[INFO] cloning repository https://github.com/billthemaxster/twenty_forty_eigth
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/billthemaxster/twenty_forty_eigth" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbillthemaxster%2Ftwenty_forty_eigth", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbillthemaxster%2Ftwenty_forty_eigth'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 086545286b7c37c11b2cb8f98b457addc89d8dfc
[INFO] checking billthemaxster/twenty_forty_eigth against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbillthemaxster%2Ftwenty_forty_eigth" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/billthemaxster/twenty_forty_eigth on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/billthemaxster/twenty_forty_eigth
[INFO] finished tweaking git repo https://github.com/billthemaxster/twenty_forty_eigth
[INFO] tweaked toml for git repo https://github.com/billthemaxster/twenty_forty_eigth written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/billthemaxster/twenty_forty_eigth already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d49ea6883877beeb0803c83177caa69bd6819bfb50cca983e187c46534b03b99
[INFO] running `Command { std: "docker" "start" "-a" "d49ea6883877beeb0803c83177caa69bd6819bfb50cca983e187c46534b03b99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d49ea6883877beeb0803c83177caa69bd6819bfb50cca983e187c46534b03b99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d49ea6883877beeb0803c83177caa69bd6819bfb50cca983e187c46534b03b99", kill_on_drop: false }`
[INFO] [stdout] d49ea6883877beeb0803c83177caa69bd6819bfb50cca983e187c46534b03b99
[INFO] running `Command { std: "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" "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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9b4b3c3d246ff03e7bcc4a28644ffa3a45ccfab844355d554515a6fed40629be
[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" "9b4b3c3d246ff03e7bcc4a28644ffa3a45ccfab844355d554515a6fed40629be", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling rstest v0.6.4
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking twenty_forty_eight v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `get_grid`
[INFO] [stdout]   --> src/engine/game.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn get_grid(&self) -> &Grid {
[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: `perform_move`
[INFO] [stdout]   --> src/engine/game.rs:67:12
[INFO] [stdout]    |
[INFO] [stdout] 67 |     pub fn perform_move(&mut self, direction: MoveDirection) -> Result<(), &'static str> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `perform_move_down`
[INFO] [stdout]   --> src/engine/game.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn perform_move_down(&mut self) -> Result<Vec<Tile>, &'static str> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `perform_shunt_down`
[INFO] [stdout]   --> src/engine/game.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn perform_shunt_down(&mut self, column_index: u8) -> Result<bool, &'static str> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `MoveDirection`
[INFO] [stdout]    --> src/engine/game.rs:119:10
[INFO] [stdout]     |
[INFO] [stdout] 119 | pub enum MoveDirection {
[INFO] [stdout]     |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `move_tile`
[INFO] [stdout]   --> src/engine/grid.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn move_tile(&mut self, current_position: GridCoord, new_position: GridCoord) -> Result<(), &'static str> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_size`
[INFO] [stdout]   --> src/engine/grid.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn get_size(&self) -> u8{
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_equal`
[INFO] [stdout]  --> src/engine/grid_coord.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn is_equal(&self, other: &GridCoord) -> bool {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/engine/game.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 | /         match direction {
[INFO] [stdout] 70 | |             MoveDirection::Down => self.perform_move_down(),
[INFO] [stdout] 71 | |             _ => panic!(),
[INFO] [stdout] 72 | |         };
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_grid`
[INFO] [stdout]   --> src/engine/game.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn get_grid(&self) -> &Grid {
[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: `perform_move`
[INFO] [stdout]   --> src/engine/game.rs:67:12
[INFO] [stdout]    |
[INFO] [stdout] 67 |     pub fn perform_move(&mut self, direction: MoveDirection) -> Result<(), &'static str> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `perform_move_down`
[INFO] [stdout]   --> src/engine/game.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn perform_move_down(&mut self) -> Result<Vec<Tile>, &'static str> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `perform_shunt_down`
[INFO] [stdout]   --> src/engine/game.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn perform_shunt_down(&mut self, column_index: u8) -> Result<bool, &'static str> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `MoveDirection`
[INFO] [stdout]    --> src/engine/game.rs:119:10
[INFO] [stdout]     |
[INFO] [stdout] 119 | pub enum MoveDirection {
[INFO] [stdout]     |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `move_tile`
[INFO] [stdout]   --> src/engine/grid.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn move_tile(&mut self, current_position: GridCoord, new_position: GridCoord) -> Result<(), &'static str> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/engine/game.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 | /         match direction {
[INFO] [stdout] 70 | |             MoveDirection::Down => self.perform_move_down(),
[INFO] [stdout] 71 | |             _ => panic!(),
[INFO] [stdout] 72 | |         };
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.94s
[INFO] running `Command { std: "docker" "inspect" "9b4b3c3d246ff03e7bcc4a28644ffa3a45ccfab844355d554515a6fed40629be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b4b3c3d246ff03e7bcc4a28644ffa3a45ccfab844355d554515a6fed40629be", kill_on_drop: false }`
[INFO] [stdout] 9b4b3c3d246ff03e7bcc4a28644ffa3a45ccfab844355d554515a6fed40629be