[INFO] updating cached repository tahnok/advent2018
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tahnok/advent2018
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tahnok/advent2018" "work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/tahnok/advent2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/tahnok/advent2018'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tahnok/advent2018" "work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/tahnok/advent2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/tahnok/advent2018'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6a2ad81a69efaeff50789257718686fa8d575216
[INFO] sha for GitHub repo tahnok/advent2018: 6a2ad81a69efaeff50789257718686fa8d575216
[INFO] validating manifest of tahnok/advent2018 on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tahnok/advent2018 on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tahnok/advent2018
[INFO] finished frobbing tahnok/advent2018
[INFO] frobbed toml for tahnok/advent2018 written to work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/tahnok/advent2018/Cargo.toml
[INFO] started frobbing tahnok/advent2018
[INFO] finished frobbing tahnok/advent2018
[INFO] frobbed toml for tahnok/advent2018 written to work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/tahnok/advent2018/Cargo.toml
[INFO] crate tahnok/advent2018 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking tahnok/advent2018 against master#39401465da4ce27aeeb2c2a26133ac35c63aa515 for pr-60914
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60914/worker-0/master#39401465da4ce27aeeb2c2a26133ac35c63aa515:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/tahnok/advent2018:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] fc2038c90edcf44afdd33eeff9ce23a0452baf5f117635de90f38c71a551a953
[INFO] running `"docker" "start" "-a" "fc2038c90edcf44afdd33eeff9ce23a0452baf5f117635de90f38c71a551a953"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]    Compiling syn v0.15.22
[INFO] [stderr]    Compiling proc-macro-hack v0.5.3
[INFO] [stderr]    Compiling indoc-impl v0.3.1
[INFO] [stderr]     Checking indoc v0.3.1
[INFO] [stderr]     Checking advent2018 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0601]: `main` function not found in crate `utils`
[INFO] [stderr]   |
[INFO] [stderr]   = note: consider adding a `main` function to `src/bin/utils.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: Could not compile `advent2018`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/day_07_1.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |         let mut dependencies = result.entry(required_by).or_insert(HashSet::new());
[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] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/day_07_2.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |         let mut dependencies = result.entry(required_by).or_insert(HashSet::new());
[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] warning: unused import: `super::*`
[INFO] [stderr]   --> src/bin/template.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "fc2038c90edcf44afdd33eeff9ce23a0452baf5f117635de90f38c71a551a953"`
[INFO] running `"docker" "rm" "-f" "fc2038c90edcf44afdd33eeff9ce23a0452baf5f117635de90f38c71a551a953"`
[INFO] [stdout] fc2038c90edcf44afdd33eeff9ce23a0452baf5f117635de90f38c71a551a953