[INFO] cloning repository https://github.com/Brychlikov/rps_cell
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Brychlikov/rps_cell" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBrychlikov%2Frps_cell", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBrychlikov%2Frps_cell'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b1319aacd821006c3e2354161d20fae8288c1e1c
[INFO] documenting Brychlikov/rps_cell against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBrychlikov%2Frps_cell" "/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/Brychlikov/rps_cell on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Brychlikov/rps_cell
[INFO] finished tweaking git repo https://github.com/Brychlikov/rps_cell
[INFO] tweaked toml for git repo https://github.com/Brychlikov/rps_cell written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Brychlikov/rps_cell already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f186ac5b58bd70801354cd867c9bba7786532bdd0b47a1a0818276023d4dc1e7
[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" "f186ac5b58bd70801354cd867c9bba7786532bdd0b47a1a0818276023d4dc1e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f186ac5b58bd70801354cd867c9bba7786532bdd0b47a1a0818276023d4dc1e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f186ac5b58bd70801354cd867c9bba7786532bdd0b47a1a0818276023d4dc1e7", kill_on_drop: false }`
[INFO] [stdout] f186ac5b58bd70801354cd867c9bba7786532bdd0b47a1a0818276023d4dc1e7
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "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] 11e27624bb06f490177c06afe334f6b4d00ded3d996fd85b1ff402a4cd0e0b0c
[INFO] running `Command { std: "docker" "start" "-a" "11e27624bb06f490177c06afe334f6b4d00ded3d996fd85b1ff402a4cd0e0b0c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling xml-rs v0.8.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling cc v1.0.47
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking downcast-rs v1.1.1
[INFO] [stderr]    Compiling rayon-core v1.6.1
[INFO] [stderr]     Checking same-file v1.0.5
[INFO] [stderr]     Checking adler32 v1.0.4
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling ndarray v0.13.0
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]     Checking lock_api v0.3.1
[INFO] [stderr]     Checking itertools v0.8.1
[INFO] [stderr]     Checking walkdir v2.2.9
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]    Compiling wayland-scanner v0.21.13
[INFO] [stderr]    Compiling gl_generator v0.10.0
[INFO] [stderr]    Compiling gl_generator v0.13.1
[INFO] [stderr]    Compiling gl_generator v0.11.0
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling derivative v1.0.3
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]    Compiling x11-dl v2.18.4
[INFO] [stderr]     Checking crossbeam-queue v0.2.0
[INFO] [stderr]     Checking stb_truetype v0.3.0
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]     Checking raw-window-handle v0.3.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking png v0.15.1
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking line_drawing v0.7.0
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]     Checking rusttype v0.8.1
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]    Compiling gl v0.11.0
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.4
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.5
[INFO] [stderr]     Checking rusttype v0.7.9
[INFO] [stderr]     Checking andrew v0.2.1
[INFO] [stderr]     Checking piston2d-graphics v0.35.0
[INFO] [stderr]     Checking rayon v1.2.1
[INFO] [stderr]     Checking dlib v0.4.1
[INFO] [stderr]    Compiling wayland-client v0.21.13
[INFO] [stderr]    Compiling wayland-protocols v0.21.13
[INFO] [stderr]     Checking wayland-sys v0.21.13
[INFO] [stderr]     Checking tiff v0.3.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.16
[INFO] [stderr]     Checking wayland-commons v0.21.13
[INFO] [stderr]     Checking image v0.22.3
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]     Checking piston2d-opengl_graphics v0.69.0
[INFO] [stderr]     Checking pistoncore-input v0.28.0
[INFO] [stderr]     Checking pistoncore-window v0.44.0
[INFO] [stderr]     Checking pistoncore-event_loop v0.49.0
[INFO] [stderr]     Checking piston v0.49.0
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.6
[INFO] [stderr]     Checking winit v0.19.5
[INFO] [stderr]     Checking glutin v0.21.1
[INFO] [stderr]     Checking pistoncore-glutin_window v0.63.0
[INFO] [stderr]  Documenting rps_cell 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(generators, generator_trait)]
[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 `rps_cell`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name rps_cell 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 ndarray=/opt/rustwide/target/debug/deps/libndarray-5f0fc3c9026bc67f.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-eb3731b537c09d61.rmeta --extern piston=/opt/rustwide/target/debug/deps/libpiston-5777e8d1043e093b.rmeta --extern graphics=/opt/rustwide/target/debug/deps/libgraphics-0de654662f5934c0.rmeta --extern opengl_graphics=/opt/rustwide/target/debug/deps/libopengl_graphics-25ae33c8fc6075fb.rmeta --extern glutin_window=/opt/rustwide/target/debug/deps/libglutin_window-65cf621ee08fb834.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-c247d9206329a49a.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "11e27624bb06f490177c06afe334f6b4d00ded3d996fd85b1ff402a4cd0e0b0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11e27624bb06f490177c06afe334f6b4d00ded3d996fd85b1ff402a4cd0e0b0c", kill_on_drop: false }`
[INFO] [stdout] 11e27624bb06f490177c06afe334f6b4d00ded3d996fd85b1ff402a4cd0e0b0c
