[INFO] updating cached repository https://github.com/spratt/russ
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] efa6ad7cd7f68771a5b4f5c0b145e1769419703c
[INFO] checking spratt/russ against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspratt%2Fruss" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] [stderr] Checking out files:  60% (9/15)   
Checking out files:  66% (10/15)   
Checking out files:  73% (11/15)   
Checking out files:  80% (12/15)   
Checking out files:  86% (13/15)   
Checking out files:  93% (14/15)   
Checking out files: 100% (15/15)   
Checking out files: 100% (15/15), done.
[INFO] validating manifest of git repo https://github.com/spratt/russ on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/spratt/russ
[INFO] finished tweaking git repo https://github.com/spratt/russ
[INFO] tweaked toml for git repo https://github.com/spratt/russ written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/spratt/russ already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-7/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 5ba5ec1e8668aeb87cd1c0b37e14692f273aa31d842167e2f10c6bf6c8c13585
[INFO] running `"docker" "start" "-a" "5ba5ec1e8668aeb87cd1c0b37e14692f273aa31d842167e2f10c6bf6c8c13585"`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking unicode-segmentation v0.1.3
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking russ v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `player`
[INFO] [stderr]    --> src/chess.rs:369:31
[INFO] [stderr]     |
[INFO] [stderr] 369 |     fn find_all_pieces(&self, player: Player, piece: Piece) -> Vec<Posn> {
[INFO] [stderr]     |                               ^^^^^^ help: consider prefixing with an underscore: `_player`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `piece`
[INFO] [stderr]    --> src/chess.rs:369:47
[INFO] [stderr]     |
[INFO] [stderr] 369 |     fn find_all_pieces(&self, player: Player, piece: Piece) -> Vec<Posn> {
[INFO] [stderr]     |                                               ^^^^^ help: consider prefixing with an underscore: `_piece`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `player`
[INFO] [stderr] warning: unused variable: `player`
[INFO] [stderr]    --> src/chess.rs:369:31
[INFO] [stderr]     |
[INFO] [stderr] 369 |     fn find_all_pieces(&self, player: Player, piece: Piece) -> Vec<Posn> {
[INFO] [stderr]     |                               ^^^^^^ help: consider prefixing with an underscore: `_player`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `piece`
[INFO] [stderr]    --> src/chess.rs:369:47
[INFO] [stderr]     |
[INFO] [stderr] 369 |     fn find_all_pieces(&self, player: Player, piece: Piece) -> Vec<Posn> {
[INFO] [stderr]     |                                               ^^^^^ help: consider prefixing with an underscore: `_piece`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `player`
[INFO] [stderr]    --> src/chess.rs:374:35
[INFO] [stderr]     |
[INFO] [stderr] 374 |     fn find_piece_location(&self, player: Player, mov: Move) -> Option<Posn> {
[INFO] [stderr]     |                                   ^^^^^^ help: consider prefixing with an underscore: `_player`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mov`
[INFO] [stderr]    --> src/chess.rs:374:51
[INFO] [stderr]     |
[INFO] [stderr] 374 |     fn find_piece_location(&self, player: Player, mov: Move) -> Option<Posn> {
[INFO] [stderr]     |                                                   ^^^ help: consider prefixing with an underscore: `_mov`
[INFO] [stderr] 
[INFO] [stderr]    --> src/chess.rs:374:35
[INFO] [stderr]     |
[INFO] [stderr] 374 |     fn find_piece_location(&self, player: Player, mov: Move) -> Option<Posn> {
[INFO] [stderr]     |                                   ^^^^^^ help: consider prefixing with an underscore: `_player`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mov`
[INFO] [stderr]    --> src/chess.rs:374:51
[INFO] [stderr]     |
[INFO] [stderr] 374 |     fn find_piece_location(&self, player: Player, mov: Move) -> Option<Posn> {
[INFO] [stderr]     |                                                   ^^^ help: consider prefixing with an underscore: `_mov`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Rook`
[INFO] [stderr]  --> src/chess.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Rook,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Knight`
[INFO] [stderr]  --> src/chess.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Knight,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Bishop`
[INFO] [stderr]  --> src/chess.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     Bishop,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Queen`
[INFO] [stderr]  --> src/chess.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     Queen,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `King`
[INFO] [stderr]   --> src/chess.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     King,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Pawn`
[INFO] [stderr]   --> src/chess.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     Pawn,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_char`
[INFO] [stderr]   --> src/chess.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn to_char(&self) -> char {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from`
[INFO] [stderr]   --> src/chess.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn from(c: char) -> Option<Piece> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Queenside`
[INFO] [stderr]   --> src/chess.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     Queenside,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Kingside`
[INFO] [stderr]   --> src/chess.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     Kingside,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_str`
[INFO] [stderr]   --> src/chess.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     fn to_str(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_str`
[INFO] [stderr]   --> src/chess.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     fn from_str(s: String) -> Option<Castle> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/chess.rs:102:5
[INFO] [stderr]     |
[INFO] [stderr] 102 |     fn new() -> Move {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from`
[INFO] [stderr]    --> src/chess.rs:117:5
[INFO] [stderr]     |
[INFO] [stderr] 117 |     pub fn from(mov_str: &String) -> Move {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_str`
[INFO] [stderr]    --> src/chess.rs:184:5
[INFO] [stderr]     |
[INFO] [stderr] 184 |     pub fn to_str(&self) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from`
[INFO] [stderr]    --> src/chess.rs:302:5
[INFO] [stderr]     |
[INFO] [stderr] 302 |     fn from(s: &String) -> Posn {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Player`
[INFO] [stderr]    --> src/chess.rs:316:1
[INFO] [stderr]     |
[INFO] [stderr] 316 | pub enum Player {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/chess.rs:327:5
[INFO] [stderr]     |
[INFO] [stderr] 327 |     pub fn new() -> State {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `col_from_file`
[INFO] [stderr]    --> src/chess.rs:341:5
[INFO] [stderr]     |
[INFO] [stderr] 341 |     fn col_from_file(f: &char) -> Option<usize> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `row_from_rank`
[INFO] [stderr]    --> src/chess.rs:355:5
[INFO] [stderr]     |
[INFO] [stderr] 355 |     fn row_from_rank(r: &i8) -> Option<usize> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_all_pieces`
[INFO] [stderr]    --> src/chess.rs:369:5
[INFO] [stderr]     |
[INFO] [stderr] 369 |     fn find_all_pieces(&self, player: Player, piece: Piece) -> Vec<Posn> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_piece_location`
[INFO] [stderr]    --> src/chess.rs:374:5
[INFO] [stderr]     |
[INFO] [stderr] 374 |     fn find_piece_location(&self, player: Player, mov: Move) -> Option<Posn> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `make_move`
[INFO] [stderr]    --> src/chess.rs:379:5
[INFO] [stderr]     |
[INFO] [stderr] 379 |     pub fn make_move(&self, player: Player, mov: Move) -> Option<State> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `move_piece`
[INFO] [stderr]    --> src/chess.rs:388:5
[INFO] [stderr]     |
[INFO] [stderr] 388 |     fn move_piece(&self, from: Posn, to: Posn) -> State {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Player`
[INFO] [stderr]    --> src/chess.rs:316:1
[INFO] [stderr]     |
[INFO] [stderr] 316 | pub enum Player {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_all_pieces`
[INFO] [stderr]    --> src/chess.rs:369:5
[INFO] [stderr]     |
[INFO] [stderr] 369 |     fn find_all_pieces(&self, player: Player, piece: Piece) -> Vec<Posn> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_piece_location`
[INFO] [stderr]    --> src/chess.rs:374:5
[INFO] [stderr]     |
[INFO] [stderr] 374 |     fn find_piece_location(&self, player: Player, mov: Move) -> Option<Posn> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `make_move`
[INFO] [stderr]    --> src/chess.rs:379:5
[INFO] [stderr]     |
[INFO] [stderr] 379 |     pub fn make_move(&self, player: Player, mov: Move) -> Option<State> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.96s
[INFO] running `"docker" "inspect" "5ba5ec1e8668aeb87cd1c0b37e14692f273aa31d842167e2f10c6bf6c8c13585"`
[INFO] running `"docker" "rm" "-f" "5ba5ec1e8668aeb87cd1c0b37e14692f273aa31d842167e2f10c6bf6c8c13585"`
[INFO] [stdout] 5ba5ec1e8668aeb87cd1c0b37e14692f273aa31d842167e2f10c6bf6c8c13585