[INFO] updating cached repository robertmaloney/advent2017
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/robertmaloney/advent2017
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/robertmaloney/advent2017" "work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/robertmaloney/advent2017"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/robertmaloney/advent2017'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/robertmaloney/advent2017" "work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/robertmaloney/advent2017"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/robertmaloney/advent2017'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 180761b70ebc080de44760d929554b0056d36220
[INFO] sha for GitHub repo robertmaloney/advent2017: 180761b70ebc080de44760d929554b0056d36220
[INFO] validating manifest of robertmaloney/advent2017 on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of robertmaloney/advent2017 on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing robertmaloney/advent2017
[INFO] finished frobbing robertmaloney/advent2017
[INFO] frobbed toml for robertmaloney/advent2017 written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/robertmaloney/advent2017/Cargo.toml
[INFO] started frobbing robertmaloney/advent2017
[INFO] finished frobbing robertmaloney/advent2017
[INFO] frobbed toml for robertmaloney/advent2017 written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/robertmaloney/advent2017/Cargo.toml
[INFO] crate robertmaloney/advent2017 has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking robertmaloney/advent2017 against try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-5/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/robertmaloney/advent2017:/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" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ceaaff3f468cb9a7014aca6bbdce0f9560a8011944387ab56448aced76757c5e
[INFO] running `"docker" "start" "-a" "ceaaff3f468cb9a7014aca6bbdce0f9560a8011944387ab56448aced76757c5e"`
[INFO] [stderr]     Checking advent2017 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `max_min_difference`
[INFO] [stderr]  --> src/day_two/mod.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn max_min_difference<T: Iterator<Item=u32>>(iter: T) -> u32 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `value`
[INFO] [stderr]  --> src/day_three/mod.rs:6:3
[INFO] [stderr]   |
[INFO] [stderr] 6 |   value: i32,
[INFO] [stderr]   |   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/util/mod.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   reader.read_to_string(&mut buffer);
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `max_min_difference`
[INFO] [stderr]  --> src/day_two/mod.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn max_min_difference<T: Iterator<Item=u32>>(iter: T) -> u32 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `value`
[INFO] [stderr]  --> src/day_three/mod.rs:6:3
[INFO] [stderr]   |
[INFO] [stderr] 6 |   value: i32,
[INFO] [stderr]   |   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/util/mod.rs:11:3
[INFO] [stderr]    |
[INFO] [stderr] 11 |   reader.read_to_string(&mut buffer);
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `"docker" "inspect" "ceaaff3f468cb9a7014aca6bbdce0f9560a8011944387ab56448aced76757c5e"`
[INFO] running `"docker" "rm" "-f" "ceaaff3f468cb9a7014aca6bbdce0f9560a8011944387ab56448aced76757c5e"`
[INFO] [stdout] ceaaff3f468cb9a7014aca6bbdce0f9560a8011944387ab56448aced76757c5e