[INFO] cloning repository AlecGoncharow/eight_queens
[INFO] running `"git" "clone" "--bare" "git://github.com/AlecGoncharow/eight_queens.git" "work/cache/sources/gh/AlecGoncharow/eight_queens"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/AlecGoncharow/eight_queens'...
[INFO] running `"git" "clone" "work/cache/sources/gh/AlecGoncharow/eight_queens" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/AlecGoncharow/eight_queens"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/AlecGoncharow/eight_queens'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/AlecGoncharow/eight_queens" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/AlecGoncharow/eight_queens"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/AlecGoncharow/eight_queens'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 72013de890dd8ab2bdc783e3a60bd444b7c66193
[INFO] sha for GitHub repo AlecGoncharow/eight_queens: 72013de890dd8ab2bdc783e3a60bd444b7c66193
[INFO] validating manifest of AlecGoncharow/eight_queens on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of AlecGoncharow/eight_queens on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing AlecGoncharow/eight_queens
[INFO] finished frobbing AlecGoncharow/eight_queens
[INFO] frobbed toml for AlecGoncharow/eight_queens written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/AlecGoncharow/eight_queens/Cargo.toml
[INFO] started frobbing AlecGoncharow/eight_queens
[INFO] finished frobbing AlecGoncharow/eight_queens
[INFO] frobbed toml for AlecGoncharow/eight_queens written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/AlecGoncharow/eight_queens/Cargo.toml
[INFO] crate AlecGoncharow/eight_queens already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking AlecGoncharow/eight_queens against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-2/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/AlecGoncharow/eight_queens:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6574fb8da46a84db2e50028ff1ca45ca0be0d566b38716dcb467be5977e16553
[INFO] running `"docker" "start" "-a" "6574fb8da46a84db2e50028ff1ca45ca0be0d566b38716dcb467be5977e16553"`
[INFO] [stderr]     Checking nix v0.11.0
[INFO] [stderr]     Checking gfx_core v0.9.1
[INFO] [stderr]     Checking andrew v0.2.1
[INFO] [stderr]     Checking image v0.21.2
[INFO] [stderr]    Compiling skeptic v0.13.4
[INFO] [stderr]     Checking wayland-protocols v0.21.12
[INFO] [stderr]    Compiling ggez v0.5.0-rc.2
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.5
[INFO] [stderr]     Checking gilrs-core v0.2.2
[INFO] [stderr]     Checking gilrs v0.7.1
[INFO] [stderr]     Checking winit v0.19.1
[INFO] [stderr]     Checking glutin v0.20.0
[INFO] [stderr]     Checking gfx_device_gl v0.16.1
[INFO] [stderr]     Checking gfx v0.18.1
[INFO] [stderr]     Checking gfx_window_glutin v0.30.0
[INFO] [stderr]     Checking eight_queens v0.1.0 (/opt/crater/workdir)
[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: 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: method is never used: `new_from_queens`
[INFO] [stderr]   --> src/board.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     pub fn new_from_queens(queens: Vec<usize>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `initialize_queens`
[INFO] [stderr]   --> src/board.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     pub fn initialize_queens(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_from_queens`
[INFO] [stderr]    --> src/board.rs:108:5
[INFO] [stderr]     |
[INFO] [stderr] 108 |     pub fn new_from_queens(queens: Vec<usize>) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `initialize_queens`
[INFO] [stderr]    --> src/board.rs:120:5
[INFO] [stderr]     |
[INFO] [stderr] 120 |     pub fn initialize_queens(&mut self, size: usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `queen`
[INFO] [stderr]    --> src/board.rs:162:5
[INFO] [stderr]     |
[INFO] [stderr] 162 |     pub fn queen() -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Queen`
[INFO] [stderr]    --> src/board.rs:205:5
[INFO] [stderr]     |
[INFO] [stderr] 205 |     Queen,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::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: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_from_queens`
[INFO] [stderr]   --> src/board.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     pub fn new_from_queens(queens: Vec<usize>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `initialize_queens`
[INFO] [stderr]   --> src/board.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     pub fn initialize_queens(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_from_queens`
[INFO] [stderr]    --> src/board.rs:108:5
[INFO] [stderr]     |
[INFO] [stderr] 108 |     pub fn new_from_queens(queens: Vec<usize>) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `initialize_queens`
[INFO] [stderr]    --> src/board.rs:120:5
[INFO] [stderr]     |
[INFO] [stderr] 120 |     pub fn initialize_queens(&mut self, size: usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `queen`
[INFO] [stderr]    --> src/board.rs:162:5
[INFO] [stderr]     |
[INFO] [stderr] 162 |     pub fn queen() -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Queen`
[INFO] [stderr]    --> src/board.rs:205:5
[INFO] [stderr]     |
[INFO] [stderr] 205 |     Queen,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::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: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 28s
[INFO] running `"docker" "inspect" "6574fb8da46a84db2e50028ff1ca45ca0be0d566b38716dcb467be5977e16553"`
[INFO] running `"docker" "rm" "-f" "6574fb8da46a84db2e50028ff1ca45ca0be0d566b38716dcb467be5977e16553"`
[INFO] [stdout] 6574fb8da46a84db2e50028ff1ca45ca0be0d566b38716dcb467be5977e16553