[INFO] fetching crate anchors 0.6.0...
[INFO] documenting anchors-0.6.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate anchors 0.6.0 into /workspace/builds/worker-70/source
[INFO] validating manifest of crates.io crate anchors 0.6.0 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 anchors 0.6.0
[INFO] finished tweaking crates.io crate anchors 0.6.0
[INFO] tweaked toml for crates.io crate anchors 0.6.0 written to /workspace/builds/worker-70/source/Cargo.toml
[INFO] crate crates.io crate anchors 0.6.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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] 82b649398985fc29df4a44812ad5a4e83191271663b983776215db89052bdbf6
[INFO] running `Command { std: "docker" "start" "-a" "82b649398985fc29df4a44812ad5a4e83191271663b983776215db89052bdbf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82b649398985fc29df4a44812ad5a4e83191271663b983776215db89052bdbf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82b649398985fc29df4a44812ad5a4e83191271663b983776215db89052bdbf6", kill_on_drop: false }`
[INFO] [stdout] 82b649398985fc29df4a44812ad5a4e83191271663b983776215db89052bdbf6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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] bd604f0995759fb06a8e5cd4c3efdc9e76f005daee71885ba60f2761940776a8
[INFO] running `Command { std: "docker" "start" "-a" "bd604f0995759fb06a8e5cd4c3efdc9e76f005daee71885ba60f2761940776a8", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking typed-arena v2.0.1
[INFO] [stderr]     Checking arena-graph v0.1.0
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]    Compiling im v15.0.0
[INFO] [stderr]     Checking bitmaps v2.1.0
[INFO] [stderr]     Checking sized-chunks v0.6.4
[INFO] [stderr]  Documenting anchors v0.6.0 (/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(negative_impls)]
[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] [stderr] error: could not document `anchors`
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name anchors src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=6dc44230a9869bff -L dependency=/opt/rustwide/target/debug/deps --extern arena_graph=/opt/rustwide/target/debug/deps/libarena_graph-c03a6ee3dad61fd2.rmeta --extern im=/opt/rustwide/target/debug/deps/libim-75515fa4bb2ee391.rmeta --extern typed_arena=/opt/rustwide/target/debug/deps/libtyped_arena-a8c468712b894138.rmeta --cap-lints=warn --crate-version 0.6.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "bd604f0995759fb06a8e5cd4c3efdc9e76f005daee71885ba60f2761940776a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd604f0995759fb06a8e5cd4c3efdc9e76f005daee71885ba60f2761940776a8", kill_on_drop: false }`
[INFO] [stdout] bd604f0995759fb06a8e5cd4c3efdc9e76f005daee71885ba60f2761940776a8