[INFO] updating cached repository https://github.com/bwhetherington/rust-2048
[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] c80aad95941ca1f8797613d73ab44044c3178f40
[INFO] checking bwhetherington/rust-2048 against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbwhetherington%2Frust-2048" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bwhetherington/rust-2048 on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/bwhetherington/rust-2048
[INFO] finished tweaking git repo https://github.com/bwhetherington/rust-2048
[INFO] tweaked toml for git repo https://github.com/bwhetherington/rust-2048 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/bwhetherington/rust-2048 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e5064db66be976b8de7252ee458b7fd5497f367201ca12e41b550acb8bfb99d9
[INFO] running `"docker" "start" "-a" "e5064db66be976b8de7252ee458b7fd5497f367201ca12e41b550acb8bfb99d9"`
[INFO] [stderr]     Checking rust-2048-2 v0.1.0 (/opt/rustwide/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 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it with an underscore: `_dest`
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it with an underscore: `_dest`
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `"docker" "inspect" "e5064db66be976b8de7252ee458b7fd5497f367201ca12e41b550acb8bfb99d9"`
[INFO] running `"docker" "rm" "-f" "e5064db66be976b8de7252ee458b7fd5497f367201ca12e41b550acb8bfb99d9"`
[INFO] [stdout] e5064db66be976b8de7252ee458b7fd5497f367201ca12e41b550acb8bfb99d9