[INFO] cloning repository https://github.com/davetttt/ttt_rust_2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/davetttt/ttt_rust_2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavetttt%2Fttt_rust_2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavetttt%2Fttt_rust_2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 44ebdbd5f3afa5acc94ccdcac24f0b487ec608b7
[INFO] documenting davetttt/ttt_rust_2 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavetttt%2Fttt_rust_2" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/davetttt/ttt_rust_2 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/davetttt/ttt_rust_2
[INFO] finished tweaking git repo https://github.com/davetttt/ttt_rust_2
[INFO] tweaked toml for git repo https://github.com/davetttt/ttt_rust_2 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/davetttt/ttt_rust_2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cb1e1c5b8acc666ff40c0b0a75c2584816f28f0e80e35081c2b6b9c7f18a4d9f
[INFO] running `Command { std: "docker" "start" "-a" "cb1e1c5b8acc666ff40c0b0a75c2584816f28f0e80e35081c2b6b9c7f18a4d9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb1e1c5b8acc666ff40c0b0a75c2584816f28f0e80e35081c2b6b9c7f18a4d9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb1e1c5b8acc666ff40c0b0a75c2584816f28f0e80e35081c2b6b9c7f18a4d9f", kill_on_drop: false }`
[INFO] [stdout] cb1e1c5b8acc666ff40c0b0a75c2584816f28f0e80e35081c2b6b9c7f18a4d9f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] faa7e6a7bbc965958e22ab4f680216b2bd19af703061f7df7c7e0db635832194
[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" "faa7e6a7bbc965958e22ab4f680216b2bd19af703061f7df7c7e0db635832194", kill_on_drop: false }`
[INFO] [stderr]  Documenting ttt_rust_2 v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::num::Float`
[INFO] [stdout]  --> src/board.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::num::Float;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^ no `Float` in `num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::io::BufferedReader`
[INFO] [stdout]  --> src/io.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::BufferedReader;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^ no `BufferedReader` in `io`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find derive macro `Show` in this scope
[INFO] [stdout]  --> src/token.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[derive(PartialEq, Show)] // so that tokens can be compared
[INFO] [stdout]   |                     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `ttt_rust_2`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name ttt_rust_2 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 --cap-lints=warn --crate-version 0.0.1` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "faa7e6a7bbc965958e22ab4f680216b2bd19af703061f7df7c7e0db635832194", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "faa7e6a7bbc965958e22ab4f680216b2bd19af703061f7df7c7e0db635832194", kill_on_drop: false }`
[INFO] [stdout] faa7e6a7bbc965958e22ab4f680216b2bd19af703061f7df7c7e0db635832194