[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] 2aeb602c88cce8e4499bb30a01654bea908c7b71
[INFO] checking ede1998/sweepers against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fede1998%2Fsweepers" "/workspace/builds/worker-52/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-52/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ede1998/sweepers on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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-52/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 95e0d6f1dfd634ac905a978ab96bd9d40af830100be786d56818c1ea72c6d521
[INFO] running `Command { std: "docker" "start" "-a" "95e0d6f1dfd634ac905a978ab96bd9d40af830100be786d56818c1ea72c6d521", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95e0d6f1dfd634ac905a978ab96bd9d40af830100be786d56818c1ea72c6d521", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95e0d6f1dfd634ac905a978ab96bd9d40af830100be786d56818c1ea72c6d521", kill_on_drop: false }`
[INFO] [stdout] 95e0d6f1dfd634ac905a978ab96bd9d40af830100be786d56818c1ea72c6d521
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-52/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1a9bba19cba69969f40de20e81fd52865b174878db46b4082b8af26aebcb7305
[INFO] running `Command { std: "docker" "start" "-a" "1a9bba19cba69969f40de20e81fd52865b174878db46b4082b8af26aebcb7305", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking termion v1.5.6
[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: `contains`
[INFO] [stdout]   --> src/core/area.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn contains(&self, l: Location) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `loc_iter`
[INFO] [stdout]   --> src/core/area.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     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 constant is never used: `INVALID`
[INFO] [stdout]    --> src/core/location.rs:114:5
[INFO] [stdout]     |
[INFO] [stdout] 114 | /     pub const INVALID: Location = Location {
[INFO] [stdout] 115 | |         x: Bounded::Invalid,
[INFO] [stdout] 116 | |         y: Bounded::Invalid,
[INFO] [stdout] 117 | |     };
[INFO] [stdout]     | |______^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `try_mv`
[INFO] [stdout]    --> src/core/location.rs:195:12
[INFO] [stdout]     |
[INFO] [stdout] 195 |     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: `unobserved_count`
[INFO] [stdout]    --> src/core/mine_field.rs:222:12
[INFO] [stdout]     |
[INFO] [stdout] 222 |     pub fn unobserved_count(&self) -> usize {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unreveal`
[INFO] [stdout]    --> src/core/mine_field.rs:305:12
[INFO] [stdout]     |
[INFO] [stdout] 305 |     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: `base`
[INFO] [stdout]    --> src/solver.rs:199:8
[INFO] [stdout]     |
[INFO] [stdout] 199 |     fn base<O: Into<Option<Location>>>(base_location: O, produced_by: &dyn Rule) -> Self {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `seeded`
[INFO] [stdout]    --> src/solver.rs:291:8
[INFO] [stdout]     |
[INFO] [stdout] 291 |     fn seeded<L>(count: usize, proximity: BTreeSet<Location>, base_location: L) -> Self
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize`
[INFO] [stdout]    --> src/solver.rs:336:8
[INFO] [stdout]     |
[INFO] [stdout] 336 |     fn serialize(&self) -> String {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `mine_field`
[INFO] [stdout]    --> src/solver.rs:375:5
[INFO] [stdout]     |
[INFO] [stdout] 375 |     mine_field: &'mf Minefield,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/solver.rs:379:8
[INFO] [stdout]     |
[INFO] [stdout] 379 |     fn new(mine_field: &'mf Minefield) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `seed_universal_fact`
[INFO] [stdout]    --> src/solver.rs:388:8
[INFO] [stdout]     |
[INFO] [stdout] 388 |     fn seed_universal_fact(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `seed`
[INFO] [stdout]    --> src/solver.rs:403:8
[INFO] [stdout]     |
[INFO] [stdout] 403 |     fn seed(&mut self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `seed_rules`
[INFO] [stdout]    --> src/solver.rs:418:8
[INFO] [stdout]     |
[INFO] [stdout] 418 |     fn seed_rules(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `iter`
[INFO] [stdout]    --> src/solver.rs:427:8
[INFO] [stdout]     |
[INFO] [stdout] 427 |     fn iter(&self) -> impl Iterator<Item = &Fact> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add`
[INFO] [stdout]    --> src/solver.rs:443:8
[INFO] [stdout]     |
[INFO] [stdout] 443 |     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:449:8
[INFO] [stdout]     |
[INFO] [stdout] 449 |     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:457:8
[INFO] [stdout]     |
[INFO] [stdout] 457 |     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:465:8
[INFO] [stdout]     |
[INFO] [stdout] 465 |     fn solve(mf: &Minefield) -> (HashSet<Location>, HashSet<Location>) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]    --> src/solver.rs:469:8
[INFO] [stdout]     |
[INFO] [stdout] 469 |     fn run(&mut self) {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `solve_dump`
[INFO] [stdout]    --> src/solver.rs:481:8
[INFO] [stdout]     |
[INFO] [stdout] 481 |     fn solve_dump(
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print_fact_stats`
[INFO] [stdout]    --> src/solver.rs:509:8
[INFO] [stdout]     |
[INFO] [stdout] 509 |     fn print_fact_stats(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dump`
[INFO] [stdout]    --> src/solver.rs:528:8
[INFO] [stdout]     |
[INFO] [stdout] 528 |     fn dump(&self, path: &Path) -> std::io::Result<()> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 32 warnings emitted
[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:195:12
[INFO] [stdout]     |
[INFO] [stdout] 195 |     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:305:12
[INFO] [stdout]     |
[INFO] [stdout] 305 |     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: `iter`
[INFO] [stdout]    --> src/solver.rs:427:8
[INFO] [stdout]     |
[INFO] [stdout] 427 |     fn iter(&self) -> impl Iterator<Item = &Fact> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `solve`
[INFO] [stdout]    --> src/solver.rs:465:8
[INFO] [stdout]     |
[INFO] [stdout] 465 |     fn solve(mf: &Minefield) -> (HashSet<Location>, HashSet<Location>) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.31s
[INFO] running `Command { std: "docker" "inspect" "1a9bba19cba69969f40de20e81fd52865b174878db46b4082b8af26aebcb7305", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a9bba19cba69969f40de20e81fd52865b174878db46b4082b8af26aebcb7305", kill_on_drop: false }`
[INFO] [stdout] 1a9bba19cba69969f40de20e81fd52865b174878db46b4082b8af26aebcb7305