[INFO] cloning repository https://github.com/spratt/russ
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/spratt/russ" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspratt%2Fruss", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspratt%2Fruss'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] efa6ad7cd7f68771a5b4f5c0b145e1769419703c
[INFO] checking spratt/russ against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspratt%2Fruss" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] [stderr] Checking out files:  66% (10/15)   
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[INFO] validating manifest of git repo https://github.com/spratt/russ on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-0/source/Cargo.toml
[INFO] crate git repo https://github.com/spratt/russ already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 97a0ae2bb9dc82f13e9c9ff8ab96dc6fdf78df7f293b96e18aafc99960961523
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "97a0ae2bb9dc82f13e9c9ff8ab96dc6fdf78df7f293b96e18aafc99960961523", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97a0ae2bb9dc82f13e9c9ff8ab96dc6fdf78df7f293b96e18aafc99960961523", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97a0ae2bb9dc82f13e9c9ff8ab96dc6fdf78df7f293b96e18aafc99960961523", kill_on_drop: false }`
[INFO] [stdout] 97a0ae2bb9dc82f13e9c9ff8ab96dc6fdf78df7f293b96e18aafc99960961523
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=forbid" "-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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d0f4e41ea7feb239a82146791d302796c55487c57020b2e6e7041140cff0b356
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d0f4e41ea7feb239a82146791d302796c55487c57020b2e6e7041140cff0b356", kill_on_drop: false }`
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking unicode-segmentation v0.1.3
[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] [stdout] warning: unused variable: `player`
[INFO] [stdout]    --> src/chess.rs:369:31
[INFO] [stdout]     |
[INFO] [stdout] 369 |     fn find_all_pieces(&self, player: Player, piece: Piece) -> Vec<Posn> {
[INFO] [stdout]     |                               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_player`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `piece`
[INFO] [stdout]    --> src/chess.rs:369:47
[INFO] [stdout]     |
[INFO] [stdout] 369 |     fn find_all_pieces(&self, player: Player, piece: Piece) -> Vec<Posn> {
[INFO] [stdout]     |                                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_piece`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `player`
[INFO] [stdout]    --> src/chess.rs:374:35
[INFO] [stdout]     |
[INFO] [stdout] 374 |     fn find_piece_location(&self, player: Player, mov: Move) -> Option<Posn> {
[INFO] [stdout]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mov`
[INFO] [stdout]    --> src/chess.rs:374:51
[INFO] [stdout]     |
[INFO] [stdout] 374 |     fn find_piece_location(&self, player: Player, mov: Move) -> Option<Posn> {
[INFO] [stdout]     |                                                   ^^^ help: if this is intentional, prefix it with an underscore: `_mov`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rook`
[INFO] [stdout]  --> src/chess.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Rook,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Knight`
[INFO] [stdout]  --> src/chess.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Knight,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bishop`
[INFO] [stdout]  --> src/chess.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Bishop,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Queen`
[INFO] [stdout]  --> src/chess.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Queen,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `King`
[INFO] [stdout]   --> src/chess.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     King,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Pawn`
[INFO] [stdout]   --> src/chess.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Pawn,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_char`
[INFO] [stdout]   --> src/chess.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn to_char(&self) -> char {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from`
[INFO] [stdout]   --> src/chess.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn from(c: char) -> Option<Piece> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Queenside`
[INFO] [stdout]   --> src/chess.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     Queenside,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Kingside`
[INFO] [stdout]   --> src/chess.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     Kingside,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_str`
[INFO] [stdout]   --> src/chess.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 |     fn to_str(&self) -> String {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_str`
[INFO] [stdout]   --> src/chess.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn from_str(s: String) -> Option<Castle> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/chess.rs:102:8
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn new() -> Move {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from`
[INFO] [stdout]    --> src/chess.rs:117:12
[INFO] [stdout]     |
[INFO] [stdout] 117 |     pub fn from(mov_str: &String) -> Move {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_str`
[INFO] [stdout]    --> src/chess.rs:184:12
[INFO] [stdout]     |
[INFO] [stdout] 184 |     pub fn to_str(&self) -> String {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from`
[INFO] [stdout]    --> src/chess.rs:302:8
[INFO] [stdout]     |
[INFO] [stdout] 302 |     fn from(s: &String) -> Posn {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Player`
[INFO] [stdout]    --> src/chess.rs:316:10
[INFO] [stdout]     |
[INFO] [stdout] 316 | pub enum Player {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/chess.rs:327:12
[INFO] [stdout]     |
[INFO] [stdout] 327 |     pub fn new() -> State {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `col_from_file`
[INFO] [stdout]    --> src/chess.rs:341:8
[INFO] [stdout]     |
[INFO] [stdout] 341 |     fn col_from_file(f: &char) -> Option<usize> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `row_from_rank`
[INFO] [stdout]    --> src/chess.rs:355:8
[INFO] [stdout]     |
[INFO] [stdout] 355 |     fn row_from_rank(r: &i8) -> Option<usize> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find_all_pieces`
[INFO] [stdout]    --> src/chess.rs:369:8
[INFO] [stdout]     |
[INFO] [stdout] 369 |     fn find_all_pieces(&self, player: Player, piece: Piece) -> Vec<Posn> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find_piece_location`
[INFO] [stdout]    --> src/chess.rs:374:8
[INFO] [stdout]     |
[INFO] [stdout] 374 |     fn find_piece_location(&self, player: Player, mov: Move) -> Option<Posn> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `make_move`
[INFO] [stdout]    --> src/chess.rs:379:12
[INFO] [stdout]     |
[INFO] [stdout] 379 |     pub fn make_move(&self, player: Player, mov: Move) -> Option<State> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `move_piece`
[INFO] [stdout]    --> src/chess.rs:388:8
[INFO] [stdout]     |
[INFO] [stdout] 388 |     fn move_piece(&self, from: Posn, to: Posn) -> State {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 28 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `player`
[INFO] [stdout]    --> src/chess.rs:369:31
[INFO] [stdout]     |
[INFO] [stdout] 369 |     fn find_all_pieces(&self, player: Player, piece: Piece) -> Vec<Posn> {
[INFO] [stdout]     |                               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_player`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `piece`
[INFO] [stdout]    --> src/chess.rs:369:47
[INFO] [stdout]     |
[INFO] [stdout] 369 |     fn find_all_pieces(&self, player: Player, piece: Piece) -> Vec<Posn> {
[INFO] [stdout]     |                                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_piece`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `player`
[INFO] [stdout]    --> src/chess.rs:374:35
[INFO] [stdout]     |
[INFO] [stdout] 374 |     fn find_piece_location(&self, player: Player, mov: Move) -> Option<Posn> {
[INFO] [stdout]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_player`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mov`
[INFO] [stdout]    --> src/chess.rs:374:51
[INFO] [stdout]     |
[INFO] [stdout] 374 |     fn find_piece_location(&self, player: Player, mov: Move) -> Option<Posn> {
[INFO] [stdout]     |                                                   ^^^ help: if this is intentional, prefix it with an underscore: `_mov`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Player`
[INFO] [stdout]    --> src/chess.rs:316:10
[INFO] [stdout]     |
[INFO] [stdout] 316 | pub enum Player {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find_all_pieces`
[INFO] [stdout]    --> src/chess.rs:369:8
[INFO] [stdout]     |
[INFO] [stdout] 369 |     fn find_all_pieces(&self, player: Player, piece: Piece) -> Vec<Posn> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find_piece_location`
[INFO] [stdout]    --> src/chess.rs:374:8
[INFO] [stdout]     |
[INFO] [stdout] 374 |     fn find_piece_location(&self, player: Player, mov: Move) -> Option<Posn> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `make_move`
[INFO] [stdout]    --> src/chess.rs:379:12
[INFO] [stdout]     |
[INFO] [stdout] 379 |     pub fn make_move(&self, player: Player, mov: Move) -> Option<State> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.86s
[INFO] running `Command { std: "docker" "inspect" "d0f4e41ea7feb239a82146791d302796c55487c57020b2e6e7041140cff0b356", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0f4e41ea7feb239a82146791d302796c55487c57020b2e6e7041140cff0b356", kill_on_drop: false }`
[INFO] [stdout] d0f4e41ea7feb239a82146791d302796c55487c57020b2e6e7041140cff0b356