[INFO] cloning repository https://github.com/gobith/tafl
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gobith/tafl" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgobith%2Ftafl", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgobith%2Ftafl'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5668342a37d589dc0925dbcdf55cbd50fedddfba
[INFO] testing gobith/tafl against beta-2026-01-20 for beta-1.94-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgobith%2Ftafl" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/gobith/tafl
[INFO] finished tweaking git repo https://github.com/gobith/tafl
[INFO] tweaked toml for git repo https://github.com/gobith/tafl written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/gobith/tafl on toolchain beta-2026-01-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/gobith/tafl already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9b2811f944abfd9c152ae8cc42b6c59e1e76805bb8c185b772a014a9aa321a72
[INFO] running `Command { std: "docker" "start" "-a" "9b2811f944abfd9c152ae8cc42b6c59e1e76805bb8c185b772a014a9aa321a72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9b2811f944abfd9c152ae8cc42b6c59e1e76805bb8c185b772a014a9aa321a72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b2811f944abfd9c152ae8cc42b6c59e1e76805bb8c185b772a014a9aa321a72", kill_on_drop: false }`
[INFO] [stdout] 9b2811f944abfd9c152ae8cc42b6c59e1e76805bb8c185b772a014a9aa321a72
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce2f70f64f6ecdf28fc5553aac11c6621c598ac1a016b7982a67affa867e5788
[INFO] running `Command { std: "docker" "start" "-a" "ce2f70f64f6ecdf28fc5553aac11c6621c598ac1a016b7982a67affa867e5788", kill_on_drop: false }`
[INFO] [stderr]    Compiling tafl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function `from` is never used
[INFO] [stdout]   --> src/position.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Position {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 14 |     pub fn from(int: i32) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `from` and `brandubh` are never used
[INFO] [stdout]   --> src/tafl_old.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 42 | impl Tafl {
[INFO] [stdout]    | --------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 76 |     pub fn from(tfl: &str) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 98 |     pub fn brandubh() -> Self {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Brandubh` is never constructed
[INFO] [stdout]  --> src/brandubh.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Brandubh {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/brandubh.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Brandubh {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 10 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Hnefatafl` is never constructed
[INFO] [stdout]  --> src/hnefatafl.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Hnefatafl {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/hnefatafl.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Hnefatafl {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] 10 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tafl` is never constructed
[INFO] [stdout]  --> src/tafl.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Tafl<const N: usize> {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `State` is never constructed
[INFO] [stdout]   --> src/tafl.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct State<const N: usize> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hnefatafl` is never used
[INFO] [stdout]   --> src/tafl.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn hnefatafl() -> Tafl<121> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `brandubh` is never used
[INFO] [stdout]   --> src/tafl.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn brandubh() -> Tafl<49> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `move_piece` is never used
[INFO] [stdout]   --> src/tafl.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 96 | impl<const N: usize> Tafl<N> {
[INFO] [stdout]    | ---------------------------- method in this implementation
[INFO] [stdout] 97 |     pub fn move_piece(&mut self, start_idx: usize, end_idx: usize) -> () {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `switch_side`, `move_piece`, `validate_move`, and `next_state` are never used
[INFO] [stdout]    --> src/tafl.rs:116:8
[INFO] [stdout]     |
[INFO] [stdout] 111 | impl<const N: usize> State<N> {
[INFO] [stdout]     | ----------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 116 |     fn switch_side(&mut self) -> () {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 123 |     fn move_piece(&self, start_idx: usize, end_idx: usize) -> Result<State<N>, String> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 151 |     fn validate_move(&self, start_idx: usize, end_idx: usize) -> Result<(), String> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 220 |     fn next_state(&self, start_idx: usize, end_idx: usize) -> State<N> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Tile` is never used
[INFO] [stdout]    --> src/tafl.rs:280:10
[INFO] [stdout]     |
[INFO] [stdout] 280 | pub enum Tile {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_empty` is never used
[INFO] [stdout]    --> src/tafl.rs:290:12
[INFO] [stdout]     |
[INFO] [stdout] 289 | impl Tile {
[INFO] [stdout]     | --------- method in this implementation
[INFO] [stdout] 290 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Side` is never used
[INFO] [stdout]    --> src/tafl.rs:296:6
[INFO] [stdout]     |
[INFO] [stdout] 296 | enum Side {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `tile_is_same_side` and `tile_is_opposite_side` are never used
[INFO] [stdout]    --> src/tafl.rs:302:8
[INFO] [stdout]     |
[INFO] [stdout] 301 | impl Side {
[INFO] [stdout]     | --------- methods in this implementation
[INFO] [stdout] 302 |     fn tile_is_same_side(&self, tile: Tile) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 311 |     fn tile_is_opposite_side(&self, tile: Tile) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "ce2f70f64f6ecdf28fc5553aac11c6621c598ac1a016b7982a67affa867e5788", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce2f70f64f6ecdf28fc5553aac11c6621c598ac1a016b7982a67affa867e5788", kill_on_drop: false }`
[INFO] [stdout] ce2f70f64f6ecdf28fc5553aac11c6621c598ac1a016b7982a67affa867e5788
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f1cca6033e1f4e59f1c3dd536a63180f36be3d12eb44df7d77cbad2c4e9d523
[INFO] running `Command { std: "docker" "start" "-a" "6f1cca6033e1f4e59f1c3dd536a63180f36be3d12eb44df7d77cbad2c4e9d523", kill_on_drop: false }`
[INFO] [stderr]    Compiling tafl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `CastleWithKing` is never constructed
[INFO] [stdout]    --> src/tafl.rs:286:5
[INFO] [stdout]     |
[INFO] [stdout] 280 | pub enum Tile {
[INFO] [stdout]     |          ---- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 286 |     CastleWithKing,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Tile` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `Command { std: "docker" "inspect" "6f1cca6033e1f4e59f1c3dd536a63180f36be3d12eb44df7d77cbad2c4e9d523", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f1cca6033e1f4e59f1c3dd536a63180f36be3d12eb44df7d77cbad2c4e9d523", kill_on_drop: false }`
[INFO] [stdout] 6f1cca6033e1f4e59f1c3dd536a63180f36be3d12eb44df7d77cbad2c4e9d523
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 21a3f1a5604305c11a930867a75de967b52bf7524e058d038aef46e4e5df116c
[INFO] running `Command { std: "docker" "start" "-a" "21a3f1a5604305c11a930867a75de967b52bf7524e058d038aef46e4e5df116c", kill_on_drop: false }`
[INFO] [stderr] warning: variant `CastleWithKing` is never constructed
[INFO] [stderr]    --> src/tafl.rs:286:5
[INFO] [stderr]     |
[INFO] [stderr] 280 | pub enum Tile {
[INFO] [stderr]     |          ---- variant in this enum
[INFO] [stderr] ...
[INFO] [stderr] 286 |     CastleWithKing,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Tile` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tafl` (bin "tafl" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/tafl-7cc9654116c1b5cb)
[INFO] [stdout] 
[INFO] [stdout] running 22 tests
[INFO] [stdout] test tests::test_move::tfl_test_move_piece_left_error ... ok
[INFO] [stdout] test tests::test_move::tfl_test_move_piece_down_error ... ok
[INFO] [stdout] test tests::test_move::tfl_test_move_piece_up_error ... ok
[INFO] [stdout] test tests::tests::tfl_test_brandubh ... ok
[INFO] [stdout] test tests::tests::array_equality ... ok
[INFO] [stdout] test tests::tests::tfl_test_move_piece_up ... ok
[INFO] [stdout] test tests::tests::tfl_test_tafl_brandubh ... ok
[INFO] [stdout] test tests::tests::tfl_test ... ok
[INFO] [stdout] test tests::tests::tfl_test_brandubh_old ... ok
[INFO] [stdout] test tests::tests::tfl_test_hnefatafl ... ok
[INFO] [stdout] test tests::tests::tfl_test_move_piece_capture_right ... ok
[INFO] [stdout] test tests::tests::tfl_test_move_piece_capture_up ... ok
[INFO] [stdout] test tests::tests::tfl_test_tafl_hnefatafl ... ok
[INFO] [stdout] test tests::tests::tfl_test_move_piece_capture_down ... ok
[INFO] [stdout] test tests::tests::tfl_test_move_piece_capture_left ... ok
[INFO] [stdout] test tests::tests::tfl_test_move_wrong_piece ... ok
[INFO] [stdout] test tests::tests::tile_is_empty ... ok
[INFO] [stdout] test tests::test_move::tfl_test_move_piece_right_error ... ok
[INFO] [stdout] test tests::tests::tfl_test_move_piece ... FAILED
[INFO] [stdout] test tests::tests::tfl_test_brandubh_loop_old ... ok
[INFO] [stdout] test tests::tests::tfl_test_brandubh_loop ... ok
[INFO] [stdout] test tests::tests::tfl_test_hnefatafl_loop ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::tests::tfl_test_move_piece stdout ----
[INFO] [stdout] ⬛ 	⬜ 	🔴 	🔴 	🔴 	⬜ 	⬛ 	
[INFO] [stdout]  
[INFO] [stdout]  
[INFO] [stdout] ⬜ 	⬜ 	⬜ 	🔴 	⬜ 	⬜ 	⬜ 	
[INFO] [stdout]  
[INFO] [stdout]  
[INFO] [stdout] 🔴 	⬜ 	⬜ 	⭕ 	⬜ 	⬜ 	🔴 	
[INFO] [stdout]  
[INFO] [stdout]  
[INFO] [stdout] 🔴 	🔴 	⭕ 	⬤ 	⭕ 	🔴 	🔴 	
[INFO] [stdout]  
[INFO] [stdout]  
[INFO] [stdout] 🔴 	⬜ 	⬜ 	⭕ 	⬜ 	⬜ 	🔴 	
[INFO] [stdout]  
[INFO] [stdout]  
[INFO] [stdout] ⬜ 	⬜ 	⬜ 	🔴 	⬜ 	⬜ 	⬜ 	
[INFO] [stdout]  
[INFO] [stdout]  
[INFO] [stdout] ⬛ 	⬜ 	🔴 	🔴 	🔴 	⬜ 	⬛ 	
[INFO] [stdout]  
[INFO] [stdout]  
[INFO] [stdout] Turn: Attacker
[INFO] [stdout] 
[INFO] [stdout] Start_idx 10
[INFO] [stdout] End_idx 7
[INFO] [stdout] Start_row 1
[INFO] [stdout] End_row 1
[INFO] [stdout] Start_column 3
[INFO] [stdout] End_column 0
[INFO] [stdout] Index from End is 8
[INFO] [stdout] Index from End is 9
[INFO] [stdout] 
[INFO] [stdout] thread 'tests::tests::tfl_test_move_piece' (37) panicked at src/tafl.rs:250:21:
[INFO] [stdout] attempt to subtract with overflow
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x56d663b4b832 - std::backtrace_rs::backtrace::libunwind::trace::hf0bd46b30bc61685
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x56d663b4b832 - std::backtrace_rs::backtrace::trace_unsynchronized::h1d1fbb72ad89d7b7
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x56d663b4b832 - std::sys::backtrace::_print_fmt::he38b6f68ca847f47
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x56d663b4b832 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hb7e843cde1bc81a3
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x56d663b5b8ca - core::fmt::rt::Argument::fmt::hc1dd77ac64f2688c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x56d663b5b8ca - core::fmt::write::h952c506e2dbe9cff
[INFO] [stdout]    6:     0x56d663b1a7b6 - std::io::default_write_fmt::hd23bd8145c03a23a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x56d663b1a7b6 - std::io::Write::write_fmt::hdd3314a2bd8a34bd
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x56d663b2ad19 - std::sys::backtrace::BacktraceLock::print::h1079b82381c2c252
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x56d663b2ad19 - std::panicking::default_hook::{{closure}}::h85cb76b8462c00f2
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x56d663b2abb1 - std::panicking::default_hook::h0134d220cc034c02
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x56d663aef25e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb2e68dca3970e3ca
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x56d663aef25e - test::test_main_with_exit_callback::{{closure}}::ha7ec2063a2565ec3
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x56d663b2af92 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::haebee478d0f56cf4
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x56d663b2af92 - std::panicking::panic_with_hook::h8119b6db1fef734f
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x56d663b2ae0a - std::panicking::panic_handler::{{closure}}::h24f5360b91482c0e
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:691:13
[INFO] [stdout]   16:     0x56d663b26369 - std::sys::backtrace::__rust_end_short_backtrace::h4e60c5cbd1bd0108
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x56d663b0f3ad - __rustc[e4c6931bd8050421]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x56d663b62f2c - core::panicking::panic_fmt::hb1614a3ff6840071
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x56d663b62c79 - core::panicking::panic_const::panic_const_sub_overflow::h65ab8bb9d5c6a2db
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panicking.rs:175:17
[INFO] [stdout]   20:     0x56d663ac2931 - tafl::tafl::State<_>::next_state::h1cbacc8520fc9736
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tafl.rs:250:21
[INFO] [stdout]   21:     0x56d663ac2014 - tafl::tafl::State<_>::move_piece::hbbb577a11aef573e
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tafl.rs:130:38
[INFO] [stdout]   22:     0x56d663ac1bdb - tafl::tafl::Tafl<_>::move_piece::h0eeb5da37eb3f422
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tafl.rs:98:26
[INFO] [stdout]   23:     0x56d663ac72e0 - tafl::tests::tests::tfl_test_move_piece::hb2ce19a92e18338f
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tests.rs:111:13
[INFO] [stdout]   24:     0x56d663ac74d7 - tafl::tests::tests::tfl_test_move_piece::{{closure}}::hfef66c4a54f62187
[INFO] [stdout]                                at /opt/rustwide/workdir/src/tests.rs:108:29
[INFO] [stdout]   25:     0x56d663acae36 - core::ops::function::FnOnce::call_once::hcf58932369fb2803
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   26:     0x56d663aef05b - core::ops::function::FnOnce::call_once::hefaf63600cd43d2a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   27:     0x56d663aef05b - test::__rust_begin_short_backtrace::he30322a73a0e9ea6
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:663:18
[INFO] [stdout]   28:     0x56d663b02a2a - test::run_test_in_process::{{closure}}::hdea3ab8d0243ef36
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:74
[INFO] [stdout]   29:     0x56d663b02a2a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h66d192f42498ffce
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   30:     0x56d663b02a2a - std::panicking::catch_unwind::do_call::h822e18e8d3a6bb65
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stdout]   31:     0x56d663b02a2a - std::panicking::catch_unwind::h54b1de7ceab578bf
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stdout]   32:     0x56d663b02a2a - std::panic::catch_unwind::h60c29b7a9d0246b1
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stdout]   33:     0x56d663b02a2a - test::run_test_in_process::h6099b5f871379b13
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:27
[INFO] [stdout]   34:     0x56d663b02a2a - test::run_test::{{closure}}::h926ce0a38281a4c8
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:607:43
[INFO] [stdout]   35:     0x56d663adce84 - test::run_test::{{closure}}::h508de21a9afc7140
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:637:41
[INFO] [stdout]   36:     0x56d663adce84 - std::sys::backtrace::__rust_begin_short_backtrace::h6e2f5c39ca00735a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   37:     0x56d663ae0742 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::h133e44f0e5802c14
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   38:     0x56d663ae0742 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4718c1285283955c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   39:     0x56d663ae0742 - std::panicking::catch_unwind::do_call::h0bba3937b4892238
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stdout]   40:     0x56d663ae0742 - std::panicking::catch_unwind::h5b31cab5fb8c5d7f
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stdout]   41:     0x56d663ae0742 - std::panic::catch_unwind::hb2fa05d52ed0124e
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stdout]   42:     0x56d663ae0742 - std::thread::lifecycle::spawn_unchecked::{{closure}}::hf401cf5ff501bd29
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   43:     0x56d663ae0742 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h160022e94ce3b0bb
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   44:     0x56d663b215ff - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf234e0d1d1d272ba
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   45:     0x56d663b215ff - std::sys::thread::unix::Thread::new::thread_start::h106a295241840d3b
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/thread/unix.rs:127:17
[INFO] [stdout]   46:     0x795277d29aa4 - <unknown>
[INFO] [stdout]   47:     0x795277db6a64 - clone
[INFO] [stdout]   48:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::tests::tfl_test_move_piece
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 21 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 46.89s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin tafl`
[INFO] running `Command { std: "docker" "inspect" "21a3f1a5604305c11a930867a75de967b52bf7524e058d038aef46e4e5df116c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21a3f1a5604305c11a930867a75de967b52bf7524e058d038aef46e4e5df116c", kill_on_drop: false }`
[INFO] [stdout] 21a3f1a5604305c11a930867a75de967b52bf7524e058d038aef46e4e5df116c
