[INFO] updating cached repository beatmadsen/chess
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/beatmadsen/chess
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/beatmadsen/chess" "work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/beatmadsen/chess"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/beatmadsen/chess'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/beatmadsen/chess" "work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/beatmadsen/chess"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/beatmadsen/chess'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e4bd1f56a7ea4da6b7ea9f773601463b3ad9e610
[INFO] sha for GitHub repo beatmadsen/chess: e4bd1f56a7ea4da6b7ea9f773601463b3ad9e610
[INFO] validating manifest of beatmadsen/chess on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of beatmadsen/chess on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing beatmadsen/chess
[INFO] finished frobbing beatmadsen/chess
[INFO] frobbed toml for beatmadsen/chess written to work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/beatmadsen/chess/Cargo.toml
[INFO] started frobbing beatmadsen/chess
[INFO] finished frobbing beatmadsen/chess
[INFO] frobbed toml for beatmadsen/chess written to work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/beatmadsen/chess/Cargo.toml
[INFO] crate beatmadsen/chess already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking beatmadsen/chess against try#99a7498759a22b5684caf798a98b7e90ad9d2443 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-0/try#99a7498759a22b5684caf798a98b7e90ad9d2443:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/beatmadsen/chess:/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" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6d0be0f8d1f329229f77e2d4d5114266363dfd05ad0ea249c533cdd2216ab52f
[INFO] running `"docker" "start" "-a" "6d0be0f8d1f329229f77e2d4d5114266363dfd05ad0ea249c533cdd2216ab52f"`
[INFO] [stderr]     Checking chess v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Pawn`
[INFO] [stderr]   --> src/piece.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub struct Pawn {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Queen`
[INFO] [stderr]   --> src/piece.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub struct Queen {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `King`
[INFO] [stderr]   --> src/piece.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub struct King {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Knight`
[INFO] [stderr]   --> src/piece.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Knight {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Rook`
[INFO] [stderr]   --> src/piece.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub struct Rook {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Square`
[INFO] [stderr]  --> src/square.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Square {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `legal_moves`
[INFO] [stderr]   --> src/square.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn legal_moves(&self) -> Vec<(Name, Name)> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Position`
[INFO] [stderr]   --> src/square.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Position {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `legal_moves`
[INFO] [stderr]   --> src/square.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn legal_moves(&self) -> Vec<(Name, Name)> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pawn`
[INFO] [stderr]   --> src/piece.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub struct Pawn {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Queen`
[INFO] [stderr]   --> src/piece.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub struct Queen {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `King`
[INFO] [stderr]   --> src/piece.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub struct King {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Knight`
[INFO] [stderr]   --> src/piece.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Knight {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Rook`
[INFO] [stderr]   --> src/piece.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub struct Rook {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Square`
[INFO] [stderr]  --> src/square.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Square {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `legal_moves`
[INFO] [stderr]   --> src/square.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn legal_moves(&self) -> Vec<(Name, Name)> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Position`
[INFO] [stderr]   --> src/square.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Position {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `legal_moves`
[INFO] [stderr]   --> src/square.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn legal_moves(&self) -> Vec<(Name, Name)> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `"docker" "inspect" "6d0be0f8d1f329229f77e2d4d5114266363dfd05ad0ea249c533cdd2216ab52f"`
[INFO] running `"docker" "rm" "-f" "6d0be0f8d1f329229f77e2d4d5114266363dfd05ad0ea249c533cdd2216ab52f"`
[INFO] [stdout] 6d0be0f8d1f329229f77e2d4d5114266363dfd05ad0ea249c533cdd2216ab52f