[INFO] cloning repository https://github.com/Flinner/CHIP-8_Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Flinner/CHIP-8_Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFlinner%2FCHIP-8_Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFlinner%2FCHIP-8_Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 700fbc638968f3309d4e22713f55a02e91c683da
[INFO] documenting Flinner/CHIP-8_Rust 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%2FFlinner%2FCHIP-8_Rust" "/workspace/builds/worker-31/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-31/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Flinner/CHIP-8_Rust 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/Flinner/CHIP-8_Rust
[INFO] finished tweaking git repo https://github.com/Flinner/CHIP-8_Rust
[INFO] tweaked toml for git repo https://github.com/Flinner/CHIP-8_Rust written to /workspace/builds/worker-31/source/Cargo.toml
[INFO] crate git repo https://github.com/Flinner/CHIP-8_Rust 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-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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] 5847f8df1ec8ecd28127f3733953b731bb99894907165ea19c757ea4f5f6f243
[INFO] running `Command { std: "docker" "start" "-a" "5847f8df1ec8ecd28127f3733953b731bb99894907165ea19c757ea4f5f6f243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5847f8df1ec8ecd28127f3733953b731bb99894907165ea19c757ea4f5f6f243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5847f8df1ec8ecd28127f3733953b731bb99894907165ea19c757ea4f5f6f243", kill_on_drop: false }`
[INFO] [stdout] 5847f8df1ec8ecd28127f3733953b731bb99894907165ea19c757ea4f5f6f243
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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] cdfc4395821ae0c0b154632b37b6cca34776eeab48fa448d41e731c791184059
[INFO] running `Command { std: "docker" "start" "-a" "cdfc4395821ae0c0b154632b37b6cca34776eeab48fa448d41e731c791184059", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling fs_extra v1.2.0
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]    Compiling cmake v0.1.48
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]    Compiling raylib-sys v3.7.0
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]     Checking raylib v3.7.0
[INFO] [stderr]  Documenting chip-8 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(let_chains)]
[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 `chip-8`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name chip_8 src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=38dabee1f2128ba9 -L dependency=/opt/rustwide/target/debug/deps --extern log=/opt/rustwide/target/debug/deps/liblog-250758b0906e1967.rmeta --extern pretty_env_logger=/opt/rustwide/target/debug/deps/libpretty_env_logger-e7c1a6601e1b1e46.rmeta --extern raylib=/opt/rustwide/target/debug/deps/libraylib-2aaa070324d23615.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "cdfc4395821ae0c0b154632b37b6cca34776eeab48fa448d41e731c791184059", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdfc4395821ae0c0b154632b37b6cca34776eeab48fa448d41e731c791184059", kill_on_drop: false }`
[INFO] [stdout] cdfc4395821ae0c0b154632b37b6cca34776eeab48fa448d41e731c791184059