[INFO] cloning repository https://github.com/dinoocch/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/dinoocch/aoc-2021" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdinoocch%2Faoc-2021", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdinoocch%2Faoc-2021'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e04cfad0764800b54eedbbb1d8e590cab162ceaf
[INFO] documenting dinoocch/aoc-2021 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%2Fdinoocch%2Faoc-2021" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dinoocch/aoc-2021 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/dinoocch/aoc-2021
[INFO] finished tweaking git repo https://github.com/dinoocch/aoc-2021
[INFO] tweaked toml for git repo https://github.com/dinoocch/aoc-2021 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/dinoocch/aoc-2021 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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] d963be00735fa6a8f55f9a5b6439dcd90dbb45ac7bf2d16403306722c87381d0
[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" "d963be00735fa6a8f55f9a5b6439dcd90dbb45ac7bf2d16403306722c87381d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d963be00735fa6a8f55f9a5b6439dcd90dbb45ac7bf2d16403306722c87381d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d963be00735fa6a8f55f9a5b6439dcd90dbb45ac7bf2d16403306722c87381d0", kill_on_drop: false }`
[INFO] [stdout] d963be00735fa6a8f55f9a5b6439dcd90dbb45ac7bf2d16403306722c87381d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 065e7e19db5a7490585f5393cdad8bc26f03cdc774536c4c4c475beb86f98679
[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" "065e7e19db5a7490585f5393cdad8bc26f03cdc774536c4c4c475beb86f98679", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]     Checking psl-types v2.0.9
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling tokio v1.14.0
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling standback v0.2.17
[INFO] [stderr]    Compiling time v0.2.27
[INFO] [stderr]    Compiling cookie v0.15.1
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]     Checking encoding_rs v0.8.29
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking socket2 v0.4.2
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking openssl-sys v0.9.71
[INFO] [stderr]     Checking tracing-core v0.1.21
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking http v0.2.5
[INFO] [stderr]     Checking publicsuffix v2.1.1
[INFO] [stderr]     Checking tracing v0.1.29
[INFO] [stderr]     Checking openssl v0.10.38
[INFO] [stderr]     Checking futures-util v0.3.18
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking http-body v0.4.4
[INFO] [stderr]     Checking native-tls v0.2.8
[INFO] [stderr]    Compiling time-macros-impl v0.1.2
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking tokio-util v0.6.9
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking h2 v0.3.7
[INFO] [stderr]     Checking hyper v0.14.15
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking serde_json v1.0.72
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking cookie_store v0.15.1
[INFO] [stderr]     Checking reqwest v0.11.7
[INFO] [stderr]  Documenting aoc-2021 v0.1.0 (/opt/rustwide/workdir)
[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(hash_drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[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 '-Arustdoc::private-intra-doc-links' -C metadata=dc41b80ec407ec62 -L dependency=/opt/rustwide/target/debug/deps --extern itertools=/opt/rustwide/target/debug/deps/libitertools-5dfc9fd0ade52842.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-701e134f05ff346a.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-93251fd65088a55f.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-f6d2ae790783e774.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "065e7e19db5a7490585f5393cdad8bc26f03cdc774536c4c4c475beb86f98679", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "065e7e19db5a7490585f5393cdad8bc26f03cdc774536c4c4c475beb86f98679", kill_on_drop: false }`
[INFO] [stdout] 065e7e19db5a7490585f5393cdad8bc26f03cdc774536c4c4c475beb86f98679