[INFO] cloning repository https://github.com/philmcminn/rust-sudoku
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/philmcminn/rust-sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilmcminn%2Frust-sudoku"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilmcminn%2Frust-sudoku'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9e4071f0b01ef874a4f532973ee998e614b8ce4b
[INFO] checking philmcminn/rust-sudoku against try#879b8cb7dc2ad9102994457e73cf78d124926ea5 for pr-73084
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilmcminn%2Frust-sudoku" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/philmcminn/rust-sudoku on toolchain 879b8cb7dc2ad9102994457e73cf78d124926ea5
[INFO] running `"/workspace/cargo-home/bin/cargo" "+879b8cb7dc2ad9102994457e73cf78d124926ea5" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/philmcminn/rust-sudoku
[INFO] finished tweaking git repo https://github.com/philmcminn/rust-sudoku
[INFO] tweaked toml for git repo https://github.com/philmcminn/rust-sudoku written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/philmcminn/rust-sudoku already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+879b8cb7dc2ad9102994457e73cf78d124926ea5" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+879b8cb7dc2ad9102994457e73cf78d124926ea5" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3a555e3e5abec67ffd8bce6d87e7291e074fadd8d4e9edabf855622e8437006d
[INFO] running `"docker" "start" "-a" "3a555e3e5abec67ffd8bce6d87e7291e074fadd8d4e9edabf855622e8437006d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `super::Sudoku`
[INFO] [stderr]    --> src/sudoku.rs:328:9
[INFO] [stderr]     |
[INFO] [stderr] 328 |     use super::Sudoku;
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::DLX`
[INFO] [stderr]    --> src/dlx.rs:318:9
[INFO] [stderr]     |
[INFO] [stderr] 318 |     use super::DLX;
[INFO] [stderr]     |         ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::Sudoku`
[INFO] [stderr]    --> src/solver.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 |     use super::Sudoku;
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::DLX`
[INFO] [stderr]    --> src/solver.rs:101:9
[INFO] [stderr]     |
[INFO] [stderr] 101 |     use super::DLX;
[INFO] [stderr]     |         ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::super::solver`
[INFO] [stderr]    --> src/solver.rs:102:9
[INFO] [stderr]     |
[INFO] [stderr] 102 |     use super::super::solver; // TODO: is there a better way to state this
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::DLX`
[INFO] [stderr]    --> src/solver.rs:101:9
[INFO] [stderr]     |
[INFO] [stderr] 101 |     use super::DLX;
[INFO] [stderr]     |         ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `block_dimension`
[INFO] [stderr]    --> src/sudoku.rs:100:12
[INFO] [stderr]     |
[INFO] [stderr] 100 |     pub fn block_dimension(&self) -> usize {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_completed`
[INFO] [stderr]    --> src/sudoku.rs:152:12
[INFO] [stderr]     |
[INFO] [stderr] 152 |     pub fn is_completed(&self) -> bool {
[INFO] [stderr]     |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `block_for_cell_iter`
[INFO] [stderr]    --> src/sudoku.rs:264:12
[INFO] [stderr]     |
[INFO] [stderr] 264 |     pub fn block_for_cell_iter(sudoku: &Sudoku, cell: (usize, usize)) -> Iterator {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `block_dimension`
[INFO] [stderr]    --> src/sudoku.rs:100:12
[INFO] [stderr]     |
[INFO] [stderr] 100 |     pub fn block_dimension(&self) -> usize {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `block_for_cell_iter`
[INFO] [stderr]    --> src/sudoku.rs:264:12
[INFO] [stderr]     |
[INFO] [stderr] 264 |     pub fn block_for_cell_iter(sudoku: &Sudoku, cell: (usize, usize)) -> Iterator {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `"docker" "inspect" "3a555e3e5abec67ffd8bce6d87e7291e074fadd8d4e9edabf855622e8437006d"`
[INFO] running `"docker" "rm" "-f" "3a555e3e5abec67ffd8bce6d87e7291e074fadd8d4e9edabf855622e8437006d"`
[INFO] [stdout] 3a555e3e5abec67ffd8bce6d87e7291e074fadd8d4e9edabf855622e8437006d