[INFO] updating cached repository djmcgill/Rubble
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/djmcgill/Rubble
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/djmcgill/Rubble" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/djmcgill/Rubble"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/djmcgill/Rubble'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/djmcgill/Rubble" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/djmcgill/Rubble"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/djmcgill/Rubble'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b8c402cc473c9773d9ec832bb31f4b5d00509c31
[INFO] sha for GitHub repo djmcgill/Rubble: b8c402cc473c9773d9ec832bb31f4b5d00509c31
[INFO] validating manifest of djmcgill/Rubble on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of djmcgill/Rubble on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing djmcgill/Rubble
[INFO] finished frobbing djmcgill/Rubble
[INFO] frobbed toml for djmcgill/Rubble written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/djmcgill/Rubble/Cargo.toml
[INFO] started frobbing djmcgill/Rubble
[INFO] finished frobbing djmcgill/Rubble
[INFO] frobbed toml for djmcgill/Rubble written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/djmcgill/Rubble/Cargo.toml
[INFO] crate djmcgill/Rubble already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking djmcgill/Rubble against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-5/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/djmcgill/Rubble:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9dd905abcf2fd90db1ecfe68d0680a8b4690648e87260bf43d33249b0795a6e4
[INFO] running `"docker" "start" "-a" "9dd905abcf2fd90db1ecfe68d0680a8b4690648e87260bf43d33249b0795a6e4"`
[INFO] [stderr]     Checking rubble v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: constant item is never used: `HAND_LIMIT`
[INFO] [stderr]  --> src/main.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | const HAND_LIMIT: usize = 7;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Placed`
[INFO] [stderr]   --> src/main.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     Placed(char),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Bonus`
[INFO] [stderr]   --> src/main.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     Bonus(Bonus),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DoubleLetter`
[INFO] [stderr]   --> src/main.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     DoubleLetter,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `TripleLetter`
[INFO] [stderr]   --> src/main.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     TripleLetter,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DoubleWord`
[INFO] [stderr]   --> src/main.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     DoubleWord,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `TripleWord`
[INFO] [stderr]   --> src/main.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     TripleWord,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `all_tiles_connected`
[INFO] [stderr]   --> src/main.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     pub fn all_tiles_connected(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Game`
[INFO] [stderr]    --> src/main.rs:128:1
[INFO] [stderr]     |
[INFO] [stderr] 128 | struct Game {
[INFO] [stderr]     | ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:162:13
[INFO] [stderr]     |
[INFO] [stderr] 162 |         let mut board = Board([[Cell::Placed('c'); BOARD_WIDTH]; BOARD_HEIGHT]);
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `HAND_LIMIT`
[INFO] [stderr]  --> src/main.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | const HAND_LIMIT: usize = 7;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Bonus`
[INFO] [stderr]   --> src/main.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     Bonus(Bonus),
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DoubleLetter`
[INFO] [stderr]   --> src/main.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     DoubleLetter,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `TripleLetter`
[INFO] [stderr]   --> src/main.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     TripleLetter,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DoubleWord`
[INFO] [stderr]   --> src/main.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     DoubleWord,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `TripleWord`
[INFO] [stderr]   --> src/main.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     TripleWord,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Game`
[INFO] [stderr]    --> src/main.rs:128:1
[INFO] [stderr]     |
[INFO] [stderr] 128 | struct Game {
[INFO] [stderr]     | ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `"docker" "inspect" "9dd905abcf2fd90db1ecfe68d0680a8b4690648e87260bf43d33249b0795a6e4"`
[INFO] running `"docker" "rm" "-f" "9dd905abcf2fd90db1ecfe68d0680a8b4690648e87260bf43d33249b0795a6e4"`
[INFO] [stdout] 9dd905abcf2fd90db1ecfe68d0680a8b4690648e87260bf43d33249b0795a6e4