[INFO] cloning repository https://github.com/PerfectDemo/ninja_chess
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PerfectDemo/ninja_chess" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPerfectDemo%2Fninja_chess", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPerfectDemo%2Fninja_chess'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ae7847cafcdf0c11db0cd0f6a8494e2e6ee9c829
[INFO] checking PerfectDemo/ninja_chess against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPerfectDemo%2Fninja_chess" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/PerfectDemo/ninja_chess
[INFO] finished tweaking git repo https://github.com/PerfectDemo/ninja_chess
[INFO] tweaked toml for git repo https://github.com/PerfectDemo/ninja_chess written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/PerfectDemo/ninja_chess on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/PerfectDemo/ninja_chess 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" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f0e00ba9a89f702ef72f94bd8d5f5af68d036073f0ca0d99c1d0e3976e0c4e3
[INFO] running `Command { std: "docker" "start" "-a" "2f0e00ba9a89f702ef72f94bd8d5f5af68d036073f0ca0d99c1d0e3976e0c4e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f0e00ba9a89f702ef72f94bd8d5f5af68d036073f0ca0d99c1d0e3976e0c4e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f0e00ba9a89f702ef72f94bd8d5f5af68d036073f0ca0d99c1d0e3976e0c4e3", kill_on_drop: false }`
[INFO] [stdout] 2f0e00ba9a89f702ef72f94bd8d5f5af68d036073f0ca0d99c1d0e3976e0c4e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73078bc90770ac129cbfb6ce9ac44fad9964531de64bec98df41f9cf8156db1e
[INFO] running `Command { std: "docker" "start" "-a" "73078bc90770ac129cbfb6ce9ac44fad9964531de64bec98df41f9cf8156db1e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking ninja_chess v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `max` and `min`
[INFO] [stdout]  --> src/operate/knight.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::cmp::{min, max};
[INFO] [stdout]   |                ^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `STAGE`
[INFO] [stdout]  --> src/operate/knight.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::{PIECES, STAGE, COLOUR};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `from_location` is assigned to, but never used
[INFO] [stdout]   --> src/operate/knight.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |         let mut from_location;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_from_location` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `from_location` is never read
[INFO] [stdout]   --> src/operate/knight.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 | /                     from_location = Location {
[INFO] [stdout] 23 | |                         x: command.from,
[INFO] [stdout] 24 | |                         y: i
[INFO] [stdout] 25 | |                     }
[INFO] [stdout]    | |_____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]   --> src/operate/knight.rs:33:14
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn check(board: &mut Board, location: &(Location, Location)) -> bool {
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `location`
[INFO] [stdout]   --> src/operate/knight.rs:33:33
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn check(board: &mut Board, location: &(Location, Location)) -> bool {
[INFO] [stdout]    |                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_location`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]   --> src/operate/knight.rs:36:22
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn move_location(board: &mut Board, location: &(Location, Location)) {
[INFO] [stdout]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `location`
[INFO] [stdout]   --> src/operate/knight.rs:36:41
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn move_location(board: &mut Board, location: &(Location, Location)) {
[INFO] [stdout]    |                                         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_location`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]   --> src/operate/knight.rs:39:18
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn after_run(board: &mut Board, location: &(Location, Location)) {
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `location`
[INFO] [stdout]   --> src/operate/knight.rs:39:37
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn after_run(board: &mut Board, location: &(Location, Location)) {
[INFO] [stdout]    |                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_location`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Show` is never used
[INFO] [stdout]  --> src/piece.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait Show {
[INFO] [stdout]   |           ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Piece` is never constructed
[INFO] [stdout]   --> src/piece.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Piece<'a> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/piece.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl <'a> Piece<'a> {
[INFO] [stdout]    | ------------------- associated function in this implementation
[INFO] [stdout] 18 |     pub fn new(colour: COLOUR, identity: PIECES) -> Piece<'a> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Board` is never constructed
[INFO] [stdout]  --> src/board.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Board<'a> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `init` and `print` are never used
[INFO] [stdout]    --> src/board.rs:14:12
[INFO] [stdout]     |
[INFO] [stdout]  13 | impl <'a>Board<'a> {
[INFO] [stdout]     | ------------------ associated items in this implementation
[INFO] [stdout]  14 |     pub fn init() -> Board<'a> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 140 |     fn print(&self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Command` is never constructed
[INFO] [stdout]  --> src/parser.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Command {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `parse` is never used
[INFO] [stdout]   --> src/parser.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Command {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 13 |     fn parse<'a>(command: String) -> Result<Command, &'a str> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Location` is never constructed
[INFO] [stdout]   --> src/operate/mod.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Location {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Operate` is never used
[INFO] [stdout]   --> src/operate/mod.rs:15:11
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub trait Operate {
[INFO] [stdout]    |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/operate/mod.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RookOperate` is never constructed
[INFO] [stdout]   --> src/operate/rook.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct RookOperate {}
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `KnightOperate` is never constructed
[INFO] [stdout]   --> src/operate/knight.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct KnightOperate {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `max` and `min`
[INFO] [stdout]  --> src/operate/knight.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::cmp::{min, max};
[INFO] [stdout]   |                ^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `STAGE`
[INFO] [stdout]  --> src/operate/knight.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::{PIECES, STAGE, COLOUR};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `from_location` is assigned to, but never used
[INFO] [stdout]   --> src/operate/knight.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |         let mut from_location;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_from_location` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `from_location` is never read
[INFO] [stdout]   --> src/operate/knight.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 | /                     from_location = Location {
[INFO] [stdout] 23 | |                         x: command.from,
[INFO] [stdout] 24 | |                         y: i
[INFO] [stdout] 25 | |                     }
[INFO] [stdout]    | |_____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]   --> src/operate/knight.rs:33:14
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn check(board: &mut Board, location: &(Location, Location)) -> bool {
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `location`
[INFO] [stdout]   --> src/operate/knight.rs:33:33
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn check(board: &mut Board, location: &(Location, Location)) -> bool {
[INFO] [stdout]    |                                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_location`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]   --> src/operate/knight.rs:36:22
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn move_location(board: &mut Board, location: &(Location, Location)) {
[INFO] [stdout]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `location`
[INFO] [stdout]   --> src/operate/knight.rs:36:41
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn move_location(board: &mut Board, location: &(Location, Location)) {
[INFO] [stdout]    |                                         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_location`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]   --> src/operate/knight.rs:39:18
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn after_run(board: &mut Board, location: &(Location, Location)) {
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `location`
[INFO] [stdout]   --> src/operate/knight.rs:39:37
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn after_run(board: &mut Board, location: &(Location, Location)) {
[INFO] [stdout]    |                                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_location`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `identity` is never read
[INFO] [stdout]  --> src/parser.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Command {
[INFO] [stdout]   |            ------- field in this struct
[INFO] [stdout] 6 |     pub identity: PIECES,
[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 function `parse` is never used
[INFO] [stdout]   --> src/parser.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Command {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 13 |     fn parse<'a>(command: String) -> Result<Command, &'a str> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> src/operate/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Location {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 11 |     x: usize,
[INFO] [stdout]    |     ^
[INFO] [stdout] 12 |     y: usize,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `check`, `move_location`, and `after_run` are never used
[INFO] [stdout]   --> src/operate/mod.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub trait Operate {
[INFO] [stdout]    |           ------- associated functions in this trait
[INFO] [stdout] 16 |     fn final_location(board: &mut Board, command: &Command, colour: &COLOUR) -> Result<(Location, Location), String>;
[INFO] [stdout] 17 |     fn check(board: &mut Board, location: &(Location, Location)) -> bool;
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 18 |     fn move_location(board: &mut Board, location: &(Location, Location));
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 19 |     fn after_run(board: &mut Board, location: &(Location, Location));
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/operate/mod.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `KnightOperate` is never constructed
[INFO] [stdout]   --> src/operate/knight.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct KnightOperate {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.49s
[INFO] running `Command { std: "docker" "inspect" "73078bc90770ac129cbfb6ce9ac44fad9964531de64bec98df41f9cf8156db1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73078bc90770ac129cbfb6ce9ac44fad9964531de64bec98df41f9cf8156db1e", kill_on_drop: false }`
[INFO] [stdout] 73078bc90770ac129cbfb6ce9ac44fad9964531de64bec98df41f9cf8156db1e