[INFO] cloning repository https://github.com/pickx/aoc_2021
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pickx/aoc_2021" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpickx%2Faoc_2021", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpickx%2Faoc_2021'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e208c9ef679485ef5d8aeb286a00f4ae1140a8dd
[INFO] documenting pickx/aoc_2021 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%2Fpickx%2Faoc_2021" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pickx/aoc_2021 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/pickx/aoc_2021
[INFO] finished tweaking git repo https://github.com/pickx/aoc_2021
[INFO] tweaked toml for git repo https://github.com/pickx/aoc_2021 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/pickx/aoc_2021 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]  Downloading crates ...
[INFO] [stderr]   Downloaded structmeta-derive v0.1.4
[INFO] [stderr]   Downloaded scan_fmt v0.2.6
[INFO] [stderr]   Downloaded parse-display-derive v0.5.3
[INFO] [stderr]   Downloaded parse-display v0.5.3
[INFO] [stderr]   Downloaded structmeta v0.1.4
[INFO] [stderr]   Downloaded snowflake v1.3.0
[INFO] [stderr]   Downloaded priority-queue v1.2.1
[INFO] [stderr]   Downloaded slab_tree v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 8523dcbbbe2396dc4c355e2d4bc1c15e34c73fb7436f9445921763e3bf00db87
[INFO] running `Command { std: "docker" "start" "-a" "8523dcbbbe2396dc4c355e2d4bc1c15e34c73fb7436f9445921763e3bf00db87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8523dcbbbe2396dc4c355e2d4bc1c15e34c73fb7436f9445921763e3bf00db87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8523dcbbbe2396dc4c355e2d4bc1c15e34c73fb7436f9445921763e3bf00db87", kill_on_drop: false }`
[INFO] [stdout] 8523dcbbbe2396dc4c355e2d4bc1c15e34c73fb7436f9445921763e3bf00db87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] a06a6b3b33bbd51e671847fb500b8896f7683c8be93e065e1eb57b7fb8a010c1
[INFO] running `Command { std: "docker" "start" "-a" "a06a6b3b33bbd51e671847fb500b8896f7683c8be93e065e1eb57b7fb8a010c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling libc v0.2.109
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking snowflake v1.3.0
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling priority-queue v1.2.1
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]     Checking scan_fmt v0.2.6
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stderr]     Checking slab_tree v0.3.2
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking ndarray v0.15.4
[INFO] [stderr]    Compiling structmeta-derive v0.1.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling structmeta v0.1.4
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]    Compiling parse-display-derive v0.5.3
[INFO] [stderr]     Checking parse-display v0.5.3
[INFO] [stderr]  Documenting aoc_2021 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(hash_drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(int_abs_diff)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[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 `aoc_2021`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type bin --crate-name aoc_2021 src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=35e4e98833b7c16b -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-2b51f40009cfbc32.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-768244cffa2ddad5.rmeta --extern ndarray=/opt/rustwide/target/debug/deps/libndarray-09a69bb6e847d72b.rmeta --extern parse_display=/opt/rustwide/target/debug/deps/libparse_display-95a72d0ee4d44537.rmeta --extern priority_queue=/opt/rustwide/target/debug/deps/libpriority_queue-2347446252300fb9.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-5be417555eb433d4.rmeta --extern scan_fmt=/opt/rustwide/target/debug/deps/libscan_fmt-259081c8325f9d42.rmeta --extern slab_tree=/opt/rustwide/target/debug/deps/libslab_tree-3ae8935fce44a854.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-634e353b9dba14cd.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "a06a6b3b33bbd51e671847fb500b8896f7683c8be93e065e1eb57b7fb8a010c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a06a6b3b33bbd51e671847fb500b8896f7683c8be93e065e1eb57b7fb8a010c1", kill_on_drop: false }`
[INFO] [stdout] a06a6b3b33bbd51e671847fb500b8896f7683c8be93e065e1eb57b7fb8a010c1