[INFO] updating cached repository prakhar1989/advent-of-code-2018
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/prakhar1989/advent-of-code-2018
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/prakhar1989/advent-of-code-2018" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/prakhar1989/advent-of-code-2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/prakhar1989/advent-of-code-2018'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/prakhar1989/advent-of-code-2018" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/prakhar1989/advent-of-code-2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/prakhar1989/advent-of-code-2018'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 801634031ea2197439c5778b6239b30f73406fc0
[INFO] sha for GitHub repo prakhar1989/advent-of-code-2018: 801634031ea2197439c5778b6239b30f73406fc0
[INFO] validating manifest of prakhar1989/advent-of-code-2018 on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of prakhar1989/advent-of-code-2018 on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing prakhar1989/advent-of-code-2018
[INFO] finished frobbing prakhar1989/advent-of-code-2018
[INFO] frobbed toml for prakhar1989/advent-of-code-2018 written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/prakhar1989/advent-of-code-2018/Cargo.toml
[INFO] started frobbing prakhar1989/advent-of-code-2018
[INFO] finished frobbing prakhar1989/advent-of-code-2018
[INFO] frobbed toml for prakhar1989/advent-of-code-2018 written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/prakhar1989/advent-of-code-2018/Cargo.toml
[INFO] crate prakhar1989/advent-of-code-2018 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking prakhar1989/advent-of-code-2018 against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-6/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/prakhar1989/advent-of-code-2018:/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" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a0f6b50d71db1b31ecaa642bd86e738ed62add338e6f0e5548db6a864d69dfa0
[INFO] running `"docker" "start" "-a" "a0f6b50d71db1b31ecaa642bd86e738ed62add338e6f0e5548db6a864d69dfa0"`
[INFO] [stderr]     Checking md5 v0.6.0
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]     Checking advent-of-code-2018 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `rows`
[INFO] [stderr]   --> src/matrix.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn rows(&self) -> impl Iterator<Item = Vec<&T>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.03s
[INFO] running `"docker" "inspect" "a0f6b50d71db1b31ecaa642bd86e738ed62add338e6f0e5548db6a864d69dfa0"`
[INFO] running `"docker" "rm" "-f" "a0f6b50d71db1b31ecaa642bd86e738ed62add338e6f0e5548db6a864d69dfa0"`
[INFO] [stdout] a0f6b50d71db1b31ecaa642bd86e738ed62add338e6f0e5548db6a864d69dfa0