[INFO] cloning repository https://github.com/ondrejholik/sudoku_solver_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ondrejholik/sudoku_solver_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fondrejholik%2Fsudoku_solver_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fondrejholik%2Fsudoku_solver_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e9bd12146c66113ef0ea5bf3d1171efda815e0a1
[INFO] testing ondrejholik/sudoku_solver_rust against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fondrejholik%2Fsudoku_solver_rust" "/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/ondrejholik/sudoku_solver_rust on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ondrejholik/sudoku_solver_rust
[INFO] finished tweaking git repo https://github.com/ondrejholik/sudoku_solver_rust
[INFO] tweaked toml for git repo https://github.com/ondrejholik/sudoku_solver_rust written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/ondrejholik/sudoku_solver_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc3dffc2cf743da067735cc6ade47c08fbff6b97bcfb1ed0bed5aff1d110502b
[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" "fc3dffc2cf743da067735cc6ade47c08fbff6b97bcfb1ed0bed5aff1d110502b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc3dffc2cf743da067735cc6ade47c08fbff6b97bcfb1ed0bed5aff1d110502b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc3dffc2cf743da067735cc6ade47c08fbff6b97bcfb1ed0bed5aff1d110502b", kill_on_drop: false }`
[INFO] [stdout] fc3dffc2cf743da067735cc6ade47c08fbff6b97bcfb1ed0bed5aff1d110502b
[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" "RUSTFLAGS=--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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b1625a872fb02fc9abc010f6f020bbdd768df431a2e6e659c3bf6fe62e45aec
[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" "1b1625a872fb02fc9abc010f6f020bbdd768df431a2e6e659c3bf6fe62e45aec", kill_on_drop: false }`
[INFO] [stderr]    Compiling sudoku_solver_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0425]: cannot find value `e` in this scope
[INFO] [stdout]   --> src/main.rs:27:20
[INFO] [stdout]    |
[INFO] [stdout] 27 |             empty: e
[INFO] [stdout]    |                    ^ help: a local variable with a similar name exists: `b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0560]: struct `Sudoku` has no field named `empty`
[INFO] [stdout]   --> src/main.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |             empty: e
[INFO] [stdout]    |             ^^^^^ `Sudoku` does not have this field
[INFO] [stdout]    |
[INFO] [stdout]    = note: available fields are: `board`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0560.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sudoku_solver_rust`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "1b1625a872fb02fc9abc010f6f020bbdd768df431a2e6e659c3bf6fe62e45aec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b1625a872fb02fc9abc010f6f020bbdd768df431a2e6e659c3bf6fe62e45aec", kill_on_drop: false }`
[INFO] [stdout] 1b1625a872fb02fc9abc010f6f020bbdd768df431a2e6e659c3bf6fe62e45aec