[INFO] updating cached repository bwhetherington/rust-2048
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/bwhetherington/rust-2048
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/bwhetherington/rust-2048" "work/ex/beta-1.37-6/sources/1.36.0/gh/bwhetherington/rust-2048"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/bwhetherington/rust-2048'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bwhetherington/rust-2048" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/bwhetherington/rust-2048"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of bwhetherington/rust-2048 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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/beta-1.37-6/sources/1.36.0/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/beta-1.37-6/sources/beta-2019-07-23/gh/bwhetherington/rust-2048/Cargo.toml
[INFO] crate bwhetherington/rust-2048 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing bwhetherington/rust-2048 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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=warn" "-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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] c660ee1045d6be019d44d21fba13b117580539fe94fe127ac5a18e415c6e0178
[INFO] running `"docker" "start" "-a" "c660ee1045d6be019d44d21fba13b117580539fe94fe127ac5a18e415c6e0178"`
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 1.44s
[INFO] running `"docker" "inspect" "c660ee1045d6be019d44d21fba13b117580539fe94fe127ac5a18e415c6e0178"`
[INFO] running `"docker" "rm" "-f" "c660ee1045d6be019d44d21fba13b117580539fe94fe127ac5a18e415c6e0178"`
[INFO] [stdout] c660ee1045d6be019d44d21fba13b117580539fe94fe127ac5a18e415c6e0178
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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=warn" "-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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] f987ce47f65aea1028f4c3575fa4542da575fa11799a3b28946e244afb693863
[INFO] running `"docker" "start" "-a" "f987ce47f65aea1028f4c3575fa4542da575fa11799a3b28946e244afb693863"`
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `"docker" "inspect" "f987ce47f65aea1028f4c3575fa4542da575fa11799a3b28946e244afb693863"`
[INFO] running `"docker" "rm" "-f" "f987ce47f65aea1028f4c3575fa4542da575fa11799a3b28946e244afb693863"`
[INFO] [stdout] f987ce47f65aea1028f4c3575fa4542da575fa11799a3b28946e244afb693863
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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=warn" "-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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 417879c751552e23d4b35f3421ee73822c82be7f57cf6699b5cbf84255aec87c
[INFO] running `"docker" "start" "-a" "417879c751552e23d4b35f3421ee73822c82be7f57cf6699b5cbf84255aec87c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_2048_2-0a0a57755b6221d4
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "417879c751552e23d4b35f3421ee73822c82be7f57cf6699b5cbf84255aec87c"`
[INFO] running `"docker" "rm" "-f" "417879c751552e23d4b35f3421ee73822c82be7f57cf6699b5cbf84255aec87c"`
[INFO] [stdout] 417879c751552e23d4b35f3421ee73822c82be7f57cf6699b5cbf84255aec87c