[INFO] fetching crate gust-render 0.2.0...
[INFO] documenting gust-render-0.2.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate gust-render 0.2.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate gust-render 0.2.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gust-render 0.2.0
[INFO] finished tweaking crates.io crate gust-render 0.2.0
[INFO] tweaked toml for crates.io crate gust-render 0.2.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded glfw v0.25.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 81f222fc2f78f909ae40244a8044db34643885b51cdf6c4ca06aeb68306a4d45
[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" "81f222fc2f78f909ae40244a8044db34643885b51cdf6c4ca06aeb68306a4d45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "81f222fc2f78f909ae40244a8044db34643885b51cdf6c4ca06aeb68306a4d45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81f222fc2f78f909ae40244a8044db34643885b51cdf6c4ca06aeb68306a4d45", kill_on_drop: false }`
[INFO] [stdout] 81f222fc2f78f909ae40244a8044db34643885b51cdf6c4ca06aeb68306a4d45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bf6d6228fdf9b7e93487da4e3d5772568ed5bdfc93bb9d930416f366cdd39d4c
[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" "bf6d6228fdf9b7e93487da4e3d5772568ed5bdfc93bb9d930416f366cdd39d4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]     Checking nom v1.2.4
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]    Compiling libz-sys v1.1.1
[INFO] [stderr]    Compiling freetype-sys v0.7.1
[INFO] [stderr]    Compiling glfw-sys v3.3.2
[INFO] [stderr]    Compiling gl_generator v0.10.0
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking generic-array v0.11.1
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking alga v0.7.2
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]     Checking semver v0.2.3
[INFO] [stderr]     Checking freetype-rs v0.19.1
[INFO] [stderr]     Checking nalgebra v0.16.14
[INFO] [stderr]    Compiling gl v0.11.0
[INFO] [stderr]     Checking glfw v0.25.1
[INFO] [stderr]     Checking tiff v0.2.2
[INFO] [stderr]     Checking image v0.20.1
[INFO] [stderr]  Documenting gust-render v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:72:1
[INFO] [stdout]    |
[INFO] [stdout] 72 | #![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 `gust-render`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name gust_render 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-de0b7c021fa4bab0.rmeta --extern freetype=/opt/rustwide/target/debug/deps/libfreetype-e52cfe7500e9f093.rmeta --extern gl=/opt/rustwide/target/debug/deps/libgl-5fc388f609aee5a2.rmeta --extern glfw=/opt/rustwide/target/debug/deps/libglfw-e3006564fcaca9c8.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-a851fbd686b59357.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-db88f49d9e5662e7.rmeta --extern nalgebra=/opt/rustwide/target/debug/deps/libnalgebra-1cc78c0c3a6a51c4.rmeta --cap-lints=warn --crate-version 0.2.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "bf6d6228fdf9b7e93487da4e3d5772568ed5bdfc93bb9d930416f366cdd39d4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf6d6228fdf9b7e93487da4e3d5772568ed5bdfc93bb9d930416f366cdd39d4c", kill_on_drop: false }`
[INFO] [stdout] bf6d6228fdf9b7e93487da4e3d5772568ed5bdfc93bb9d930416f366cdd39d4c