[INFO] cloning repository https://github.com/sphynx/aoc-2019
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sphynx/aoc-2019" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsphynx%2Faoc-2019", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsphynx%2Faoc-2019'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 85bde8e42d73443903f79c4bb2f537fb9881af33
[INFO] documenting sphynx/aoc-2019 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsphynx%2Faoc-2019" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sphynx/aoc-2019 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sphynx/aoc-2019
[INFO] finished tweaking git repo https://github.com/sphynx/aoc-2019
[INFO] tweaked toml for git repo https://github.com/sphynx/aoc-2019 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/sphynx/aoc-2019 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded indoc-impl v0.3.4
[INFO] [stderr]   Downloaded indoc v0.3.4
[INFO] [stderr]   Downloaded png v0.15.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b03fecad8420a371e658c2b2a98fc5408f69be028ec352e7813bb296ca0399a1
[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" "b03fecad8420a371e658c2b2a98fc5408f69be028ec352e7813bb296ca0399a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b03fecad8420a371e658c2b2a98fc5408f69be028ec352e7813bb296ca0399a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b03fecad8420a371e658c2b2a98fc5408f69be028ec352e7813bb296ca0399a1", kill_on_drop: false }`
[INFO] [stdout] b03fecad8420a371e658c2b2a98fc5408f69be028ec352e7813bb296ca0399a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6af37a849dd9981d0ea1b36e9fa19d5ce8aba5fd457cee6dd26423082b86631f
[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" "6af37a849dd9981d0ea1b36e9fa19d5ce8aba5fd457cee6dd26423082b86631f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rayon-core v1.6.1
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling unindent v0.1.5
[INFO] [stderr]     Checking permutohedron v0.2.4
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking crossbeam-queue v0.2.0
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking png v0.15.2
[INFO] [stderr]     Checking rayon v1.2.1
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking num-integer v0.1.41
[INFO] [stderr]     Checking tiff v0.3.1
[INFO] [stderr]     Checking num-complex v0.2.3
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking num-bigint v0.2.3
[INFO] [stderr]     Checking jpeg-decoder v0.1.18
[INFO] [stderr]     Checking num-rational v0.2.2
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking image v0.22.3
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling indoc-impl v0.3.4
[INFO] [stderr]     Checking indoc v0.3.4
[INFO] [stderr]  Documenting aoc-2019 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(is_sorted)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(toowned_clone_into)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `aoc-2019`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name aoc_2019 src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-908c6f7954849eb5.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-e9e2fbdb966e47ba.rmeta --extern indoc=/opt/rustwide/target/debug/deps/libindoc-6cdd0707279a924f.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-915afbb154a8b0b0.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-69d9a7f018cb28c7.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-b2277f679d3ab92f.rmeta --extern permutohedron=/opt/rustwide/target/debug/deps/libpermutohedron-0ced619323eba3ff.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "6af37a849dd9981d0ea1b36e9fa19d5ce8aba5fd457cee6dd26423082b86631f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6af37a849dd9981d0ea1b36e9fa19d5ce8aba5fd457cee6dd26423082b86631f", kill_on_drop: false }`
[INFO] [stdout] 6af37a849dd9981d0ea1b36e9fa19d5ce8aba5fd457cee6dd26423082b86631f