[INFO] cloning repository https://github.com/myelin-ai/engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/myelin-ai/engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmyelin-ai%2Fengine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmyelin-ai%2Fengine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0457e868357cef6916418e9674807b6988414444
[INFO] documenting myelin-ai/engine 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%2Fmyelin-ai%2Fengine" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/myelin-ai/engine 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/myelin-ai/engine
[INFO] finished tweaking git repo https://github.com/myelin-ai/engine
[INFO] tweaked toml for git repo https://github.com/myelin-ai/engine written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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 generational-arena v0.2.8
[INFO] [stderr]   Downloaded slotmap v0.3.0
[INFO] [stderr]   Downloaded ncollide2d v0.20.1
[INFO] [stderr]   Downloaded mockiato-codegen v0.9.5
[INFO] [stderr]   Downloaded mockiato v0.9.5
[INFO] [stderr]   Downloaded nameof v1.2.1
[INFO] [stderr]   Downloaded nearly_eq v0.2.4
[INFO] [stderr]   Downloaded nphysics2d v0.12.3
[INFO] [stderr]   Downloaded myelin-geometry v2.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stdout] c0559c784aea64b282290ddbdc8d733b6ae44ffb6dd9021bbf9dc2bce793f280
[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" "c0559c784aea64b282290ddbdc8d733b6ae44ffb6dd9021bbf9dc2bce793f280", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0559c784aea64b282290ddbdc8d733b6ae44ffb6dd9021bbf9dc2bce793f280", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0559c784aea64b282290ddbdc8d733b6ae44ffb6dd9021bbf9dc2bce793f280", kill_on_drop: false }`
[INFO] [stdout] c0559c784aea64b282290ddbdc8d733b6ae44ffb6dd9021bbf9dc2bce793f280
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 51b9bef5d71e0ac9ff699934f07569342dbc71e75c336f22b12629d442e2a87e
[INFO] running `Command { std: "docker" "start" "-a" "51b9bef5d71e0ac9ff699934f07569342dbc71e75c336f22b12629d442e2a87e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]     Checking slotmap v0.3.0
[INFO] [stderr]     Checking nameof v1.2.1
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking generational-arena v0.2.8
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking alga v0.9.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking nalgebra v0.18.1
[INFO] [stderr]    Compiling syn v1.0.45
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]     Checking serde v1.0.117
[INFO] [stderr]     Checking ncollide2d v0.20.1
[INFO] [stderr]     Checking myelin-geometry v2.4.1
[INFO] [stderr]     Checking nphysics2d v0.12.3
[INFO] [stderr]  Documenting myelin-engine v0.14.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(non_exhaustive)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(box_syntax)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(trait_alias)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 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 `myelin-engine`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name myelin_engine 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-8cdc3112b411762b.rmeta --extern myelin_geometry=/opt/rustwide/target/debug/deps/libmyelin_geometry-e2c9fec4650da522.rmeta --extern nalgebra=/opt/rustwide/target/debug/deps/libnalgebra-8d2866e40595a74d.rmeta --extern nameof=/opt/rustwide/target/debug/deps/libnameof-0c0900c57b35c98a.rmeta --extern ncollide2d=/opt/rustwide/target/debug/deps/libncollide2d-b9317c193b5831ab.rmeta --extern nphysics2d=/opt/rustwide/target/debug/deps/libnphysics2d-2e2c19bfada3f2e1.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-69a86b7449761bf3.rmeta --extern slab=/opt/rustwide/target/debug/deps/libslab-e0e0e35ef9a5003f.rmeta --cap-lints=warn --crate-version 0.14.1` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "51b9bef5d71e0ac9ff699934f07569342dbc71e75c336f22b12629d442e2a87e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51b9bef5d71e0ac9ff699934f07569342dbc71e75c336f22b12629d442e2a87e", kill_on_drop: false }`
[INFO] [stdout] 51b9bef5d71e0ac9ff699934f07569342dbc71e75c336f22b12629d442e2a87e
