[INFO] cloning repository https://github.com/stefanoc/advent
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stefanoc/advent" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstefanoc%2Fadvent", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstefanoc%2Fadvent'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 856f78d921d2829f0809363d24d0351b3ea81657
[INFO] documenting stefanoc/advent 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%2Fstefanoc%2Fadvent" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stefanoc/advent 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 git repo https://github.com/stefanoc/advent
[INFO] finished tweaking git repo https://github.com/stefanoc/advent
[INFO] tweaked toml for git repo https://github.com/stefanoc/advent written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/stefanoc/advent 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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 465818c4a799d04d5972c5af394004605c4d96a87f542a8c5b6bbb7449404754
[INFO] running `Command { std: "docker" "start" "-a" "465818c4a799d04d5972c5af394004605c4d96a87f542a8c5b6bbb7449404754", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "465818c4a799d04d5972c5af394004605c4d96a87f542a8c5b6bbb7449404754", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "465818c4a799d04d5972c5af394004605c4d96a87f542a8c5b6bbb7449404754", kill_on_drop: false }`
[INFO] [stdout] 465818c4a799d04d5972c5af394004605c4d96a87f542a8c5b6bbb7449404754
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 384cf9c1f5a8ba437fe5c72c59eb9e28217fdfc02a8906bedc339f4f8e28e403
[INFO] running `Command { std: "docker" "start" "-a" "384cf9c1f5a8ba437fe5c72c59eb9e28217fdfc02a8906bedc339f4f8e28e403", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking permutohedron v0.2.1
[INFO] [stderr]     Checking md5 v0.1.1
[INFO] [stderr]     Checking iterslide v0.0.5
[INFO] [stderr]     Checking itertools v0.4.11
[INFO] [stderr]  Documenting advent v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/six.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |         (Self::locate(x0, y) .. Self::locate(x1, y) + 1)
[INFO] [stdout]    |         ^                                              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 45 -         (Self::locate(x0, y) .. Self::locate(x1, y) + 1)
[INFO] [stdout] 45 +         Self::locate(x0, y) .. Self::locate(x1, y) + 1
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(str_char)]
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `str_char`
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(str_char)]
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `advent`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name advent src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=1426f38f747f0417 -L dependency=/opt/rustwide/target/debug/deps --extern iterslide=/opt/rustwide/target/debug/deps/libiterslide-800e921c7b23ecf7.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-a71213be1a3ad77c.rmeta --extern md5=/opt/rustwide/target/debug/deps/libmd5-96ecca2e0c8567bf.rmeta --extern permutohedron=/opt/rustwide/target/debug/deps/libpermutohedron-f7855dd202349d01.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "384cf9c1f5a8ba437fe5c72c59eb9e28217fdfc02a8906bedc339f4f8e28e403", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "384cf9c1f5a8ba437fe5c72c59eb9e28217fdfc02a8906bedc339f4f8e28e403", kill_on_drop: false }`
[INFO] [stdout] 384cf9c1f5a8ba437fe5c72c59eb9e28217fdfc02a8906bedc339f4f8e28e403