[INFO] fetching crate oculante 0.4.6...
[INFO] documenting oculante-0.4.6 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate oculante 0.4.6 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate oculante 0.4.6 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 crates.io crate oculante 0.4.6
[INFO] finished tweaking crates.io crate oculante 0.4.6
[INFO] tweaked toml for crates.io crate oculante 0.4.6 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate oculante 0.4.6 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 12505981e40bc4e805c519ae85b62eccb56d5d0f795be5e049dc8a99301ceb00
[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" "12505981e40bc4e805c519ae85b62eccb56d5d0f795be5e049dc8a99301ceb00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12505981e40bc4e805c519ae85b62eccb56d5d0f795be5e049dc8a99301ceb00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12505981e40bc4e805c519ae85b62eccb56d5d0f795be5e049dc8a99301ceb00", kill_on_drop: false }`
[INFO] [stdout] 12505981e40bc4e805c519ae85b62eccb56d5d0f795be5e049dc8a99301ceb00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] [stdout] 0715827a6cdb4f74316d56f9dd8f68b75ace8504b600c43d3dfd6fb87220ce77
[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" "0715827a6cdb4f74316d56f9dd8f68b75ace8504b600c43d3dfd6fb87220ce77", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.40
[INFO] [stderr]     Checking piston-graphics_api_version v1.0.0
[INFO] [stderr]     Checking piston-texture v0.8.0
[INFO] [stderr]    Compiling oculante v0.4.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking imgref v1.7.0
[INFO] [stderr]     Checking lebe v0.5.1
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling nsvg v0.5.1
[INFO] [stderr]     Checking rgb v0.8.25
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]    Compiling gl_generator v0.10.0
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking num-complex v0.2.4
[INFO] [stderr]     Checking gfx_core v0.9.2
[INFO] [stderr]     Checking wayland-sys v0.21.13
[INFO] [stderr]     Checking bincode v0.8.0
[INFO] [stderr]    Compiling wayland-client v0.21.13
[INFO] [stderr]    Compiling wayland-protocols v0.21.13
[INFO] [stderr]     Checking num-rational v0.2.4
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking shader_version v0.7.0
[INFO] [stderr]     Checking rayon-core v1.8.0
[INFO] [stderr]     Checking wayland-commons v0.21.13
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking rusttype v0.8.3
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking gif-dispose v2.4.1
[INFO] [stderr]     Checking simba v0.2.0
[INFO] [stderr]     Checking rusttype v0.7.9
[INFO] [stderr]     Checking piston2d-graphics v0.37.0
[INFO] [stderr]     Checking andrew v0.2.1
[INFO] [stderr]     Checking rayon v1.4.0
[INFO] [stderr]    Compiling gl v0.11.0
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.5
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.7
[INFO] [stderr]    Compiling gfx_gl v0.6.1
[INFO] [stderr]     Checking nalgebra v0.22.0
[INFO] [stderr]     Checking gfx v0.18.2
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]     Checking exr v0.9.0
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking image v0.23.9
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking psd v0.1.9
[INFO] [stderr]     Checking gfx_device_gl v0.16.2
[INFO] [stderr]     Checking piston-gfx_texture v0.41.0
[INFO] [stderr]     Checking piston2d-gfx_graphics v0.70.0
[INFO] [stderr]     Checking pistoncore-input v1.0.0
[INFO] [stderr]     Checking dds-rs v0.7.0
[INFO] [stderr]     Checking pistoncore-window v0.47.0
[INFO] [stderr]     Checking pistoncore-event_loop v0.52.0
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.6
[INFO] [stderr]     Checking piston v0.52.0
[INFO] [stderr]     Checking winit v0.19.5
[INFO] [stderr]     Checking glutin v0.21.2
[INFO] [stderr]     Checking pistoncore-glutin_window v0.66.0
[INFO] [stderr]     Checking piston_window v0.112.0
[INFO] [stderr]  Documenting oculante v0.4.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(test)]
[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 `oculante`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name oculante 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 clap=/opt/rustwide/target/debug/deps/libclap-01cfab8e0f4cc93d.rmeta --extern dds=/opt/rustwide/target/debug/deps/libdds-5e3ff76d36f01105.rmeta --extern exr=/opt/rustwide/target/debug/deps/libexr-2f4aa3401ef60373.rmeta --extern gif=/opt/rustwide/target/debug/deps/libgif-ee567dcff671e2e5.rmeta --extern gif_dispose=/opt/rustwide/target/debug/deps/libgif_dispose-8077ae5ccca0f807.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-ff72eb04cd48d26f.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-72923b2d9aa06af7.rmeta --extern nalgebra=/opt/rustwide/target/debug/deps/libnalgebra-667dece012a75b4a.rmeta --extern nsvg=/opt/rustwide/target/debug/deps/libnsvg-000383197a8fd67d.rmeta --extern graphics=/opt/rustwide/target/debug/deps/libgraphics-a7b286c81b40e74b.rmeta --extern piston_window=/opt/rustwide/target/debug/deps/libpiston_window-e9f3f92f462682fe.rmeta --extern psd=/opt/rustwide/target/debug/deps/libpsd-9c11ea96aadc252f.rmeta --extern rgb=/opt/rustwide/target/debug/deps/librgb-12b4881c83714f64.rmeta --cap-lints=warn --crate-version 0.4.6` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "0715827a6cdb4f74316d56f9dd8f68b75ace8504b600c43d3dfd6fb87220ce77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0715827a6cdb4f74316d56f9dd8f68b75ace8504b600c43d3dfd6fb87220ce77", kill_on_drop: false }`
[INFO] [stdout] 0715827a6cdb4f74316d56f9dd8f68b75ace8504b600c43d3dfd6fb87220ce77
