[INFO] updating cached repository iamdanfox/advent2018
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/iamdanfox/advent2018
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/iamdanfox/advent2018" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/iamdanfox/advent2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/iamdanfox/advent2018'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/iamdanfox/advent2018" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/iamdanfox/advent2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/iamdanfox/advent2018'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e7fcefafb4546c228656d98291ab8d7f5c4bf389
[INFO] sha for GitHub repo iamdanfox/advent2018: e7fcefafb4546c228656d98291ab8d7f5c4bf389
[INFO] validating manifest of iamdanfox/advent2018 on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of iamdanfox/advent2018 on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing iamdanfox/advent2018
[INFO] finished frobbing iamdanfox/advent2018
[INFO] frobbed toml for iamdanfox/advent2018 written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/iamdanfox/advent2018/Cargo.toml
[INFO] started frobbing iamdanfox/advent2018
[INFO] finished frobbing iamdanfox/advent2018
[INFO] frobbed toml for iamdanfox/advent2018 written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/iamdanfox/advent2018/Cargo.toml
[INFO] crate iamdanfox/advent2018 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking iamdanfox/advent2018 against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-6/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/iamdanfox/advent2018:/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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e29cd868631b1eda8d66e7c6246915f186465a8b65f162b8cf371f9d4aa35645
[INFO] running `"docker" "start" "-a" "e29cd868631b1eda8d66e7c6246915f186465a8b65f162b8cf371f9d4aa35645"`
[INFO] [stderr]     Checking multiset v0.0.5
[INFO] [stderr]     Checking advent2018 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/day9.rs:42:35
[INFO] [stderr]    |
[INFO] [stderr] 42 |         fn into_iter(self) -> Box<Iterator<Item = Marble>>;
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Marble>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/day9.rs:281:35
[INFO] [stderr]     |
[INFO] [stderr] 281 |         fn into_iter(self) -> Box<Iterator<Item = Marble>> {
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Marble>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/day9.rs:342:35
[INFO] [stderr]     |
[INFO] [stderr] 342 |         fn into_iter(self) -> Box<Iterator<Item = Marble>> {
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Marble>`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashSet`
[INFO] [stderr]  --> src/day10.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     use std::collections::HashSet;
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::Skip`
[INFO] [stderr]  --> src/day10.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     use std::iter::Skip;
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start_time`
[INFO] [stderr]    --> src/day10.rs:257:13
[INFO] [stderr]     |
[INFO] [stderr] 257 |         let start_time = samples[0].0;
[INFO] [stderr]     |             ^^^^^^^^^^ help: consider prefixing with an underscore: `_start_time`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day10.rs:54:31
[INFO] [stderr]    |
[INFO] [stderr] 54 |             fn nth(&mut self, mut n: usize) -> Option<Self::Item> {
[INFO] [stderr]    |                               ----^
[INFO] [stderr]    |                               |
[INFO] [stderr]    |                               help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.48s
[INFO] running `"docker" "inspect" "e29cd868631b1eda8d66e7c6246915f186465a8b65f162b8cf371f9d4aa35645"`
[INFO] running `"docker" "rm" "-f" "e29cd868631b1eda8d66e7c6246915f186465a8b65f162b8cf371f9d4aa35645"`
[INFO] [stdout] e29cd868631b1eda8d66e7c6246915f186465a8b65f162b8cf371f9d4aa35645