[INFO] cloning repository https://github.com/SicariusNoctis/rs-chess
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SicariusNoctis/rs-chess" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSicariusNoctis%2Frs-chess", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSicariusNoctis%2Frs-chess'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4076e092273e29743302a0a659f5f9c45eb1785d
[INFO] documenting SicariusNoctis/rs-chess against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSicariusNoctis%2Frs-chess" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SicariusNoctis/rs-chess on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SicariusNoctis/rs-chess
[INFO] finished tweaking git repo https://github.com/SicariusNoctis/rs-chess
[INFO] tweaked toml for git repo https://github.com/SicariusNoctis/rs-chess written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/SicariusNoctis/rs-chess already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4eb0e0d511ec1e3fedcfe9c6b4875c2da966c3e93cc37b3c77598c2addaebe7e
[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" "4eb0e0d511ec1e3fedcfe9c6b4875c2da966c3e93cc37b3c77598c2addaebe7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4eb0e0d511ec1e3fedcfe9c6b4875c2da966c3e93cc37b3c77598c2addaebe7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4eb0e0d511ec1e3fedcfe9c6b4875c2da966c3e93cc37b3c77598c2addaebe7e", kill_on_drop: false }`
[INFO] [stdout] 4eb0e0d511ec1e3fedcfe9c6b4875c2da966c3e93cc37b3c77598c2addaebe7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 32d713bdeadba06f1553aa658f5f692bb6b18ff9c9174f519892e3568e845d22
[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" "32d713bdeadba06f1553aa658f5f692bb6b18ff9c9174f519892e3568e845d22", kill_on_drop: false }`
[INFO] [stderr]    Compiling itoa v0.4.2
[INFO] [stderr]    Compiling dtoa v0.4.3
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]    Compiling serde v1.0.70
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]    Compiling syn v0.14.4
[INFO] [stderr]    Compiling serde_derive v1.0.70
[INFO] [stderr]    Compiling serde_json v1.0.24
[INFO] [stderr]    Compiling flame v0.2.2
[INFO] [stderr]    Compiling flamer v0.3.0
[INFO] [stderr]  Documenting rs-chess v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:1:20
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(plugin, custom_attribute)]
[INFO] [stdout]   |                    ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in favor of `#![register_tool]` and `#![register_attr]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `flame` in this scope
[INFO] [stdout]   --> src/search.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 |     #[flame]
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(plugin, custom_attribute)]
[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] Some errors have detailed explanations: E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `rs-chess`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name rs_chess 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 --extern arrayvec=/opt/rustwide/target/debug/deps/libarrayvec-8002436054207dba.rmeta --extern flame=/opt/rustwide/target/debug/deps/libflame-83b4aaeda5c572d4.rmeta --extern flamer=/opt/rustwide/target/debug/deps/libflamer-97bed0522876692f.so --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "32d713bdeadba06f1553aa658f5f692bb6b18ff9c9174f519892e3568e845d22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32d713bdeadba06f1553aa658f5f692bb6b18ff9c9174f519892e3568e845d22", kill_on_drop: false }`
[INFO] [stdout] 32d713bdeadba06f1553aa658f5f692bb6b18ff9c9174f519892e3568e845d22