Dec 19 17:59:35.321 INFO checking dhartunian/advent-of-code-2018 against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 17:59:35.321 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/dhartunian/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 17:59:35.567 INFO [stdout] 062eae7312b97aa5e577aa62bca0145ca9048497b76a8ce545abb7f9eec50bfb
Dec 19 17:59:35.569 INFO running `"docker" "start" "-a" "062eae7312b97aa5e577aa62bca0145ca9048497b76a8ce545abb7f9eec50bfb"`
Dec 19 17:59:36.432 INFO [stderr]     Checking advent-of-code-2018 v0.1.0 (/opt/crater/workdir)
Dec 19 17:59:36.692 INFO [stderr] warning: function is never used: `char_difference`
Dec 19 17:59:36.692 INFO [stderr]    --> src/main.rs:118:1
Dec 19 17:59:36.692 INFO [stderr]     |
Dec 19 17:59:36.693 INFO [stderr] 118 | fn char_difference(word1 : &String, word2 : &String) -> bool {
Dec 19 17:59:36.693 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 17:59:36.693 INFO [stderr]     |
Dec 19 17:59:36.693 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 19 17:59:36.693 INFO [stderr] 
Dec 19 17:59:36.693 INFO [stderr] warning: function is never used: `get_letter_counts`
Dec 19 17:59:36.693 INFO [stderr]    --> src/main.rs:158:1
Dec 19 17:59:36.693 INFO [stderr]     |
Dec 19 17:59:36.693 INFO [stderr] 158 | fn get_letter_counts(word: &str) -> HashMap<char, i32> {
Dec 19 17:59:36.693 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 17:59:36.693 INFO [stderr] 
Dec 19 17:59:36.727 INFO [stderr] warning: function is never used: `char_difference`
Dec 19 17:59:36.727 INFO [stderr]    --> src/main.rs:118:1
Dec 19 17:59:36.727 INFO [stderr]     |
Dec 19 17:59:36.727 INFO [stderr] 118 | fn char_difference(word1 : &String, word2 : &String) -> bool {
Dec 19 17:59:36.727 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 17:59:36.727 INFO [stderr]     |
Dec 19 17:59:36.727 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 19 17:59:36.727 INFO [stderr] 
Dec 19 17:59:36.727 INFO [stderr] warning: function is never used: `get_letter_counts`
Dec 19 17:59:36.727 INFO [stderr]    --> src/main.rs:158:1
Dec 19 17:59:36.727 INFO [stderr]     |
Dec 19 17:59:36.727 INFO [stderr] 158 | fn get_letter_counts(word: &str) -> HashMap<char, i32> {
Dec 19 17:59:36.727 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 17:59:36.727 INFO [stderr] 
Dec 19 17:59:36.744 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
Dec 19 17:59:37.099 INFO running `"docker" "inspect" "062eae7312b97aa5e577aa62bca0145ca9048497b76a8ce545abb7f9eec50bfb"`
Dec 19 17:59:37.181 INFO running `"docker" "rm" "-f" "062eae7312b97aa5e577aa62bca0145ca9048497b76a8ce545abb7f9eec50bfb"`
Dec 19 17:59:37.270 INFO [stdout] 062eae7312b97aa5e577aa62bca0145ca9048497b76a8ce545abb7f9eec50bfb