[INFO] cloning repository https://github.com/AlecGoncharow/eight_queens
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AlecGoncharow/eight_queens" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlecGoncharow%2Feight_queens", kill_on_drop: false }`
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[INFO] [stdout] 72013de890dd8ab2bdc783e3a60bd444b7c66193
[INFO] testing AlecGoncharow/eight_queens against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlecGoncharow%2Feight_queens" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
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[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AlecGoncharow/eight_queens
[INFO] finished tweaking git repo https://github.com/AlecGoncharow/eight_queens
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[INFO] [stderr]    Compiling ggez v0.5.0-rc.2
[INFO] [stderr]    Compiling eight_queens v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rand::prelude::*`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ContextBuilder`
[INFO] [stdout]  --> src/board.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ggez::{Context, ContextBuilder, GameResult, graphics};
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `size` and `conflicts` are never read
[INFO] [stdout]   --> src/board.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Board {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 22 |     pub size: usize,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 23 |     pub blocks: Blocks,
[INFO] [stdout] 24 |     pub conflicts: i32,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_from_queens` and `initialize_queens` are never used
[INFO] [stdout]   --> src/board.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 65 | impl Board {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 74 |     pub fn new_from_queens(queens: Vec<usize>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 82 |     pub fn initialize_queens(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_from_queens` and `initialize_queens` are never used
[INFO] [stdout]    --> src/board.rs:108:12
[INFO] [stdout]     |
[INFO] [stdout] 101 | impl Blocks {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 108 |     pub fn new_from_queens(queens: Vec<usize>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     pub fn initialize_queens(&mut self, size: usize) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `state` and `attacked` are never read
[INFO] [stdout]    --> src/board.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 154 | pub struct Block {
[INFO] [stdout]     |            ----- fields in this struct
[INFO] [stdout] 155 |     pub state: BlockState,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 156 |     pub attacked: bool,
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Block` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `queen` is never used
[INFO] [stdout]    --> src/board.rs:162:12
[INFO] [stdout]     |
[INFO] [stdout] 161 | impl Block {
[INFO] [stdout]     | ---------- associated function in this implementation
[INFO] [stdout] 162 |     pub fn queen() -> Self {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Queen` is never constructed
[INFO] [stdout]    --> src/board.rs:205:5
[INFO] [stdout]     |
[INFO] [stdout] 203 | pub enum BlockState {
[INFO] [stdout]     |          ---------- variant in this enum
[INFO] [stdout] 204 |     Empty,
[INFO] [stdout] 205 |     Queen,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `BlockState` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         self.board.draw(ctx);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let _ = self.board.draw(ctx);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6m 39s
[INFO] running `Command { std: "docker" "inspect" "f9e82868ac760d4621f575dc4936dbd5d0ed4446e328801f44dcca69442ee32f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9e82868ac760d4621f575dc4936dbd5d0ed4446e328801f44dcca69442ee32f", kill_on_drop: false }`
[INFO] [stdout] f9e82868ac760d4621f575dc4936dbd5d0ed4446e328801f44dcca69442ee32f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd7ae3d3e8c464b9df2bacc519c2b2e9f5195310b9265d84160612565604fa55
[INFO] running `Command { std: "docker" "start" "-a" "dd7ae3d3e8c464b9df2bacc519c2b2e9f5195310b9265d84160612565604fa55", kill_on_drop: false }`
[INFO] [stderr]    Compiling eight_queens v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rand::prelude::*`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ContextBuilder`
[INFO] [stdout]  --> src/board.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ggez::{Context, ContextBuilder, GameResult, graphics};
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `size` and `conflicts` are never read
[INFO] [stdout]   --> src/board.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Board {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 22 |     pub size: usize,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 23 |     pub blocks: Blocks,
[INFO] [stdout] 24 |     pub conflicts: i32,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_from_queens` and `initialize_queens` are never used
[INFO] [stdout]   --> src/board.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 65 | impl Board {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 74 |     pub fn new_from_queens(queens: Vec<usize>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 82 |     pub fn initialize_queens(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_from_queens` and `initialize_queens` are never used
[INFO] [stdout]    --> src/board.rs:108:12
[INFO] [stdout]     |
[INFO] [stdout] 101 | impl Blocks {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 108 |     pub fn new_from_queens(queens: Vec<usize>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     pub fn initialize_queens(&mut self, size: usize) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `state` and `attacked` are never read
[INFO] [stdout]    --> src/board.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 154 | pub struct Block {
[INFO] [stdout]     |            ----- fields in this struct
[INFO] [stdout] 155 |     pub state: BlockState,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 156 |     pub attacked: bool,
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Block` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `queen` is never used
[INFO] [stdout]    --> src/board.rs:162:12
[INFO] [stdout]     |
[INFO] [stdout] 161 | impl Block {
[INFO] [stdout]     | ---------- associated function in this implementation
[INFO] [stdout] 162 |     pub fn queen() -> Self {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Queen` is never constructed
[INFO] [stdout]    --> src/board.rs:205:5
[INFO] [stdout]     |
[INFO] [stdout] 203 | pub enum BlockState {
[INFO] [stdout]     |          ---------- variant in this enum
[INFO] [stdout] 204 |     Empty,
[INFO] [stdout] 205 |     Queen,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `BlockState` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         self.board.draw(ctx);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let _ = self.board.draw(ctx);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "dd7ae3d3e8c464b9df2bacc519c2b2e9f5195310b9265d84160612565604fa55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd7ae3d3e8c464b9df2bacc519c2b2e9f5195310b9265d84160612565604fa55", kill_on_drop: false }`
[INFO] [stdout] dd7ae3d3e8c464b9df2bacc519c2b2e9f5195310b9265d84160612565604fa55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 72f743caf500ca8a51d54fe0630759e807e85d3b78a6e2a34bd80aeac03fa198
[INFO] running `Command { std: "docker" "start" "-a" "72f743caf500ca8a51d54fe0630759e807e85d3b78a6e2a34bd80aeac03fa198", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `rand::prelude::*`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use rand::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ContextBuilder`
[INFO] [stderr]  --> src/board.rs:1:21
[INFO] [stderr]   |
[INFO] [stderr] 1 | use ggez::{Context, ContextBuilder, GameResult, graphics};
[INFO] [stderr]   |                     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `size` and `conflicts` are never read
[INFO] [stderr]   --> src/board.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub struct Board {
[INFO] [stderr]    |            ----- fields in this struct
[INFO] [stderr] 22 |     pub size: usize,
[INFO] [stderr]    |         ^^^^
[INFO] [stderr] 23 |     pub blocks: Blocks,
[INFO] [stderr] 24 |     pub conflicts: i32,
[INFO] [stderr]    |         ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new_from_queens` and `initialize_queens` are never used
[INFO] [stderr]   --> src/board.rs:74:12
[INFO] [stderr]    |
[INFO] [stderr] 65 | impl Board {
[INFO] [stderr]    | ---------- associated items in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 74 |     pub fn new_from_queens(queens: Vec<usize>) -> Self {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 82 |     pub fn initialize_queens(&mut self) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new_from_queens` and `initialize_queens` are never used
[INFO] [stderr]    --> src/board.rs:108:12
[INFO] [stderr]     |
[INFO] [stderr] 101 | impl Blocks {
[INFO] [stderr]     | ----------- associated items in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 108 |     pub fn new_from_queens(queens: Vec<usize>) -> Self {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 120 |     pub fn initialize_queens(&mut self, size: usize) {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `state` and `attacked` are never read
[INFO] [stderr]    --> src/board.rs:155:9
[INFO] [stderr]     |
[INFO] [stderr] 154 | pub struct Block {
[INFO] [stderr]     |            ----- fields in this struct
[INFO] [stderr] 155 |     pub state: BlockState,
[INFO] [stderr]     |         ^^^^^
[INFO] [stderr] 156 |     pub attacked: bool,
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Block` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `queen` is never used
[INFO] [stderr]    --> src/board.rs:162:12
[INFO] [stderr]     |
[INFO] [stderr] 161 | impl Block {
[INFO] [stderr]     | ---------- associated function in this implementation
[INFO] [stderr] 162 |     pub fn queen() -> Self {
[INFO] [stderr]     |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Queen` is never constructed
[INFO] [stderr]    --> src/board.rs:205:5
[INFO] [stderr]     |
[INFO] [stderr] 203 | pub enum BlockState {
[INFO] [stderr]     |          ---------- variant in this enum
[INFO] [stderr] 204 |     Empty,
[INFO] [stderr] 205 |     Queen,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `BlockState` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |         self.board.draw(ctx);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 28 |         let _ = self.board.draw(ctx);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `eight_queens` (bin "eight_queens" test) generated 9 warnings (run `cargo fix --bin "eight_queens" --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/eight_queens-c69204be67d509c7)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "72f743caf500ca8a51d54fe0630759e807e85d3b78a6e2a34bd80aeac03fa198", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72f743caf500ca8a51d54fe0630759e807e85d3b78a6e2a34bd80aeac03fa198", kill_on_drop: false }`
[INFO] [stdout] 72f743caf500ca8a51d54fe0630759e807e85d3b78a6e2a34bd80aeac03fa198
