163ec221232f57f76f26d5529a13168aaa0444
[INFO] running `Command { std: "docker" "start" "-a" "cfede31fea09a086701c118a0d163ec221232f57f76f26d5529a13168aaa0444", kill_on_drop: false }`
[INFO] [stderr]  Documenting clucstr v1.1.91 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> src/lib.rs:195:12
[INFO] [stdout]     |
[INFO] [stdout] 195 | #![feature(plugin_registrar, rustc_private)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: a __rustc_plugin_registrar symbol must now be defined instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `syntax`
[INFO] [stdout]    --> src/lib.rs:198:1
[INFO] [stdout]     |
[INFO] [stdout] 198 | extern crate syntax;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `rustc_driver`
[INFO] [stdout]    --> src/lib.rs:199:1
[INFO] [stdout]     |
[INFO] [stdout] 199 | extern crate rustc_driver;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe you need to install the missing components with: `rustup component add rust-src rustc-dev llvm-tools-preview`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `plugin_registrar` in this scope
[INFO] [stdout]   --> src/nightly.rs:22:3
[INFO] [stdout]    |
[INFO] [stdout] 22 | #[plugin_registrar]
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `plugin_registrar` is in scope, but it is a function, not an attribute
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:195:1
[INFO] [stdout]     |
[INFO] [stdout] 195 | #![feature(plugin_registrar, rustc_private)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `clucstr`
[INFO] [stdout] Some errors have detailed explanations: E0463, E0554, E0557.
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type dylib --crate-name clucstr src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=6f77b12a248f56bf -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 1.1.91` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "cfede31fea09a086701c118a0d163ec221232f57f76f26d5529a13168aaa0444", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cfede31fea09a086701c118a0d163ec221232f57f76f26d5529a13168aaa0444", kill_on_drop: false }`
[INFO] [stdout] cfede31fea09a086701c118a0d163ec221232f57f76f26d5529a13168aaa0444