[INFO] cloning repository https://github.com/tuomas56/pixelengine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tuomas56/pixelengine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftuomas56%2Fpixelengine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftuomas56%2Fpixelengine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b512b11fc66f1f0161952842da1b61c8fde3dab5
[INFO] documenting tuomas56/pixelengine against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftuomas56%2Fpixelengine" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tuomas56/pixelengine on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tuomas56/pixelengine
[INFO] finished tweaking git repo https://github.com/tuomas56/pixelengine
[INFO] tweaked toml for git repo https://github.com/tuomas56/pixelengine written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/tuomas56/pixelengine already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ordered-float v1.0.1
[INFO] [stderr]   Downloaded approx v0.3.1
[INFO] [stderr]   Downloaded rand_os v0.1.1
[INFO] [stderr]   Downloaded safe-transmute v0.10.1
[INFO] [stderr]   Downloaded image v0.21.0
[INFO] [stderr]   Downloaded wayland-commons v0.20.12
[INFO] [stderr]   Downloaded wayland-scanner v0.20.12
[INFO] [stderr]   Downloaded glutin v0.17.0
[INFO] [stderr]   Downloaded downcast-rs v1.0.3
[INFO] [stderr]   Downloaded tempfile v3.0.8
[INFO] [stderr]   Downloaded core-foundation v0.6.3
[INFO] [stderr]   Downloaded cocoa v0.15.0
[INFO] [stderr]   Downloaded rusttype v0.7.4
[INFO] [stderr]   Downloaded rand v0.6.4
[INFO] [stderr]   Downloaded wayland-protocols v0.20.12
[INFO] [stderr]   Downloaded smithay-client-toolkit v0.2.6
[INFO] [stderr]   Downloaded rand v0.5.6
[INFO] [stderr]   Downloaded winit v0.16.2
[INFO] [stderr]   Downloaded wayland-sys v0.20.12
[INFO] [stderr]   Downloaded glium v0.22.0
[INFO] [stderr]   Downloaded libc v0.2.58
[INFO] [stderr]   Downloaded core-graphics v0.14.0
[INFO] [stderr]   Downloaded wayland-client v0.20.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5aa479b99a4150e85d2f5eb0feb0bd35766320174fa84be940891e4fdc816bcc
[INFO] running `Command { std: "docker" "start" "-a" "5aa479b99a4150e85d2f5eb0feb0bd35766320174fa84be940891e4fdc816bcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5aa479b99a4150e85d2f5eb0feb0bd35766320174fa84be940891e4fdc816bcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5aa479b99a4150e85d2f5eb0feb0bd35766320174fa84be940891e4fdc816bcc", kill_on_drop: false }`
[INFO] [stdout] 5aa479b99a4150e85d2f5eb0feb0bd35766320174fa84be940891e4fdc816bcc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4bfe3bd002e3e94587473ab8a8f92a8536960290a0bcd4b2212f88eb5b14d7e8
[INFO] running `Command { std: "docker" "start" "-a" "4bfe3bd002e3e94587473ab8a8f92a8536960290a0bcd4b2212f88eb5b14d7e8", kill_on_drop: false }`
[INFO] [stderr]     Checking stb_truetype v0.2.6
[INFO] [stderr]     Checking rand_os v0.1.1
[INFO] [stderr]     Checking num_cpus v1.10.0
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking memmap v0.6.2
[INFO] [stderr]     Checking nix v0.11.1
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]     Checking backtrace-sys v0.1.28
[INFO] [stderr]     Checking x11-dl v2.18.3
[INFO] [stderr]    Compiling syn v0.15.27
[INFO] [stderr]     Checking wayland-sys v0.20.12
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking png v0.14.0
[INFO] [stderr]     Checking backtrace v0.3.13
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking rand v0.6.4
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]     Checking rusttype v0.7.4
[INFO] [stderr]     Checking wayland-commons v0.20.12
[INFO] [stderr]     Checking rayon v1.0.3
[INFO] [stderr]     Checking wayland-client v0.20.12
[INFO] [stderr]     Checking tempfile v3.0.8
[INFO] [stderr]     Checking parking_lot_core v0.3.1
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking wayland-protocols v0.20.12
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]     Checking smithay-client-toolkit v0.2.6
[INFO] [stderr]    Compiling num-derive v0.2.4
[INFO] [stderr]     Checking winit v0.16.2
[INFO] [stderr]     Checking tiff v0.2.2
[INFO] [stderr]     Checking glutin v0.17.0
[INFO] [stderr]     Checking image v0.21.0
[INFO] [stderr]     Checking glium v0.22.0
[INFO] [stderr]  Documenting pixelengine 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(let_chains)]
[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 `pixelengine`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name pixelengine 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 glium=/opt/rustwide/target/debug/deps/libglium-3b39dab231e433eb.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-28e9d2f552dd87cd.rmeta --extern rusttype=/opt/rustwide/target/debug/deps/librusttype-aaba7a8096e5ca1c.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "4bfe3bd002e3e94587473ab8a8f92a8536960290a0bcd4b2212f88eb5b14d7e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bfe3bd002e3e94587473ab8a8f92a8536960290a0bcd4b2212f88eb5b14d7e8", kill_on_drop: false }`
[INFO] [stdout] 4bfe3bd002e3e94587473ab8a8f92a8536960290a0bcd4b2212f88eb5b14d7e8
