[INFO] cloning repository https://github.com/snoyberg/rummikub-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/snoyberg/rummikub-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsnoyberg%2Frummikub-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsnoyberg%2Frummikub-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 10b65c6c5e7b855ff687a6b2640f29c97d6d1a0f
[INFO] documenting snoyberg/rummikub-solver against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsnoyberg%2Frummikub-solver" "/workspace/builds/worker-30/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-30/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/snoyberg/rummikub-solver on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-30/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/snoyberg/rummikub-solver
[INFO] finished tweaking git repo https://github.com/snoyberg/rummikub-solver
[INFO] tweaked toml for git repo https://github.com/snoyberg/rummikub-solver written to /workspace/builds/worker-30/source/Cargo.toml
[INFO] crate git repo https://github.com/snoyberg/rummikub-solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 735dee09c896f9cb4ec549a2dba39ea5806bd951d3d3fb859688e74837176a5e
[INFO] running `Command { std: "docker" "start" "-a" "735dee09c896f9cb4ec549a2dba39ea5806bd951d3d3fb859688e74837176a5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "735dee09c896f9cb4ec549a2dba39ea5806bd951d3d3fb859688e74837176a5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "735dee09c896f9cb4ec549a2dba39ea5806bd951d3d3fb859688e74837176a5e", kill_on_drop: false }`
[INFO] [stdout] 735dee09c896f9cb4ec549a2dba39ea5806bd951d3d3fb859688e74837176a5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f236616cdaa4c3e757b761b76c56db23fa773d46c7eb01bfcb6eb7c6e314cb9
[INFO] running `Command { std: "docker" "start" "-a" "2f236616cdaa4c3e757b761b76c56db23fa773d46c7eb01bfcb6eb7c6e314cb9", kill_on_drop: false }`
[INFO] [stderr]  Documenting rummikub-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(impl_trait_in_bindings)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: the implementation was not maintainable, the feature may get reintroduced once the current refactorings are done
[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 E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `rummikub-solver`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name rummikub_solver src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=814c2754efe9fe36 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2f236616cdaa4c3e757b761b76c56db23fa773d46c7eb01bfcb6eb7c6e314cb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f236616cdaa4c3e757b761b76c56db23fa773d46c7eb01bfcb6eb7c6e314cb9", kill_on_drop: false }`
[INFO] [stdout] 2f236616cdaa4c3e757b761b76c56db23fa773d46c7eb01bfcb6eb7c6e314cb9