[INFO] cloning repository https://github.com/matharumanpreet00/rust-tetris
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/matharumanpreet00/rust-tetris" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatharumanpreet00%2Frust-tetris", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatharumanpreet00%2Frust-tetris'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 08670b934cb52fe015130a6ff6ca50e4aeb57b40
[INFO] documenting matharumanpreet00/rust-tetris 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%2Fmatharumanpreet00%2Frust-tetris" "/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/matharumanpreet00/rust-tetris 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/matharumanpreet00/rust-tetris
[INFO] finished tweaking git repo https://github.com/matharumanpreet00/rust-tetris
[INFO] tweaked toml for git repo https://github.com/matharumanpreet00/rust-tetris written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/matharumanpreet00/rust-tetris already has a lockfile, it will not be regenerated
[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]     Updating git repository `https://github.com/Rust-SDL2/rust-sdl2`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 305411cd495e45ca5cd1cb719c2c0bf0356c1354f28291067b5f3e3f6b467222
[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" "305411cd495e45ca5cd1cb719c2c0bf0356c1354f28291067b5f3e3f6b467222", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "305411cd495e45ca5cd1cb719c2c0bf0356c1354f28291067b5f3e3f6b467222", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "305411cd495e45ca5cd1cb719c2c0bf0356c1354f28291067b5f3e3f6b467222", kill_on_drop: false }`
[INFO] [stdout] 305411cd495e45ca5cd1cb719c2c0bf0356c1354f28291067b5f3e3f6b467222
[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" "+beta-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9864aec1ef8d1921d699e03b7a39de8a04a7cb2be13fe643bb37490f0c7ba5b
[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" "c9864aec1ef8d1921d699e03b7a39de8a04a7cb2be13fe643bb37490f0c7ba5b", kill_on_drop: false }`
[INFO] [stderr]    Compiling sdl2-sys v0.32.1 (https://github.com/Rust-SDL2/rust-sdl2#cfced74f)
[INFO] [stderr]     Checking sdl2 v0.32.0-beta.2 (https://github.com/Rust-SDL2/rust-sdl2#cfced74f)
[INFO] [stderr]  Documenting tetris v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(duration_as_u128)]
[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 `tetris`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name tetris 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 rand=/opt/rustwide/target/debug/deps/librand-14f856f079f391d2.rmeta --extern sdl2=/opt/rustwide/target/debug/deps/libsdl2-bef745841a36ae1f.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "c9864aec1ef8d1921d699e03b7a39de8a04a7cb2be13fe643bb37490f0c7ba5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9864aec1ef8d1921d699e03b7a39de8a04a7cb2be13fe643bb37490f0c7ba5b", kill_on_drop: false }`
[INFO] [stdout] c9864aec1ef8d1921d699e03b7a39de8a04a7cb2be13fe643bb37490f0c7ba5b
