[INFO] cloning repository https://github.com/aatifsyed/advent-of-code-2021
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aatifsyed/advent-of-code-2021" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faatifsyed%2Fadvent-of-code-2021", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faatifsyed%2Fadvent-of-code-2021'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8ad2b3954b44e557e485b2ccc4c8efba74fe9d00
[INFO] documenting aatifsyed/advent-of-code-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%2Faatifsyed%2Fadvent-of-code-2021" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aatifsyed/advent-of-code-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] removed /workspace/builds/worker-14/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/aatifsyed/advent-of-code-2021
[INFO] finished tweaking git repo https://github.com/aatifsyed/advent-of-code-2021
[INFO] tweaked toml for git repo https://github.com/aatifsyed/advent-of-code-2021 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/aatifsyed/advent-of-code-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded envy v0.4.2
[INFO] [stderr]   Downloaded rstar v0.8.4
[INFO] [stderr]   Downloaded recap-derive v0.1.1
[INFO] [stderr]   Downloaded recap v0.1.1
[INFO] [stderr]   Downloaded grid v0.6.0
[INFO] [stderr]   Downloaded geo-types v0.7.2
[INFO] [stderr]   Downloaded no-std-compat v0.4.1
[INFO] [stderr]   Downloaded geographiclib-rs v0.2.0
[INFO] [stderr]   Downloaded array2d v0.2.1
[INFO] [stderr]   Downloaded geo v0.18.0
[INFO] [stderr]   Downloaded benchtest v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] ee6c725ff192fccc7c97a0db251aef6d335ce27f3437bced1dc1945a9c59d07a
[INFO] running `Command { std: "docker" "start" "-a" "ee6c725ff192fccc7c97a0db251aef6d335ce27f3437bced1dc1945a9c59d07a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee6c725ff192fccc7c97a0db251aef6d335ce27f3437bced1dc1945a9c59d07a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee6c725ff192fccc7c97a0db251aef6d335ce27f3437bced1dc1945a9c59d07a", kill_on_drop: false }`
[INFO] [stdout] ee6c725ff192fccc7c97a0db251aef6d335ce27f3437bced1dc1945a9c59d07a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 2a866bc65d64d9046e08284840d8698b617fc5739cd5c2042b2520eff8a8f952
[INFO] running `Command { std: "docker" "start" "-a" "2a866bc65d64d9046e08284840d8698b617fc5739cd5c2042b2520eff8a8f952", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling typenum v1.14.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling heapless v0.6.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking smallvec v1.7.0
[INFO] [stderr]     Checking pdqselect v0.1.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking robust v0.2.3
[INFO] [stderr]     Checking no-std-compat v0.4.1
[INFO] [stderr]     Checking array2d v0.2.1
[INFO] [stderr]     Checking benchtest v0.1.1
[INFO] [stderr]     Checking strum v0.23.0
[INFO] [stderr]     Checking geographiclib-rs v0.2.0
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking hash32 v0.1.1
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stderr]     Checking grid v0.6.0
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking generic-array v0.12.4
[INFO] [stderr]     Checking generic-array v0.13.3
[INFO] [stderr]     Checking as-slice v0.1.5
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking approx v0.4.0
[INFO] [stderr]     Checking rstar v0.8.4
[INFO] [stderr]     Checking ndarray v0.15.4
[INFO] [stderr]     Checking geo-types v0.7.2
[INFO] [stderr]     Checking geo v0.18.0
[INFO] [stderr]    Compiling recap-derive v0.1.1
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking envy v0.4.2
[INFO] [stderr]     Checking recap v0.1.1
[INFO] [stderr]  Documenting advent-of-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / #![feature(
[INFO] [stdout] 3  | |     bool_to_option,
[INFO] [stdout] 4  | |     hash_drain_filter,
[INFO] [stdout] 5  | |     if_let_guard,
[INFO] [stdout] ...  |
[INFO] [stdout] 10 | |     try_blocks
[INFO] [stdout] 11 | | )]
[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 `advent-of-code`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name advent_of_code src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=355575e243d71103 -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-2b51f40009cfbc32.rmeta --extern array2d=/opt/rustwide/target/debug/deps/libarray2d-67ec5696597ae318.rmeta --extern benchtest=/opt/rustwide/target/debug/deps/libbenchtest-c808442cc0e1e6e5.rmeta --extern derive_more=/opt/rustwide/target/debug/deps/libderive_more-858c2f8995b07782.so --extern geo=/opt/rustwide/target/debug/deps/libgeo-a470300871eae86c.rmeta --extern grid=/opt/rustwide/target/debug/deps/libgrid-26392b382e042301.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-768244cffa2ddad5.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-9bc12257f57dd5ae.rmeta --extern ndarray=/opt/rustwide/target/debug/deps/libndarray-56ba9f2eab2f121d.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-62654a9e0915dbad.rmeta --extern recap=/opt/rustwide/target/debug/deps/librecap-9b8a6f6d03bba24a.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-e28bb76fdee94d24.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-eaa28abc548b039a.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2a866bc65d64d9046e08284840d8698b617fc5739cd5c2042b2520eff8a8f952", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a866bc65d64d9046e08284840d8698b617fc5739cd5c2042b2520eff8a8f952", kill_on_drop: false }`
[INFO] [stdout] 2a866bc65d64d9046e08284840d8698b617fc5739cd5c2042b2520eff8a8f952