[INFO] cloning repository https://github.com/risboo6909/aoc2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/risboo6909/aoc2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frisboo6909%2Faoc2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frisboo6909%2Faoc2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ca565fcdb401ac2e736693b78be702b7deb97bc6
[INFO] documenting risboo6909/aoc2020 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%2Frisboo6909%2Faoc2020" "/workspace/builds/worker-19/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-19/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/risboo6909/aoc2020 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/risboo6909/aoc2020
[INFO] finished tweaking git repo https://github.com/risboo6909/aoc2020
[INFO] tweaked toml for git repo https://github.com/risboo6909/aoc2020 written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] crate git repo https://github.com/risboo6909/aoc2020 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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] 94206e053dace15f35f649acd3866f5e476386eb7de80f12f54c47652f5300b9
[INFO] running `Command { std: "docker" "start" "-a" "94206e053dace15f35f649acd3866f5e476386eb7de80f12f54c47652f5300b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94206e053dace15f35f649acd3866f5e476386eb7de80f12f54c47652f5300b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94206e053dace15f35f649acd3866f5e476386eb7de80f12f54c47652f5300b9", kill_on_drop: false }`
[INFO] [stdout] 94206e053dace15f35f649acd3866f5e476386eb7de80f12f54c47652f5300b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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] caf768d62014b8deaa956ee16619c33b398607dd23ef898af658d4fe77feacdb
[INFO] running `Command { std: "docker" "start" "-a" "caf768d62014b8deaa956ee16619c33b398607dd23ef898af658d4fe77feacdb", 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]    Compiling libc v0.2.85
[INFO] [stderr]    Compiling const_fn v0.4.5
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking object v0.23.0
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]     Checking weezl v0.1.4
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking bytemuck v1.5.0
[INFO] [stderr]     Checking permutohedron v0.2.4
[INFO] [stderr]     Checking prefix-tree v0.5.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]     Checking addr2line v0.14.1
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking miniz_oxide v0.3.7
[INFO] [stderr]     Checking deflate v0.8.6
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking gif v0.11.1
[INFO] [stderr]     Checking png v0.16.8
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking backtrace v0.3.56
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking tiff v0.6.1
[INFO] [stderr]     Checking image v0.23.13
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking utils v0.1.0 (/opt/rustwide/workdir/utils)
[INFO] [stderr]  Documenting utils v0.1.0 (/opt/rustwide/workdir/utils)
[INFO] [stderr]  Documenting problems v0.1.0 (/opt/rustwide/workdir/problems)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> problems/src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_option)]
[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 `problems`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name problems problems/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=15b0d5e290b4e37b -L dependency=/opt/rustwide/target/debug/deps --extern colored=/opt/rustwide/target/debug/deps/libcolored-f468060218b8087d.rmeta --extern crossbeam=/opt/rustwide/target/debug/deps/libcrossbeam-9a99dbc038261286.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-bdfc7d7d3ece6fc8.rmeta --extern fxhash=/opt/rustwide/target/debug/deps/libfxhash-15842947e260cff8.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-caf6e2582d5b6cbf.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-66d91c8db82d9763.rmeta --extern num_integer=/opt/rustwide/target/debug/deps/libnum_integer-2411fe6985481f9d.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-4c10db87cc92560d.rmeta --extern permutohedron=/opt/rustwide/target/debug/deps/libpermutohedron-eedf44540e8246ab.rmeta --extern prefix_tree=/opt/rustwide/target/debug/deps/libprefix_tree-2ba1fbd856cab7f1.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3c672b859d75d9e8.rmeta --extern utils=/opt/rustwide/target/debug/deps/libutils-9ca3eb64c736ca1b.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "caf768d62014b8deaa956ee16619c33b398607dd23ef898af658d4fe77feacdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "caf768d62014b8deaa956ee16619c33b398607dd23ef898af658d4fe77feacdb", kill_on_drop: false }`
[INFO] [stdout] caf768d62014b8deaa956ee16619c33b398607dd23ef898af658d4fe77feacdb