[INFO] fetching crate permutation-generator 0.1.1...
[INFO] documenting permutation-generator-0.1.1 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate permutation-generator 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate permutation-generator 0.1.1 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 permutation-generator 0.1.1
[INFO] finished tweaking crates.io crate permutation-generator 0.1.1
[INFO] tweaked toml for crates.io crate permutation-generator 0.1.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] d05135243474bc18245ca852a471263680e54929b06b7179062d30a2e5255800
[INFO] running `Command { std: "docker" "start" "-a" "d05135243474bc18245ca852a471263680e54929b06b7179062d30a2e5255800", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d05135243474bc18245ca852a471263680e54929b06b7179062d30a2e5255800", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d05135243474bc18245ca852a471263680e54929b06b7179062d30a2e5255800", kill_on_drop: false }`
[INFO] [stdout] d05135243474bc18245ca852a471263680e54929b06b7179062d30a2e5255800
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 01fce6837afa72fe6cdedfa0a0a001e7676afe929bd84e7d26f571de6079d02b
[INFO] running `Command { std: "docker" "start" "-a" "01fce6837afa72fe6cdedfa0a0a001e7676afe929bd84e7d26f571de6079d02b", kill_on_drop: false }`
[INFO] [stderr]     Checking bit-index v0.2.0
[INFO] [stderr]  Documenting permutation-generator v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(min_type_alias_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in favor of full type_alias_impl_trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]   --> src/permutation_generator/permutation_generator_16.rs:52:17
[INFO] [stdout]    |
[INFO] [stdout] 52 |     type Item = impl Iterator<Item = u8>;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]   --> src/permutation_generator/permutation_generator_32.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |     type Item = impl Iterator<Item = u8>;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]   --> src/permutation_generator/permutation_generator_8.rs:52:17
[INFO] [stdout]    |
[INFO] [stdout] 52 |     type Item = impl Iterator<Item = u8>;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `permutation-generator`
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] Some errors have detailed explanations: E0557, E0658.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name permutation_generator src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=9d8ad0b9938f9f43 -L dependency=/opt/rustwide/target/debug/deps --extern bit_index=/opt/rustwide/target/debug/deps/libbit_index-3cc09f6037245433.rmeta --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] [stdout] For more information about an error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "01fce6837afa72fe6cdedfa0a0a001e7676afe929bd84e7d26f571de6079d02b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01fce6837afa72fe6cdedfa0a0a001e7676afe929bd84e7d26f571de6079d02b", kill_on_drop: false }`
[INFO] [stdout] 01fce6837afa72fe6cdedfa0a0a001e7676afe929bd84e7d26f571de6079d02b