[INFO] updating cached repository AlecGoncharow/eight_queens
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/AlecGoncharow/eight_queens
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/AlecGoncharow/eight_queens" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/AlecGoncharow/eight_queens"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/AlecGoncharow/eight_queens'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/AlecGoncharow/eight_queens" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/AlecGoncharow/eight_queens"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of AlecGoncharow/eight_queens on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-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-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/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-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking AlecGoncharow/eight_queens against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-5/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0bd482ae834fe0194e7ac1511d8e5270e4475101c049917046f29179340b4567
[INFO] running `"docker" "start" "-a" "0bd482ae834fe0194e7ac1511d8e5270e4475101c049917046f29179340b4567"`
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]     Checking toml v0.5.1
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]     Checking nix v0.11.0
[INFO] [stderr]     Checking bzip2-sys v0.1.7
[INFO] [stderr]     Checking directories v1.0.2
[INFO] [stderr]    Compiling gl_generator v0.11.0
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]    Compiling euclid_macros v0.1.0
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling smart-default v0.5.2
[INFO] [stderr]     Checking rusttype v0.7.6
[INFO] [stderr]     Checking num-rational v0.2.1
[INFO] [stderr]     Checking alga v0.9.1
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]     Checking twox-hash v1.3.0
[INFO] [stderr]     Checking gfx_core v0.9.1
[INFO] [stderr]     Checking zip v0.5.2
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]     Checking png v0.14.1
[INFO] [stderr]     Checking andrew v0.2.1
[INFO] [stderr]     Checking glyph_brush_layout v0.1.6
[INFO] [stderr]     Checking rodio v0.8.1
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.3
[INFO] [stderr]    Compiling gfx_gl v0.6.0
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.5
[INFO] [stderr]     Checking euclid v0.19.8
[INFO] [stderr]     Checking gilrs-core v0.2.2
[INFO] [stderr]     Checking glyph_brush v0.4.3
[INFO] [stderr]     Checking tiff v0.2.2
[INFO] [stderr]     Checking nalgebra v0.18.0
[INFO] [stderr]     Checking gilrs v0.7.1
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.5
[INFO] [stderr]     Checking lyon_geom v0.12.6
[INFO] [stderr]     Checking image v0.21.2
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling serde_json v1.0.39
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking lyon_path v0.13.1
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling cargo_metadata v0.6.4
[INFO] [stderr]     Checking lyon_tessellation v0.13.1
[INFO] [stderr]     Checking lyon_algorithms v0.13.1
[INFO] [stderr]    Compiling skeptic v0.13.4
[INFO] [stderr]     Checking lyon v0.13.1
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking winit v0.19.1
[INFO] [stderr]    Compiling ggez v0.5.0-rc.2
[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: 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: 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]     Finished dev [unoptimized + debuginfo] target(s) in 2m 29s
[INFO] running `"docker" "inspect" "0bd482ae834fe0194e7ac1511d8e5270e4475101c049917046f29179340b4567"`
[INFO] running `"docker" "rm" "-f" "0bd482ae834fe0194e7ac1511d8e5270e4475101c049917046f29179340b4567"`
[INFO] [stdout] 0bd482ae834fe0194e7ac1511d8e5270e4475101c049917046f29179340b4567