[INFO] updating cached repository https://github.com/pierrechevalier83/2048-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8de61e8e0342d54b0ae44b937ecb3952c4d2a94c
[INFO] testing pierrechevalier83/2048-rs against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpierrechevalier83%2F2048-rs" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pierrechevalier83/2048-rs on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/pierrechevalier83/2048-rs
[INFO] finished tweaking git repo https://github.com/pierrechevalier83/2048-rs
[INFO] tweaked toml for git repo https://github.com/pierrechevalier83/2048-rs written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/pierrechevalier83/2048-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 097ae4ca57ab213df0fee23d65a38c763a2ad79292a15e931c57525288cfa47e
[INFO] running `"docker" "start" "-a" "097ae4ca57ab213df0fee23d65a38c763a2ad79292a15e931c57525288cfa47e"`
[INFO] [stderr]    Compiling num-traits v0.1.37
[INFO] [stderr]    Compiling libc v0.2.20
[INFO] [stderr]    Compiling rustc-serialize v0.3.22
[INFO] [stderr]    Compiling ansi_term v0.9.0
[INFO] [stderr]    Compiling unicode-segmentation v1.1.0
[INFO] [stderr]    Compiling matrix_display v0.3.0
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling termion v1.2.0
[INFO] [stderr]    Compiling num-integer v0.1.33
[INFO] [stderr]    Compiling num-iter v0.1.33
[INFO] [stderr]    Compiling num-bigint v0.1.36
[INFO] [stderr]    Compiling num-complex v0.1.36
[INFO] [stderr]    Compiling num-rational v0.1.36
[INFO] [stderr]    Compiling num v0.1.37
[INFO] [stderr]    Compiling game-2048 v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
[INFO] [stderr]   --> src/game.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 | /         self.data
[INFO] [stderr] 70 | |             .chunks_mut(4)
[INFO] [stderr] 71 | |             .map(|row| {
[INFO] [stderr] 72 | |                 let (new_row, new_score) = match dir {
[INFO] [stderr] ...  |
[INFO] [stderr] 87 | |             })
[INFO] [stderr] 88 | |             .collect::<Vec<_>>();
[INFO] [stderr]    | |_________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.43s
[INFO] running `"docker" "inspect" "097ae4ca57ab213df0fee23d65a38c763a2ad79292a15e931c57525288cfa47e"`
[INFO] running `"docker" "rm" "-f" "097ae4ca57ab213df0fee23d65a38c763a2ad79292a15e931c57525288cfa47e"`
[INFO] [stdout] 097ae4ca57ab213df0fee23d65a38c763a2ad79292a15e931c57525288cfa47e
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5cf10d3089f1ba975686a6a8dddb4519997e700390ef7d846a6eca1cc23b1724
[INFO] running `"docker" "start" "-a" "5cf10d3089f1ba975686a6a8dddb4519997e700390ef7d846a6eca1cc23b1724"`
[INFO] [stderr]    Compiling game-2048 v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
[INFO] [stderr]   --> src/game.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 | /         self.data
[INFO] [stderr] 70 | |             .chunks_mut(4)
[INFO] [stderr] 71 | |             .map(|row| {
[INFO] [stderr] 72 | |                 let (new_row, new_score) = match dir {
[INFO] [stderr] ...  |
[INFO] [stderr] 87 | |             })
[INFO] [stderr] 88 | |             .collect::<Vec<_>>();
[INFO] [stderr]    | |_________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.29s
[INFO] running `"docker" "inspect" "5cf10d3089f1ba975686a6a8dddb4519997e700390ef7d846a6eca1cc23b1724"`
[INFO] running `"docker" "rm" "-f" "5cf10d3089f1ba975686a6a8dddb4519997e700390ef7d846a6eca1cc23b1724"`
[INFO] [stdout] 5cf10d3089f1ba975686a6a8dddb4519997e700390ef7d846a6eca1cc23b1724
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 003a467471a0cb476835271d7665a755f165a6923e4d7bb59e3ce640469d9b11
[INFO] running `"docker" "start" "-a" "003a467471a0cb476835271d7665a755f165a6923e4d7bb59e3ce640469d9b11"`
[INFO] [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
[INFO] [stderr]   --> src/game.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 | /         self.data
[INFO] [stderr] 70 | |             .chunks_mut(4)
[INFO] [stderr] 71 | |             .map(|row| {
[INFO] [stderr] 72 | |                 let (new_row, new_score) = match dir {
[INFO] [stderr] ...  |
[INFO] [stderr] 87 | |             })
[INFO] [stderr] 88 | |             .collect::<Vec<_>>();
[INFO] [stderr]    | |_________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.19s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/game_2048-8275c0577cb10065
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_two_different_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_two_same_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_three_same_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_three_different_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_four_different_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_four_different_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_four_same_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_left_with_one_element ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_four_same_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_one_element ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_two_different_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_two_same_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_three_different_elements ... ok
[INFO] [stdout] test algorithm::slide_test::test_slide_right_with_three_same_elements ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "003a467471a0cb476835271d7665a755f165a6923e4d7bb59e3ce640469d9b11"`
[INFO] running `"docker" "rm" "-f" "003a467471a0cb476835271d7665a755f165a6923e4d7bb59e3ce640469d9b11"`
[INFO] [stdout] 003a467471a0cb476835271d7665a755f165a6923e4d7bb59e3ce640469d9b11