[INFO] cloning repository https://github.com/josephlr/rust-aoc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/josephlr/rust-aoc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjosephlr%2Frust-aoc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjosephlr%2Frust-aoc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2a2cfb653e80c78a3fb31635bcf8150d38dca939
[INFO] documenting josephlr/rust-aoc against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjosephlr%2Frust-aoc" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/josephlr/rust-aoc on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/josephlr/rust-aoc
[INFO] finished tweaking git repo https://github.com/josephlr/rust-aoc
[INFO] tweaked toml for git repo https://github.com/josephlr/rust-aoc written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/josephlr/rust-aoc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 26cb30a217919d6aae85075f5f14e775755b6b48e00020c0f654f7dd6e4bb0ea
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "26cb30a217919d6aae85075f5f14e775755b6b48e00020c0f654f7dd6e4bb0ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26cb30a217919d6aae85075f5f14e775755b6b48e00020c0f654f7dd6e4bb0ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26cb30a217919d6aae85075f5f14e775755b6b48e00020c0f654f7dd6e4bb0ea", kill_on_drop: false }`
[INFO] [stdout] 26cb30a217919d6aae85075f5f14e775755b6b48e00020c0f654f7dd6e4bb0ea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3498af5fc3f0894315853f5cc3fe3dbff476e5a58f45de9aabe5f0d72bd57e9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c3498af5fc3f0894315853f5cc3fe3dbff476e5a58f45de9aabe5f0d72bd57e9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]     Checking intrusive-collections v0.7.8
[INFO] [stderr]     Checking bit-vec v0.5.0
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking euclid v0.19.4
[INFO] [stderr]     Checking nom v4.1.1
[INFO] [stderr]  Documenting rust-aoc 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:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | / #![feature(
[INFO] [stdout] 2  | |     nll,
[INFO] [stdout] 3  | |     never_type,
[INFO] [stdout] 4  | |     specialization,
[INFO] [stdout] ...  |
[INFO] [stdout] 9  | |     try_trait
[INFO] [stdout] 10 | | )]
[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 `rust-aoc`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name rust_aoc src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bit_vec=/opt/rustwide/target/debug/deps/libbit_vec-cce040de693ea87e.rmeta --extern euclid=/opt/rustwide/target/debug/deps/libeuclid-9f3df894f6a82741.rmeta --extern intrusive_collections=/opt/rustwide/target/debug/deps/libintrusive_collections-83378038e58df533.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-c7fe82c4840fd78a.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-5dc9c50319564d58.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "c3498af5fc3f0894315853f5cc3fe3dbff476e5a58f45de9aabe5f0d72bd57e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3498af5fc3f0894315853f5cc3fe3dbff476e5a58f45de9aabe5f0d72bd57e9", kill_on_drop: false }`
[INFO] [stdout] c3498af5fc3f0894315853f5cc3fe3dbff476e5a58f45de9aabe5f0d72bd57e9