[INFO] cloning repository https://github.com/tobyjsullivan/rust-game-loop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tobyjsullivan/rust-game-loop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftobyjsullivan%2Frust-game-loop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftobyjsullivan%2Frust-game-loop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7cb7bfe6f404795db58a89d3c6dcc0f925471584
[INFO] documenting tobyjsullivan/rust-game-loop against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftobyjsullivan%2Frust-game-loop" "/workspace/builds/worker-21/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-21/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tobyjsullivan/rust-game-loop on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tobyjsullivan/rust-game-loop
[INFO] finished tweaking git repo https://github.com/tobyjsullivan/rust-game-loop
[INFO] tweaked toml for git repo https://github.com/tobyjsullivan/rust-game-loop written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] crate git repo https://github.com/tobyjsullivan/rust-game-loop already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 40a255b2d0c8031525ecb8e0b82e69ad93216a87e8dd270795df42bca1cf9ed9
[INFO] running `Command { std: "docker" "start" "-a" "40a255b2d0c8031525ecb8e0b82e69ad93216a87e8dd270795df42bca1cf9ed9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40a255b2d0c8031525ecb8e0b82e69ad93216a87e8dd270795df42bca1cf9ed9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40a255b2d0c8031525ecb8e0b82e69ad93216a87e8dd270795df42bca1cf9ed9", kill_on_drop: false }`
[INFO] [stdout] 40a255b2d0c8031525ecb8e0b82e69ad93216a87e8dd270795df42bca1cf9ed9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc7958086797a8e34fc60e472816878257b401d005caa072ebb26c4c458f9560
[INFO] running `Command { std: "docker" "start" "-a" "fc7958086797a8e34fc60e472816878257b401d005caa072ebb26c4c458f9560", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]     Checking libc v0.2.40
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking rand_core v0.1.0-pre.0
[INFO] [stderr]    Compiling rustc_version v0.2.2
[INFO] [stderr]    Compiling sdl2-sys v0.31.0
[INFO] [stderr]    Compiling im v10.0.0
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking rand v0.5.0-pre.0
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]     Checking num-iter v0.1.35
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking sdl2 v0.31.0
[INFO] [stderr]  Documenting game-loop 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(duration_extras)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `game-loop`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name game_loop src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=0f2fc5096176f55d -L dependency=/opt/rustwide/target/debug/deps --extern im=/opt/rustwide/target/debug/deps/libim-4081270079f56a20.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-219d29a7fbf88527.rmeta --extern sdl2=/opt/rustwide/target/debug/deps/libsdl2-b74af1a4467fc796.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "fc7958086797a8e34fc60e472816878257b401d005caa072ebb26c4c458f9560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc7958086797a8e34fc60e472816878257b401d005caa072ebb26c4c458f9560", kill_on_drop: false }`
[INFO] [stdout] fc7958086797a8e34fc60e472816878257b401d005caa072ebb26c4c458f9560