[INFO] cloning repository https://github.com/nihilistkitten/miniml
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nihilistkitten/miniml" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnihilistkitten%2Fminiml", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnihilistkitten%2Fminiml'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f62c517ff31502a42e7d639c6ad62223ccde75cb
[INFO] documenting nihilistkitten/miniml against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnihilistkitten%2Fminiml" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nihilistkitten/miniml 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] removed /workspace/builds/worker-4/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/nihilistkitten/miniml
[INFO] finished tweaking git repo https://github.com/nihilistkitten/miniml
[INFO] tweaked toml for git repo https://github.com/nihilistkitten/miniml written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/nihilistkitten/miniml 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 73fcd2748fc73c394286ec9841f05771389ed8bfafb4fddc17e8751f7518b1f5
[INFO] running `Command { std: "docker" "start" "-a" "73fcd2748fc73c394286ec9841f05771389ed8bfafb4fddc17e8751f7518b1f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73fcd2748fc73c394286ec9841f05771389ed8bfafb4fddc17e8751f7518b1f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73fcd2748fc73c394286ec9841f05771389ed8bfafb4fddc17e8751f7518b1f5", kill_on_drop: false }`
[INFO] [stdout] 73fcd2748fc73c394286ec9841f05771389ed8bfafb4fddc17e8751f7518b1f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] dcaf09386a7cee21d9dedde3ae17d7656a4851951c2973c2533e92c39f223132
[INFO] running `Command { std: "docker" "start" "-a" "dcaf09386a7cee21d9dedde3ae17d7656a4851951c2973c2533e92c39f223132", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]     Checking ucd-trie v0.1.3
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]     Checking pest v2.1.3
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling pest_consume_macros v1.1.0
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]     Checking pest_consume v1.1.1
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]  Documenting miniml v0.1.0 (/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(box_patterns, box_syntax)]
[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] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `miniml`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name miniml src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=7d694f12a3fbee9b -L dependency=/opt/rustwide/target/debug/deps --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-701e134f05ff346a.rmeta --extern pest=/opt/rustwide/target/debug/deps/libpest-bd314b53b30bd25c.rmeta --extern pest_consume=/opt/rustwide/target/debug/deps/libpest_consume-be3c6cfa9e54cef2.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-e31003f77380c897.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "dcaf09386a7cee21d9dedde3ae17d7656a4851951c2973c2533e92c39f223132", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcaf09386a7cee21d9dedde3ae17d7656a4851951c2973c2533e92c39f223132", kill_on_drop: false }`
[INFO] [stdout] dcaf09386a7cee21d9dedde3ae17d7656a4851951c2973c2533e92c39f223132