[INFO] cloning repository https://github.com/tomscallon/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/tomscallon/sudoku-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomscallon%2Fsudoku-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomscallon%2Fsudoku-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1ce17c3776b3a96bb653b88232b5dfabefc30c9e
[INFO] checking tomscallon/sudoku-solver against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftomscallon%2Fsudoku-solver" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tomscallon/sudoku-solver on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tomscallon/sudoku-solver
[INFO] finished tweaking git repo https://github.com/tomscallon/sudoku-solver
[INFO] tweaked toml for git repo https://github.com/tomscallon/sudoku-solver written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/tomscallon/sudoku-solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "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] 79767e8b4af1ad001af5ce688f6f391bdf877c2e3548551b88fb273e7886239a
[INFO] running `Command { std: "docker" "start" "-a" "79767e8b4af1ad001af5ce688f6f391bdf877c2e3548551b88fb273e7886239a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79767e8b4af1ad001af5ce688f6f391bdf877c2e3548551b88fb273e7886239a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79767e8b4af1ad001af5ce688f6f391bdf877c2e3548551b88fb273e7886239a", kill_on_drop: false }`
[INFO] [stdout] 79767e8b4af1ad001af5ce688f6f391bdf877c2e3548551b88fb273e7886239a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] e23d59c05a060a97d9da0ceacd60531bb58fedd14e66ecf892bde5fcaca9fc41
[INFO] running `Command { std: "docker" "start" "-a" "e23d59c05a060a97d9da0ceacd60531bb58fedd14e66ecf892bde5fcaca9fc41", kill_on_drop: false }`
[INFO] [stderr]     Checking sudoku-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stdout]   --> src/constraints/typedefs.rs:35:7
[INFO] [stdout]    |
[INFO] [stdout] 35 |       0..3 => CellPosition::START,
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #37854 <https://github.com/rust-lang/rust/issues/37854> for more information
[INFO] [stdout]    = help: add `#![feature(exclusive_range_pattern)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stdout]   --> src/constraints/typedefs.rs:36:7
[INFO] [stdout]    |
[INFO] [stdout] 36 |       3..6 => CellPosition::MIDDLE,
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #37854 <https://github.com/rust-lang/rust/issues/37854> for more information
[INFO] [stdout]    = help: add `#![feature(exclusive_range_pattern)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stdout]   --> src/constraints/typedefs.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 |       6..9 => CellPosition::END,
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #37854 <https://github.com/rust-lang/rust/issues/37854> for more information
[INFO] [stdout]    = help: add `#![feature(exclusive_range_pattern)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stdout]   --> src/constraints/typedefs.rs:35:7
[INFO] [stdout]    |
[INFO] [stdout] 35 |       0..3 => CellPosition::START,
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #37854 <https://github.com/rust-lang/rust/issues/37854> for more information
[INFO] [stdout]    = help: add `#![feature(exclusive_range_pattern)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stdout]   --> src/constraints/typedefs.rs:36:7
[INFO] [stdout]    |
[INFO] [stdout] 36 |       3..6 => CellPosition::MIDDLE,
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #37854 <https://github.com/rust-lang/rust/issues/37854> for more information
[INFO] [stdout]    = help: add `#![feature(exclusive_range_pattern)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: exclusive range pattern syntax is experimental
[INFO] [stdout]   --> src/constraints/typedefs.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 |       6..9 => CellPosition::END,
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #37854 <https://github.com/rust-lang/rust/issues/37854> for more information
[INFO] [stdout]    = help: add `#![feature(exclusive_range_pattern)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sudoku-solver`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e23d59c05a060a97d9da0ceacd60531bb58fedd14e66ecf892bde5fcaca9fc41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e23d59c05a060a97d9da0ceacd60531bb58fedd14e66ecf892bde5fcaca9fc41", kill_on_drop: false }`
[INFO] [stdout] e23d59c05a060a97d9da0ceacd60531bb58fedd14e66ecf892bde5fcaca9fc41