[INFO] cloning repository https://github.com/Aidiakapi/advent_of_code_2019
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Aidiakapi/advent_of_code_2019" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAidiakapi%2Fadvent_of_code_2019", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAidiakapi%2Fadvent_of_code_2019'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e387ea9764cf3ca0ee1c2ffb010d0b0b2c0b8d5b
[INFO] documenting Aidiakapi/advent_of_code_2019 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%2FAidiakapi%2Fadvent_of_code_2019" "/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/Aidiakapi/advent_of_code_2019 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/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/Aidiakapi/advent_of_code_2019
[INFO] finished tweaking git repo https://github.com/Aidiakapi/advent_of_code_2019
[INFO] tweaked toml for git repo https://github.com/Aidiakapi/advent_of_code_2019 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/Aidiakapi/advent_of_code_2019 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 const-random v0.1.13
[INFO] [stderr]   Downloaded openssl-sys v0.9.53
[INFO] [stderr]   Downloaded string_cache v0.8.0
[INFO] [stderr]   Downloaded tokio-executor v0.1.9
[INFO] [stderr]   Downloaded schannel v0.1.16
[INFO] [stderr]   Downloaded tokio-reactor v0.1.11
[INFO] [stderr]   Downloaded const-random-macro v0.1.13
[INFO] [stderr]   Downloaded syn v1.0.9
[INFO] [stderr]   Downloaded vcpkg v0.2.7
[INFO] [stderr]   Downloaded tokio-timer v0.2.12
[INFO] [stderr]   Downloaded http v0.1.20
[INFO] [stderr]   Downloaded cc v1.0.47
[INFO] [stderr]   Downloaded openssl v0.10.26
[INFO] [stderr]   Downloaded serde_json v1.0.42
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.16
[INFO] [stderr]   Downloaded siphasher v0.3.1
[INFO] [stderr]   Downloaded unicode-normalization v0.1.11
[INFO] [stderr]   Downloaded reqwest v0.9.22
[INFO] [stderr]   Downloaded thiserror-impl v1.0.6
[INFO] [stderr]   Downloaded thiserror v1.0.6
[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] a0a9f64379b8318156544c7fd418d268ff3029e1cf4fafeefadbb9c01d163868
[INFO] running `Command { std: "docker" "start" "-a" "a0a9f64379b8318156544c7fd418d268ff3029e1cf4fafeefadbb9c01d163868", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0a9f64379b8318156544c7fd418d268ff3029e1cf4fafeefadbb9c01d163868", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0a9f64379b8318156544c7fd418d268ff3029e1cf4fafeefadbb9c01d163868", kill_on_drop: false }`
[INFO] [stdout] a0a9f64379b8318156544c7fd418d268ff3029e1cf4fafeefadbb9c01d163868
[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] 801a178ea7483599208b1e2ef36b6aa5da552900ff54ea0570e57f434aa86ef1
[INFO] running `Command { std: "docker" "start" "-a" "801a178ea7483599208b1e2ef36b6aa5da552900ff54ea0570e57f434aa86ef1", 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 v0.2.66
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling syn v1.0.9
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling serde v1.0.103
[INFO] [stderr]     Checking siphasher v0.3.1
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking once_cell v1.9.0
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]     Checking arrayvec v0.7.2
[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 proc-macro-hack v0.5.19
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking phf_shared v0.8.0
[INFO] [stderr]    Compiling nom v7.1.0
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]    Compiling const-random-macro v0.1.13
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking const-random v0.1.13
[INFO] [stderr]    Compiling thiserror-impl v1.0.6
[INFO] [stderr]     Checking string_cache v0.8.0
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking thiserror v1.0.6
[INFO] [stderr]  Documenting advent_of_code_2019 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:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | / #![feature(
[INFO] [stdout] 2  | |     auto_traits,
[INFO] [stdout] 3  | |     drain_filter,
[INFO] [stdout] 4  | |     entry_insert,
[INFO] [stdout] ...  |
[INFO] [stdout] 13 | |     trusted_len
[INFO] [stdout] 14 | | )]
[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_2019`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name advent_of_code_2019 src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=1e1bb9753b3024d0 -L dependency=/opt/rustwide/target/debug/deps --extern ahash=/opt/rustwide/target/debug/deps/libahash-d0747fb7d7ad03ed.rmeta --extern arrayvec=/opt/rustwide/target/debug/deps/libarrayvec-1bd22f1176b54d7c.rmeta --extern colored=/opt/rustwide/target/debug/deps/libcolored-e9790b5fe43bba79.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-fd2cb9a5c84c6307.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-78cc5f967ff1ac16.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-ce054685ebb35006.rmeta --extern string_cache=/opt/rustwide/target/debug/deps/libstring_cache-d29f3c0b99d26f1c.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-ae84821150e015d3.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "801a178ea7483599208b1e2ef36b6aa5da552900ff54ea0570e57f434aa86ef1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "801a178ea7483599208b1e2ef36b6aa5da552900ff54ea0570e57f434aa86ef1", kill_on_drop: false }`
[INFO] [stdout] 801a178ea7483599208b1e2ef36b6aa5da552900ff54ea0570e57f434aa86ef1