[INFO] updating cached repository kbknapp/cli2048-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kbknapp/cli2048-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kbknapp/cli2048-rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/kbknapp/cli2048-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/kbknapp/cli2048-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kbknapp/cli2048-rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kbknapp/cli2048-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kbknapp/cli2048-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 22aeeb9704928402819c251c925cdd35e48ed498
[INFO] sha for GitHub repo kbknapp/cli2048-rs: 22aeeb9704928402819c251c925cdd35e48ed498
[INFO] validating manifest of kbknapp/cli2048-rs on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of kbknapp/cli2048-rs on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing kbknapp/cli2048-rs
[INFO] finished frobbing kbknapp/cli2048-rs
[INFO] frobbed toml for kbknapp/cli2048-rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/kbknapp/cli2048-rs/Cargo.toml
[INFO] started frobbing kbknapp/cli2048-rs
[INFO] finished frobbing kbknapp/cli2048-rs
[INFO] frobbed toml for kbknapp/cli2048-rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kbknapp/cli2048-rs/Cargo.toml
[INFO] crate kbknapp/cli2048-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kbknapp/cli2048-rs/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing kbknapp/cli2048-rs against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kbknapp/cli2048-rs:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 00a15b7394816357fccd014018dc236b07464a8e9213f4fd4706748992eb05fe
[INFO] running `"docker" "start" "-a" "00a15b7394816357fccd014018dc236b07464a8e9213f4fd4706748992eb05fe"`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling cli2048-rs v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Matrix`
[INFO] [stderr]  --> src/matrix.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Matrix {
[INFO] [stderr]   | ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `matches`
[INFO] [stderr]  --> src/main.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let matches = App::new("cli2048")
[INFO] [stderr]   |         ^^^^^^^ help: consider prefixing with an underscore: `_matches`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.07s
[INFO] running `"docker" "inspect" "00a15b7394816357fccd014018dc236b07464a8e9213f4fd4706748992eb05fe"`
[INFO] running `"docker" "rm" "-f" "00a15b7394816357fccd014018dc236b07464a8e9213f4fd4706748992eb05fe"`
[INFO] [stdout] 00a15b7394816357fccd014018dc236b07464a8e9213f4fd4706748992eb05fe
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kbknapp/cli2048-rs:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] d8f7818b390e7c1b794da7cbd64dd39e398ab07d93e305f72beb73e0efaa847f
[INFO] running `"docker" "start" "-a" "d8f7818b390e7c1b794da7cbd64dd39e398ab07d93e305f72beb73e0efaa847f"`
[INFO] [stderr]    Compiling cli2048-rs v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Matrix`
[INFO] [stderr]  --> src/matrix.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Matrix {
[INFO] [stderr]   | ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `matches`
[INFO] [stderr]  --> src/main.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let matches = App::new("cli2048")
[INFO] [stderr]   |         ^^^^^^^ help: consider prefixing with an underscore: `_matches`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
[INFO] running `"docker" "inspect" "d8f7818b390e7c1b794da7cbd64dd39e398ab07d93e305f72beb73e0efaa847f"`
[INFO] running `"docker" "rm" "-f" "d8f7818b390e7c1b794da7cbd64dd39e398ab07d93e305f72beb73e0efaa847f"`
[INFO] [stdout] d8f7818b390e7c1b794da7cbd64dd39e398ab07d93e305f72beb73e0efaa847f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kbknapp/cli2048-rs:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 39846ef7bb3f5debcaeb36b357d5fe6a3058f8412cc6e5060870ef44fc098c15
[INFO] running `"docker" "start" "-a" "39846ef7bb3f5debcaeb36b357d5fe6a3058f8412cc6e5060870ef44fc098c15"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cli2048_rs-e59cec7032090125
[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] [stderr]      Running /opt/crater/target/debug/deps/cli2048_rs-aff3d4224c4e8ab2
[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] [stderr]    Doc-tests cli2048-rs
[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" "39846ef7bb3f5debcaeb36b357d5fe6a3058f8412cc6e5060870ef44fc098c15"`
[INFO] running `"docker" "rm" "-f" "39846ef7bb3f5debcaeb36b357d5fe6a3058f8412cc6e5060870ef44fc098c15"`
[INFO] [stdout] 39846ef7bb3f5debcaeb36b357d5fe6a3058f8412cc6e5060870ef44fc098c15