[INFO] cloning repository https://github.com/ede1998/sweepers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ede1998/sweepers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fede1998%2Fsweepers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fede1998%2Fsweepers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3b1ec545d1e80a41f44ef3d9efd61693df613171
[INFO] checking ede1998/sweepers against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fede1998%2Fsweepers" "/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/ede1998/sweepers on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ede1998/sweepers
[INFO] finished tweaking git repo https://github.com/ede1998/sweepers
[INFO] tweaked toml for git repo https://github.com/ede1998/sweepers written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/ede1998/sweepers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded custom_debug_derive v0.5.0
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "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] f9fa224285cfdfd7551ea594bf716e04d0fea9b39476ebae063b608093755f27
[INFO] running `Command { std: "docker" "start" "-a" "f9fa224285cfdfd7551ea594bf716e04d0fea9b39476ebae063b608093755f27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f9fa224285cfdfd7551ea594bf716e04d0fea9b39476ebae063b608093755f27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9fa224285cfdfd7551ea594bf716e04d0fea9b39476ebae063b608093755f27", kill_on_drop: false }`
[INFO] [stdout] f9fa224285cfdfd7551ea594bf716e04d0fea9b39476ebae063b608093755f27
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 0fc03be158effe9f6906919e4db6ccf7f98ac7b68e1025b1d7d78e63c83a54d7
[INFO] running `Command { std: "docker" "start" "-a" "0fc03be158effe9f6906919e4db6ccf7f98ac7b68e1025b1d7d78e63c83a54d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling custom_debug_derive v0.5.0
[INFO] [stderr]     Checking sweepers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `with_area`
[INFO] [stdout]   --> src/core/area.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn with_area(width: usize, height: usize, area: Vec<T>) -> Self {
[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: `loc_iter`
[INFO] [stdout]   --> src/core/area.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn loc_iter(&self) -> impl Iterator<Item = (Location, &T)> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Mark`
[INFO] [stdout]   --> src/core/command.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     Mark,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Unmark`
[INFO] [stdout]   --> src/core/command.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Unmark,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_win`
[INFO] [stdout]   --> src/core/game_state.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn is_win(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `try_mv`
[INFO] [stdout]    --> src/core/location.rs:190:12
[INFO] [stdout]     |
[INFO] [stdout] 190 |     pub fn try_mv(self, d: Direction) -> Self {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_mut_revealed`
[INFO] [stdout]   --> src/core/mine_field.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn as_mut_revealed(&mut self) -> Option<&mut usize> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_revealed`
[INFO] [stdout]   --> src/core/mine_field.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn as_revealed(&self) -> Option<&usize> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `with_generator`
[INFO] [stdout]    --> src/core/mine_field.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 137 |     pub fn with_generator(params: Parameters, generator: Box<dyn MinefieldGenerator>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_active_game`
[INFO] [stdout]    --> src/core/mine_field.rs:156:12
[INFO] [stdout]     |
[INFO] [stdout] 156 |     pub fn new_active_game(grid: &str) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unreveal`
[INFO] [stdout]    --> src/core/mine_field.rs:289:12
[INFO] [stdout]     |
[INFO] [stdout] 289 |     pub fn unreveal(&mut self, location: Location) -> Option<State> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `draw_single`
[INFO] [stdout]    --> src/frontend/terminal.rs:264:12
[INFO] [stdout]     |
[INFO] [stdout] 264 |     pub fn draw_single(&mut self, location: Location, state: &State) {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `derive_count`
[INFO] [stdout]    --> src/solver.rs:211:8
[INFO] [stdout]     |
[INFO] [stdout] 211 |     fn derive_count(&self, count: usize, produced_by: &dyn Rule) -> Self {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `seed`
[INFO] [stdout]    --> src/solver.rs:254:8
[INFO] [stdout]     |
[INFO] [stdout] 254 |     fn seed(mf: &Minefield) -> Self {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add`
[INFO] [stdout]    --> src/solver.rs:275:8
[INFO] [stdout]     |
[INFO] [stdout] 275 |     fn add<I: IntoIterator<Item = Fact>>(&mut self, container: I) -> bool {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `guaranteed_safe_locations`
[INFO] [stdout]    --> src/solver.rs:281:8
[INFO] [stdout]     |
[INFO] [stdout] 281 |     fn guaranteed_safe_locations(&self) -> HashSet<Location> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `guaranteed_mines`
[INFO] [stdout]    --> src/solver.rs:289:8
[INFO] [stdout]     |
[INFO] [stdout] 289 |     fn guaranteed_mines(&self) -> HashSet<Location> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `solve`
[INFO] [stdout]    --> src/solver.rs:297:8
[INFO] [stdout]     |
[INFO] [stdout] 297 |     fn solve(mf: &Minefield) -> (HashSet<Location>, HashSet<Location>) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Mark`
[INFO] [stdout]   --> src/core/command.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     Mark,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Unmark`
[INFO] [stdout]   --> src/core/command.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Unmark,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_win`
[INFO] [stdout]   --> src/core/game_state.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn is_win(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `try_mv`
[INFO] [stdout]    --> src/core/location.rs:190:12
[INFO] [stdout]     |
[INFO] [stdout] 190 |     pub fn try_mv(self, d: Direction) -> Self {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_mut_revealed`
[INFO] [stdout]   --> src/core/mine_field.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn as_mut_revealed(&mut self) -> Option<&mut usize> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `with_generator`
[INFO] [stdout]    --> src/core/mine_field.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 137 |     pub fn with_generator(params: Parameters, generator: Box<dyn MinefieldGenerator>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unreveal`
[INFO] [stdout]    --> src/core/mine_field.rs:289:12
[INFO] [stdout]     |
[INFO] [stdout] 289 |     pub fn unreveal(&mut self, location: Location) -> Option<State> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `draw_single`
[INFO] [stdout]    --> src/frontend/terminal.rs:264:12
[INFO] [stdout]     |
[INFO] [stdout] 264 |     pub fn draw_single(&mut self, location: Location, state: &State) {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `derive_count`
[INFO] [stdout]    --> src/solver.rs:211:8
[INFO] [stdout]     |
[INFO] [stdout] 211 |     fn derive_count(&self, count: usize, produced_by: &dyn Rule) -> Self {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.22s
[INFO] running `Command { std: "docker" "inspect" "0fc03be158effe9f6906919e4db6ccf7f98ac7b68e1025b1d7d78e63c83a54d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fc03be158effe9f6906919e4db6ccf7f98ac7b68e1025b1d7d78e63c83a54d7", kill_on_drop: false }`
[INFO] [stdout] 0fc03be158effe9f6906919e4db6ccf7f98ac7b68e1025b1d7d78e63c83a54d7