[INFO] fetching crate pollock 0.3.2...
[INFO] documenting pollock-0.3.2 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate pollock 0.3.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate pollock 0.3.2 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 crates.io crate pollock 0.3.2
[INFO] finished tweaking crates.io crate pollock 0.3.2
[INFO] tweaked toml for crates.io crate pollock 0.3.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b340d84432012aef315da90e5ada09ab587fdc69c2c01654cc82316f73667ace
[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" "b340d84432012aef315da90e5ada09ab587fdc69c2c01654cc82316f73667ace", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b340d84432012aef315da90e5ada09ab587fdc69c2c01654cc82316f73667ace", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b340d84432012aef315da90e5ada09ab587fdc69c2c01654cc82316f73667ace", kill_on_drop: false }`
[INFO] [stdout] b340d84432012aef315da90e5ada09ab587fdc69c2c01654cc82316f73667ace
[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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f41ffa63b7d2ded562e28616363017d9ee5926731fd66fdab093fae8211334e6
[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" "f41ffa63b7d2ded562e28616363017d9ee5926731fd66fdab093fae8211334e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling nix v0.11.1
[INFO] [stderr]    Compiling libm v0.1.4
[INFO] [stderr]     Checking imgref v1.7.0
[INFO] [stderr]     Checking natord v1.0.9
[INFO] [stderr]     Checking resize v0.3.1
[INFO] [stderr]     Checking wild v2.0.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling imagequant-sys v2.12.7
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking memmap v0.6.2
[INFO] [stderr]     Checking lodepng v2.7.3
[INFO] [stderr]     Checking draw_state v0.8.0
[INFO] [stderr]     Checking crossbeam-epoch v0.6.1
[INFO] [stderr]     Checking crossbeam-epoch v0.5.2
[INFO] [stderr]     Checking generic-array v0.11.1
[INFO] [stderr]    Compiling wayland-scanner v0.20.12
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking wayland-sys v0.20.12
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking pbr v1.0.3
[INFO] [stderr]     Checking gif-dispose v2.4.1
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking crossbeam-deque v0.5.2
[INFO] [stderr]     Checking gfx_core v0.8.3
[INFO] [stderr]     Checking wayland-commons v0.20.12
[INFO] [stderr]    Compiling wayland-client v0.20.12
[INFO] [stderr]    Compiling wayland-protocols v0.20.12
[INFO] [stderr]     Checking imagequant v2.12.5
[INFO] [stderr]    Compiling gfx_gl v0.5.0
[INFO] [stderr]    Compiling glutin v0.18.0
[INFO] [stderr]     Checking gifski v0.8.7
[INFO] [stderr]     Checking tiff v0.2.2
[INFO] [stderr]     Checking image v0.20.1
[INFO] [stderr]    Compiling palette_derive v0.4.1
[INFO] [stderr]     Checking gfx v0.17.1
[INFO] [stderr]     Checking gfx_device_gl v0.15.5
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking alga v0.7.2
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking parking_lot_core v0.3.1
[INFO] [stderr]     Checking smithay-client-toolkit v0.3.0
[INFO] [stderr]     Checking nalgebra v0.16.14
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking crossbeam-channel v0.2.6
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]     Checking winit v0.17.2
[INFO] [stderr]     Checking crossbeam v0.4.1
[INFO] [stderr]    Compiling palette v0.4.1
[INFO] [stderr]     Checking gfx_window_glutin v0.26.0
[INFO] [stderr]  Documenting pollock v0.3.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(nll)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(external_doc)]
[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 `pollock`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name pollock 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 alga=/opt/rustwide/target/debug/deps/libalga-e7b8e5f07c06649a.rmeta --extern arrayvec=/opt/rustwide/target/debug/deps/libarrayvec-bf4f7663afd01203.rmeta --extern crossbeam=/opt/rustwide/target/debug/deps/libcrossbeam-3d0499f2da21e7c3.rmeta --extern fnv=/opt/rustwide/target/debug/deps/libfnv-6f83b5744b59dc2d.rmeta --extern gfx=/opt/rustwide/target/debug/deps/libgfx-42a63b2923d6ffb4.rmeta --extern gfx_window_glutin=/opt/rustwide/target/debug/deps/libgfx_window_glutin-7b7430df75e011b7.rmeta --extern gifski=/opt/rustwide/target/debug/deps/libgifski-48b7710891dce617.rmeta --extern glutin=/opt/rustwide/target/debug/deps/libglutin-d9fe478364aa767a.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-b0d5f451df5e088f.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-224050d4cfaf9b24.rmeta --extern nalgebra=/opt/rustwide/target/debug/deps/libnalgebra-418f092e57808536.rmeta --extern palette=/opt/rustwide/target/debug/deps/libpalette-069646596b341388.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-18f76d1ec5b5bec3.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-2054a0ef505987af.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-9657277a275bd2e8.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-b5e69c021f93b22a.rmeta --extern tempfile=/opt/rustwide/target/debug/deps/libtempfile-acf8ecb6f63fff47.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "f41ffa63b7d2ded562e28616363017d9ee5926731fd66fdab093fae8211334e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f41ffa63b7d2ded562e28616363017d9ee5926731fd66fdab093fae8211334e6", kill_on_drop: false }`
[INFO] [stdout] f41ffa63b7d2ded562e28616363017d9ee5926731fd66fdab093fae8211334e6