[INFO] cloning repository https://github.com/BlueDragon23/advent-of-code2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BlueDragon23/advent-of-code2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBlueDragon23%2Fadvent-of-code2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBlueDragon23%2Fadvent-of-code2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cbb29c6627dd7d2a8d43e92aab19c5a560eea634
[INFO] documenting BlueDragon23/advent-of-code2020 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBlueDragon23%2Fadvent-of-code2020" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BlueDragon23/advent-of-code2020 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/BlueDragon23/advent-of-code2020
[INFO] finished tweaking git repo https://github.com/BlueDragon23/advent-of-code2020
[INFO] tweaked toml for git repo https://github.com/BlueDragon23/advent-of-code2020 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/BlueDragon23/advent-of-code2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41673dd0dbd9cdb27ff44b4e3d9b89422106f80ba1a0ad144d15447dc6eebc25
[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" "41673dd0dbd9cdb27ff44b4e3d9b89422106f80ba1a0ad144d15447dc6eebc25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41673dd0dbd9cdb27ff44b4e3d9b89422106f80ba1a0ad144d15447dc6eebc25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41673dd0dbd9cdb27ff44b4e3d9b89422106f80ba1a0ad144d15447dc6eebc25", kill_on_drop: false }`
[INFO] [stdout] 41673dd0dbd9cdb27ff44b4e3d9b89422106f80ba1a0ad144d15447dc6eebc25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6fdaabb562b8f6fcb6d4d43ced58a0bc2a0e814923aa4b497daffc58eb698c07
[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" "6fdaabb562b8f6fcb6d4d43ced58a0bc2a0e814923aa4b497daffc58eb698c07", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]     Checking simple_logger v1.11.0
[INFO] [stderr]    Compiling reformation_derive v0.5.2
[INFO] [stderr]    Compiling derive_more v0.99.14
[INFO] [stderr]     Checking reformation v0.5.3
[INFO] [stderr]  Documenting advent-of-code2020 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/bin/day19.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iter_map_while)]
[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-code2020`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name day19 src/bin/day19.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern itertools=/opt/rustwide/target/debug/deps/libitertools-6738c699ae19a4d9.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f8abb66ffc16068c.rmeta --extern petgraph=/opt/rustwide/target/debug/deps/libpetgraph-28355f3edc7ea5f2.rmeta --extern reformation=/opt/rustwide/target/debug/deps/libreformation-1afc5dceb21a2850.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-46bf5b535d6b6b09.rmeta --extern simple_logger=/opt/rustwide/target/debug/deps/libsimple_logger-3cd0c46d5efb129f.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "6fdaabb562b8f6fcb6d4d43ced58a0bc2a0e814923aa4b497daffc58eb698c07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fdaabb562b8f6fcb6d4d43ced58a0bc2a0e814923aa4b497daffc58eb698c07", kill_on_drop: false }`
[INFO] [stdout] 6fdaabb562b8f6fcb6d4d43ced58a0bc2a0e814923aa4b497daffc58eb698c07
