[INFO] cloning repository https://github.com/albgp22/AdventOfCode2021
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/albgp22/AdventOfCode2021" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falbgp22%2FAdventOfCode2021", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falbgp22%2FAdventOfCode2021'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 319706f5c86d560b1ed263545538f862eccf8685
[INFO] documenting albgp22/AdventOfCode2021 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falbgp22%2FAdventOfCode2021" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/albgp22/AdventOfCode2021 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/albgp22/AdventOfCode2021
[INFO] finished tweaking git repo https://github.com/albgp22/AdventOfCode2021
[INFO] tweaked toml for git repo https://github.com/albgp22/AdventOfCode2021 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/albgp22/AdventOfCode2021 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded papergrid v0.8.2
[INFO] [stderr]   Downloaded tabled v0.11.1
[INFO] [stderr]   Downloaded lpsolve-sys v5.5.0
[INFO] [stderr]   Downloaded lpsolve v0.1.0
[INFO] [stderr]   Downloaded json_to_table v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 43dbeda0ddb776bc2bdd75982b0922aee4817a906547ed246d9c9a8836c18cec
[INFO] running `Command { std: "docker" "start" "-a" "43dbeda0ddb776bc2bdd75982b0922aee4817a906547ed246d9c9a8836c18cec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43dbeda0ddb776bc2bdd75982b0922aee4817a906547ed246d9c9a8836c18cec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43dbeda0ddb776bc2bdd75982b0922aee4817a906547ed246d9c9a8836c18cec", kill_on_drop: false }`
[INFO] [stdout] 43dbeda0ddb776bc2bdd75982b0922aee4817a906547ed246d9c9a8836c18cec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a5cc2a60ce3cba71b49c697deb22124bfde94192f283cacfeccad72d12f80e0c
[INFO] running `Command { std: "docker" "start" "-a" "a5cc2a60ce3cba71b49c697deb22124bfde94192f283cacfeccad72d12f80e0c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling io-lifetimes v1.0.9
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling rustix v0.36.11
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling rustix v0.37.7
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]    Compiling ahash v0.8.3
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking linux-raw-sys v0.3.6
[INFO] [stderr]     Checking bytecount v0.6.3
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]    Compiling priority-queue v1.3.1
[INFO] [stderr]     Checking bitflags v0.5.0
[INFO] [stderr]     Checking papergrid v0.8.2
[INFO] [stderr]     Checking os_str_bytes v6.5.0
[INFO] [stderr]     Checking clap_lex v0.3.3
[INFO] [stderr]     Checking regex v1.7.3
[INFO] [stderr]     Checking bitflags v2.0.2
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking array_tool v1.0.3
[INFO] [stderr]     Checking queues v1.1.0
[INFO] [stderr]     Checking hashbrown v0.13.2
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]    Compiling lpsolve-sys v5.5.0
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]     Checking tabled v0.11.1
[INFO] [stderr]    Compiling syn v2.0.15
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]     Checking num-complex v0.4.3
[INFO] [stderr]     Checking num-bigint v0.4.3
[INFO] [stderr]     Checking num-rational v0.4.1
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
[INFO] [stderr]    Compiling serde_derive v1.0.160
[INFO] [stderr]     Checking is-terminal v0.4.5
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking tempfile v3.5.0
[INFO] [stderr]    Compiling clap_derive v4.1.9
[INFO] [stderr]     Checking json_to_table v0.4.0
[INFO] [stderr]     Checking thiserror v1.0.40
[INFO] [stderr]     Checking filedescriptor v0.8.2
[INFO] [stderr]     Checking gag v1.0.0
[INFO] [stderr]     Checking clap v4.1.11
[INFO] [stderr]     Checking lpsolve v0.1.0
[INFO] [stderr]     Checking good_lp v1.4.0
[INFO] [stderr]  Documenting aoc21 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iter_next_chunk,iter_advance_by)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iter_next_chunk,iter_advance_by)]
[INFO] [stdout]   |                            ^^^^^^^^^^^^^^^
[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 `aoc21`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type bin --crate-name aoc21 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=fb9479c51c56bb41 -L dependency=/opt/rustwide/target/debug/deps --extern array_tool=/opt/rustwide/target/debug/deps/libarray_tool-de96a83eda5ca156.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-56027a672058406b.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-c1992d11df85ff1e.rmeta --extern gag=/opt/rustwide/target/debug/deps/libgag-a64a846151488bc3.rmeta --extern good_lp=/opt/rustwide/target/debug/deps/libgood_lp-de07e1a4c0af6d83.rmeta --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-225223a31f4591a0.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-73f2917953ed9790.rmeta --extern json_to_table=/opt/rustwide/target/debug/deps/libjson_to_table-344a5b4633bd64da.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-db3182d8979d3809.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-fd6aac33306fc4ce.rmeta --extern priority_queue=/opt/rustwide/target/debug/deps/libpriority_queue-9e3b5a2d1803e73b.rmeta --extern queues=/opt/rustwide/target/debug/deps/libqueues-e3cb15124b1d201d.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-4774c9fefb97309b.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-1c2f29f5d8141820.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-85ab29dce731df4f.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-da031b1f957bcfac.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "a5cc2a60ce3cba71b49c697deb22124bfde94192f283cacfeccad72d12f80e0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5cc2a60ce3cba71b49c697deb22124bfde94192f283cacfeccad72d12f80e0c", kill_on_drop: false }`
[INFO] [stdout] a5cc2a60ce3cba71b49c697deb22124bfde94192f283cacfeccad72d12f80e0c
