[INFO] cloning repository https://github.com/Skipants/sudoku_solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Skipants/sudoku_solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSkipants%2Fsudoku_solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSkipants%2Fsudoku_solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e2213d71b3e001dfb5997b07e26b3b21ccf97fd6
[INFO] documenting Skipants/sudoku_solver 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%2FSkipants%2Fsudoku_solver" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Skipants/sudoku_solver 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/Skipants/sudoku_solver
[INFO] finished tweaking git repo https://github.com/Skipants/sudoku_solver
[INFO] tweaked toml for git repo https://github.com/Skipants/sudoku_solver written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/Skipants/sudoku_solver 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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stdout] 4eee9362f02bf271d5cab465aeeeb746d05b0a19d72e029b104bd6b5d5e88aad
[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" "4eee9362f02bf271d5cab465aeeeb746d05b0a19d72e029b104bd6b5d5e88aad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4eee9362f02bf271d5cab465aeeeb746d05b0a19d72e029b104bd6b5d5e88aad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4eee9362f02bf271d5cab465aeeeb746d05b0a19d72e029b104bd6b5d5e88aad", kill_on_drop: false }`
[INFO] [stdout] 4eee9362f02bf271d5cab465aeeeb746d05b0a19d72e029b104bd6b5d5e88aad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] fff609722cf4d44bb505819ca6e7acb2860b1c935f60ab26673ad1a474981c3f
[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" "fff609722cf4d44bb505819ca6e7acb2860b1c935f60ab26673ad1a474981c3f", kill_on_drop: false }`
[INFO] [stderr]  Documenting sudoku_solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0583]: file not found for module `sole_candidate`
[INFO] [stdout]  --> src/strategies/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod sole_candidate;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `sole_candidate`, create file "src/strategies/sole_candidate.rs"
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `sudoku_cell_bitmask`
[INFO] [stdout]  --> src/strategies/column_row_exclusion.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use sudoku_cell_bitmask;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^ no `sudoku_cell_bitmask` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `sudoku_cell_bitmask`
[INFO] [stdout]  --> src/strategies/unique_candidate.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use sudoku_cell_bitmask;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^ no `sudoku_cell_bitmask` in the root
[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: E0432, E0583.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `sudoku_solver`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name sudoku_solver 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 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "fff609722cf4d44bb505819ca6e7acb2860b1c935f60ab26673ad1a474981c3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fff609722cf4d44bb505819ca6e7acb2860b1c935f60ab26673ad1a474981c3f", kill_on_drop: false }`
[INFO] [stdout] fff609722cf4d44bb505819ca6e7acb2860b1c935f60ab26673ad1a474981c3f