[INFO] cloning repository https://github.com/bczhc/brainfuck-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bczhc/brainfuck-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbczhc%2Fbrainfuck-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbczhc%2Fbrainfuck-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1c6c1eb4cb0fea85391e5b91fa500363ac495791
[INFO] documenting bczhc/brainfuck-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%2Fbczhc%2Fbrainfuck-rust" "/workspace/builds/worker-37/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-37/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bczhc/brainfuck-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/bczhc/brainfuck-rust
[INFO] finished tweaking git repo https://github.com/bczhc/brainfuck-rust
[INFO] tweaked toml for git repo https://github.com/bczhc/brainfuck-rust written to /workspace/builds/worker-37/source/Cargo.toml
[INFO] crate git repo https://github.com/bczhc/brainfuck-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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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] 6d29b3d0fa73fb31006d509c0403188de9a017af13dc2191d07ca5f0f8394580
[INFO] running `Command { std: "docker" "start" "-a" "6d29b3d0fa73fb31006d509c0403188de9a017af13dc2191d07ca5f0f8394580", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d29b3d0fa73fb31006d509c0403188de9a017af13dc2191d07ca5f0f8394580", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d29b3d0fa73fb31006d509c0403188de9a017af13dc2191d07ca5f0f8394580", kill_on_drop: false }`
[INFO] [stdout] 6d29b3d0fa73fb31006d509c0403188de9a017af13dc2191d07ca5f0f8394580
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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] e3a263e1344344f1d599c8b718ab60a1b4c63c2c7a3efa8fb7bd825b14b2a116
[INFO] running `Command { std: "docker" "start" "-a" "e3a263e1344344f1d599c8b718ab60a1b4c63c2c7a3efa8fb7bd825b14b2a116", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking quick-error v2.0.1
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v3.1.2
[INFO] [stderr]  Documenting brainfuck v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking brainfuck v1.0.0 (/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(mixed_integer_ops)]
[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 `brainfuck`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type bin --crate-name bf 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=51faa5ed58bc3db7 -L dependency=/opt/rustwide/target/debug/deps --extern brainfuck=/opt/rustwide/target/debug/deps/libbrainfuck-95ba14d7772095e8.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-cc1dccfb40e56bd3.rmeta --extern quick_error=/opt/rustwide/target/debug/deps/libquick_error-9d7fb830cf42a5b6.rmeta --cap-lints=warn --crate-version 1.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e3a263e1344344f1d599c8b718ab60a1b4c63c2c7a3efa8fb7bd825b14b2a116", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3a263e1344344f1d599c8b718ab60a1b4c63c2c7a3efa8fb7bd825b14b2a116", kill_on_drop: false }`
[INFO] [stdout] e3a263e1344344f1d599c8b718ab60a1b4c63c2c7a3efa8fb7bd825b14b2a116