[INFO] cloning repository https://github.com/redzic/alacritty-conf
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/redzic/alacritty-conf" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredzic%2Falacritty-conf", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredzic%2Falacritty-conf'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a53233cf1d7d2e24923c6195b40fafa3bc9e09e3
[INFO] documenting redzic/alacritty-conf against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredzic%2Falacritty-conf" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/redzic/alacritty-conf on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/redzic/alacritty-conf
[INFO] finished tweaking git repo https://github.com/redzic/alacritty-conf
[INFO] tweaked toml for git repo https://github.com/redzic/alacritty-conf written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/redzic/alacritty-conf already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1a00bdc024e032d35a31103c34366e82c5612e6618bce22106535f7730345c00
[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" "1a00bdc024e032d35a31103c34366e82c5612e6618bce22106535f7730345c00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a00bdc024e032d35a31103c34366e82c5612e6618bce22106535f7730345c00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a00bdc024e032d35a31103c34366e82c5612e6618bce22106535f7730345c00", kill_on_drop: false }`
[INFO] [stdout] 1a00bdc024e032d35a31103c34366e82c5612e6618bce22106535f7730345c00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eb557e5b725b5e1d29be08275d3a0ed3bf96472bf62987bbf1e45b76a8d0c261
[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" "eb557e5b725b5e1d29be08275d3a0ed3bf96472bf62987bbf1e45b76a8d0c261", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling syn v1.0.36
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking bytemuck v1.3.1
[INFO] [stderr]     Checking linked-hash-map v0.5.3
[INFO] [stderr]     Checking cassowary v0.3.0
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking rgb v0.8.20
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking termion v1.5.5
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking dirs v3.0.1
[INFO] [stderr]     Checking tui v0.10.0
[INFO] [stderr]     Checking chrono v0.4.13
[INFO] [stderr]    Compiling structopt-derive v0.4.9
[INFO] [stderr]     Checking structopt v0.3.16
[INFO] [stderr]  Documenting alacritty-conf 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:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(const_option)]
[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 `alacritty-conf`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name alacritty_conf src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-3106dbaf04231579.rmeta --extern dirs=/opt/rustwide/target/debug/deps/libdirs-705683b4de506eb7.rmeta --extern hex=/opt/rustwide/target/debug/deps/libhex-88b93a2a096ee79e.rmeta --extern rgb=/opt/rustwide/target/debug/deps/librgb-3c60c91c0629af11.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-bad10f84b5531650.rmeta --extern termcolor=/opt/rustwide/target/debug/deps/libtermcolor-4e4cd72f69e3b5a4.rmeta --extern termion=/opt/rustwide/target/debug/deps/libtermion-5d763867ac4651e5.rmeta --extern tui=/opt/rustwide/target/debug/deps/libtui-38a2baf0bff40a4d.rmeta --extern yaml_rust=/opt/rustwide/target/debug/deps/libyaml_rust-d4c35ebea6d80308.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "eb557e5b725b5e1d29be08275d3a0ed3bf96472bf62987bbf1e45b76a8d0c261", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb557e5b725b5e1d29be08275d3a0ed3bf96472bf62987bbf1e45b76a8d0c261", kill_on_drop: false }`
[INFO] [stdout] eb557e5b725b5e1d29be08275d3a0ed3bf96472bf62987bbf1e45b76a8d0c261