[INFO] cloning repository https://github.com/msiemens/rust-tictactoe
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/msiemens/rust-tictactoe" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmsiemens%2Frust-tictactoe", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmsiemens%2Frust-tictactoe'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a8886bdf40bef1bf5b6c9ea806e9155d6206bcdf
[INFO] documenting msiemens/rust-tictactoe 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%2Fmsiemens%2Frust-tictactoe" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/msiemens/rust-tictactoe 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/msiemens/rust-tictactoe
[INFO] finished tweaking git repo https://github.com/msiemens/rust-tictactoe
[INFO] tweaked toml for git repo https://github.com/msiemens/rust-tictactoe written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/msiemens/rust-tictactoe 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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 8b7c261ee488b06811b16b024a2d44af537387f5fbe1668346d28a2f4a9dd3c4
[INFO] running `Command { std: "docker" "start" "-a" "8b7c261ee488b06811b16b024a2d44af537387f5fbe1668346d28a2f4a9dd3c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b7c261ee488b06811b16b024a2d44af537387f5fbe1668346d28a2f4a9dd3c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b7c261ee488b06811b16b024a2d44af537387f5fbe1668346d28a2f4a9dd3c4", kill_on_drop: false }`
[INFO] [stdout] 8b7c261ee488b06811b16b024a2d44af537387f5fbe1668346d28a2f4a9dd3c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 937d98ee1c5d7f00f8fc26d4ca1e3aaa67d90459f8915d14e44f4d42febf3809
[INFO] running `Command { std: "docker" "start" "-a" "937d98ee1c5d7f00f8fc26d4ca1e3aaa67d90459f8915d14e44f4d42febf3809", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking libc v0.2.30
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]    Compiling enum-display-derive v0.1.0
[INFO] [stderr]  Documenting mcts 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(vec_remove_item)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `vec_remove_item`
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(vec_remove_item)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `mcts`
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name mcts 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=ae0087594ad41c1d -L dependency=/opt/rustwide/target/debug/deps --extern enum_display_derive=/opt/rustwide/target/debug/deps/libenum_display_derive-bd9aecfcd74c5e1a.so --extern rand=/opt/rustwide/target/debug/deps/librand-5fa025072350c5a7.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "937d98ee1c5d7f00f8fc26d4ca1e3aaa67d90459f8915d14e44f4d42febf3809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "937d98ee1c5d7f00f8fc26d4ca1e3aaa67d90459f8915d14e44f4d42febf3809", kill_on_drop: false }`
[INFO] [stdout] 937d98ee1c5d7f00f8fc26d4ca1e3aaa67d90459f8915d14e44f4d42febf3809