[INFO] cloning repository bwhetherington/rust-2048
[INFO] running `"git" "clone" "--bare" "git://github.com/bwhetherington/rust-2048.git" "work/cache/sources/gh/bwhetherington/rust-2048"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/bwhetherington/rust-2048'...
[INFO] running `"git" "clone" "work/cache/sources/gh/bwhetherington/rust-2048" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/bwhetherington/rust-2048"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/bwhetherington/rust-2048'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bwhetherington/rust-2048" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/bwhetherington/rust-2048"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/bwhetherington/rust-2048'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c80aad95941ca1f8797613d73ab44044c3178f40
[INFO] sha for GitHub repo bwhetherington/rust-2048: c80aad95941ca1f8797613d73ab44044c3178f40
[INFO] validating manifest of bwhetherington/rust-2048 on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of bwhetherington/rust-2048 on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing bwhetherington/rust-2048
[INFO] finished frobbing bwhetherington/rust-2048
[INFO] frobbed toml for bwhetherington/rust-2048 written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/bwhetherington/rust-2048/Cargo.toml
[INFO] started frobbing bwhetherington/rust-2048
[INFO] finished frobbing bwhetherington/rust-2048
[INFO] frobbed toml for bwhetherington/rust-2048 written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/bwhetherington/rust-2048/Cargo.toml
[INFO] crate bwhetherington/rust-2048 has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking bwhetherington/rust-2048 against master#c0086b9e8972fef9fd4af24bae20d45021ed06c6 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-0/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/bwhetherington/rust-2048:/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" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 368598ab2b06d716e43c660a72d58e2e40fbcdcdc9c9aa978225e0b4fef130e0
[INFO] running `"docker" "start" "-a" "368598ab2b06d716e43c660a72d58e2e40fbcdcdc9c9aa978225e0b4fef130e0"`
[INFO] [stderr]     Checking rust-2048-2 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `game::*`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use game::*;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]   --> src/main.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let d: Matrix<_> = m.diag().into();
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_d`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `j`
[INFO] [stderr]   --> src/game/mod.rs:74:13
[INFO] [stderr]    |
[INFO] [stderr] 74 |         for j in 0..source.cols() {
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_j`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dest`
[INFO] [stderr]   --> src/game/mod.rs:70:37
[INFO] [stderr]    |
[INFO] [stderr] 70 | fn slide_left(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |                                     ^^^^ help: consider prefixing with an underscore: `_dest`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source`
[INFO] [stderr]   --> src/game/mod.rs:82:16
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn slide_right(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |                ^^^^^^ help: consider prefixing with an underscore: `_source`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dest`
[INFO] [stderr]   --> src/game/mod.rs:82:38
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn slide_right(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |                                      ^^^^ help: consider prefixing with an underscore: `_dest`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source`
[INFO] [stderr]   --> src/game/mod.rs:88:13
[INFO] [stderr]    |
[INFO] [stderr] 88 | fn slide_up(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |             ^^^^^^ help: consider prefixing with an underscore: `_source`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dest`
[INFO] [stderr]   --> src/game/mod.rs:88:35
[INFO] [stderr]    |
[INFO] [stderr] 88 | fn slide_up(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |                                   ^^^^ help: consider prefixing with an underscore: `_dest`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source`
[INFO] [stderr]   --> src/game/mod.rs:94:15
[INFO] [stderr]    |
[INFO] [stderr] 94 | fn slide_down(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |               ^^^^^^ help: consider prefixing with an underscore: `_source`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dest`
[INFO] [stderr]   --> src/game/mod.rs:94:37
[INFO] [stderr]    |
[INFO] [stderr] 94 | fn slide_down(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |                                     ^^^^ help: consider prefixing with an underscore: `_dest`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `game::*`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use game::*;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]   --> src/main.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let d: Matrix<_> = m.diag().into();
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_d`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `j`
[INFO] [stderr]   --> src/game/mod.rs:74:13
[INFO] [stderr]    |
[INFO] [stderr] 74 |         for j in 0..source.cols() {
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_j`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dest`
[INFO] [stderr]   --> src/game/mod.rs:70:37
[INFO] [stderr]    |
[INFO] [stderr] 70 | fn slide_left(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |                                     ^^^^ help: consider prefixing with an underscore: `_dest`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source`
[INFO] [stderr]   --> src/game/mod.rs:82:16
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn slide_right(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |                ^^^^^^ help: consider prefixing with an underscore: `_source`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dest`
[INFO] [stderr]   --> src/game/mod.rs:82:38
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn slide_right(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |                                      ^^^^ help: consider prefixing with an underscore: `_dest`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source`
[INFO] [stderr]   --> src/game/mod.rs:88:13
[INFO] [stderr]    |
[INFO] [stderr] 88 | fn slide_up(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |             ^^^^^^ help: consider prefixing with an underscore: `_source`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dest`
[INFO] [stderr]   --> src/game/mod.rs:88:35
[INFO] [stderr]    |
[INFO] [stderr] 88 | fn slide_up(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |                                   ^^^^ help: consider prefixing with an underscore: `_dest`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source`
[INFO] [stderr]   --> src/game/mod.rs:94:15
[INFO] [stderr]    |
[INFO] [stderr] 94 | fn slide_down(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |               ^^^^^^ help: consider prefixing with an underscore: `_source`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dest`
[INFO] [stderr]   --> src/game/mod.rs:94:37
[INFO] [stderr]    |
[INFO] [stderr] 94 | fn slide_down(source: &Matrix<u32>, dest: &mut Matrix<u32>) {
[INFO] [stderr]    |                                     ^^^^ help: consider prefixing with an underscore: `_dest`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `"docker" "inspect" "368598ab2b06d716e43c660a72d58e2e40fbcdcdc9c9aa978225e0b4fef130e0"`
[INFO] running `"docker" "rm" "-f" "368598ab2b06d716e43c660a72d58e2e40fbcdcdc9c9aa978225e0b4fef130e0"`
[INFO] [stdout] 368598ab2b06d716e43c660a72d58e2e40fbcdcdc9c9aa978225e0b4fef130e0