[INFO] updating cached repository https://github.com/strangelovephd/minesweeper
[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] 9ebc94507a558f3c8f62f0ad5a29af86bbf794e3
[INFO] checking strangelovephd/minesweeper against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstrangelovephd%2Fminesweeper" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/strangelovephd/minesweeper 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/strangelovephd/minesweeper
[INFO] finished tweaking git repo https://github.com/strangelovephd/minesweeper
[INFO] tweaked toml for git repo https://github.com/strangelovephd/minesweeper written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/strangelovephd/minesweeper already has a lockfile, it will not be regenerated
[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] ac6307ed15eb61e9205844ce657dccd3a66f4eca0c0f09372bee55e15b61239d
[INFO] running `"docker" "start" "-a" "ac6307ed15eb61e9205844ce657dccd3a66f4eca0c0f09372bee55e15b61239d"`
[INFO] [stderr]    Compiling serde v1.0.87
[INFO] [stderr]    Compiling num-derive v0.2.4
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]     Checking read_color v1.0.0
[INFO] [stderr]     Checking interpolation v0.2.0
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]     Checking rand_jitter v0.1.2
[INFO] [stderr]     Checking inflate v0.4.4
[INFO] [stderr]     Checking smallvec v0.6.8
[INFO] [stderr]     Checking rand_os v0.1.2
[INFO] [stderr]     Checking nix v0.12.0
[INFO] [stderr]     Checking num_cpus v1.9.0
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]     Checking deflate v0.7.19
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling gl_generator v0.10.0
[INFO] [stderr]     Checking x11-dl v2.18.3
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]     Checking rusttype v0.7.4
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking rand_pcg v0.1.1
[INFO] [stderr]     Checking dlib v0.4.1
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking png v0.14.0
[INFO] [stderr]     Checking wayland-sys v0.21.11
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking andrew v0.1.6
[INFO] [stderr]     Checking piston2d-graphics v0.30.0
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]    Compiling gl v0.11.0
[INFO] [stderr]    Compiling glutin v0.19.0
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking wayland-commons v0.21.11
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]     Checking wayland-client v0.21.11
[INFO] [stderr]    Compiling serde_derive v1.0.87
[INFO] [stderr]     Checking wayland-protocols v0.21.11
[INFO] [stderr]     Checking tiff v0.2.2
[INFO] [stderr]     Checking image v0.21.0
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.4
[INFO] [stderr]     Checking pistoncore-input v0.23.0
[INFO] [stderr]     Checking winit v0.18.1
[INFO] [stderr]     Checking piston2d-opengl_graphics v0.59.0
[INFO] [stderr]     Checking pistoncore-window v0.35.0
[INFO] [stderr]     Checking pistoncore-event_loop v0.40.0
[INFO] [stderr]     Checking piston v0.40.0
[INFO] [stderr]     Checking pistoncore-glutin_window v0.52.0
[INFO] [stderr]     Checking minesweeper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `temp_val`
[INFO] [stderr]   --> src/minesweeper.rs:81:13
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let temp_val: i32 = index as i32;
[INFO] [stderr]    |             ^^^^^^^^ help: consider prefixing with an underscore: `_temp_val`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pos`
[INFO] [stderr]   --> src/minesweeper_controller.rs:27:46
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn event<E: GenericEvent>(&mut self, pos: [f64; 2], size: f64, e: &E) {
[INFO] [stderr]    |                                              ^^^ help: consider prefixing with an underscore: `_pos`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `size`
[INFO] [stderr]   --> src/minesweeper_controller.rs:27:61
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn event<E: GenericEvent>(&mut self, pos: [f64; 2], size: f64, e: &E) {
[INFO] [stderr]    |                                                             ^^^^ help: consider prefixing with an underscore: `_size`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/minesweeper_controller.rs:27:72
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn event<E: GenericEvent>(&mut self, pos: [f64; 2], size: f64, e: &E) {
[INFO] [stderr]    |                                                                        ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |     let mut minesweeper_controller = MinesweeperController::new(minesweeper);
[INFO] [stderr]    |         ----^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Intermediate`
[INFO] [stderr]   --> src/minesweeper.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Intermediate,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Expert`
[INFO] [stderr]   --> src/minesweeper.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     Expert,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `init`
[INFO] [stderr]   --> src/minesweeper.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     pub fn init(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Open`
[INFO] [stderr]   --> src/minesweeper.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     Open(u8),
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/minesweeper.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     pub fn new() -> Cell {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `toggle`
[INFO] [stderr]    --> src/minesweeper.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 |     pub fn toggle(&mut self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `event`
[INFO] [stderr]   --> src/minesweeper_controller.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn event<E: GenericEvent>(&mut self, pos: [f64; 2], size: f64, e: &E) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `temp_val`
[INFO] [stderr]   --> src/minesweeper.rs:81:13
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let temp_val: i32 = index as i32;
[INFO] [stderr]    |             ^^^^^^^^ help: consider prefixing with an underscore: `_temp_val`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pos`
[INFO] [stderr]   --> src/minesweeper_controller.rs:27:46
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn event<E: GenericEvent>(&mut self, pos: [f64; 2], size: f64, e: &E) {
[INFO] [stderr]    |                                              ^^^ help: consider prefixing with an underscore: `_pos`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `size`
[INFO] [stderr]   --> src/minesweeper_controller.rs:27:61
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn event<E: GenericEvent>(&mut self, pos: [f64; 2], size: f64, e: &E) {
[INFO] [stderr]    |                                                             ^^^^ help: consider prefixing with an underscore: `_size`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/minesweeper_controller.rs:27:72
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn event<E: GenericEvent>(&mut self, pos: [f64; 2], size: f64, e: &E) {
[INFO] [stderr]    |                                                                        ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |     let mut minesweeper_controller = MinesweeperController::new(minesweeper);
[INFO] [stderr]    |         ----^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Intermediate`
[INFO] [stderr]   --> src/minesweeper.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Intermediate,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Expert`
[INFO] [stderr]   --> src/minesweeper.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     Expert,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `init`
[INFO] [stderr]   --> src/minesweeper.rs:64:5
[INFO] [stderr]    |
[INFO] [stderr] 64 |     pub fn init(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Open`
[INFO] [stderr]   --> src/minesweeper.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     Open(u8),
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/minesweeper.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     pub fn new() -> Cell {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `toggle`
[INFO] [stderr]    --> src/minesweeper.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 |     pub fn toggle(&mut self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `event`
[INFO] [stderr]   --> src/minesweeper_controller.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn event<E: GenericEvent>(&mut self, pos: [f64; 2], size: f64, e: &E) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 36s
[INFO] running `"docker" "inspect" "ac6307ed15eb61e9205844ce657dccd3a66f4eca0c0f09372bee55e15b61239d"`
[INFO] running `"docker" "rm" "-f" "ac6307ed15eb61e9205844ce657dccd3a66f4eca0c0f09372bee55e15b61239d"`
[INFO] [stdout] ac6307ed15eb61e9205844ce657dccd3a66f4eca0c0f09372bee55e15b61239d