[INFO] updating cached repository dhartunian/advent-of-code-2018
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dhartunian/advent-of-code-2018
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dhartunian/advent-of-code-2018" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/dhartunian/advent-of-code-2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/dhartunian/advent-of-code-2018'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dhartunian/advent-of-code-2018" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/dhartunian/advent-of-code-2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/dhartunian/advent-of-code-2018'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0ccb6ff4a6a92c7360daecc1e2ce0a5a940201ee
[INFO] sha for GitHub repo dhartunian/advent-of-code-2018: 0ccb6ff4a6a92c7360daecc1e2ce0a5a940201ee
[INFO] validating manifest of dhartunian/advent-of-code-2018 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dhartunian/advent-of-code-2018 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing dhartunian/advent-of-code-2018
[INFO] finished frobbing dhartunian/advent-of-code-2018
[INFO] frobbed toml for dhartunian/advent-of-code-2018 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/dhartunian/advent-of-code-2018/Cargo.toml
[INFO] started frobbing dhartunian/advent-of-code-2018
[INFO] finished frobbing dhartunian/advent-of-code-2018
[INFO] frobbed toml for dhartunian/advent-of-code-2018 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/dhartunian/advent-of-code-2018/Cargo.toml
[INFO] crate dhartunian/advent-of-code-2018 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking dhartunian/advent-of-code-2018 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-2/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0eb0072c9f9b16ae8bc2c502161557832af722f9d73060d5d2cfcc181be126d4
[INFO] running `"docker" "start" "-a" "0eb0072c9f9b16ae8bc2c502161557832af722f9d73060d5d2cfcc181be126d4"`
[INFO] [stderr]     Checking advent-of-code-2018 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `char_difference`
[INFO] [stderr]    --> src/main.rs:332:1
[INFO] [stderr]     |
[INFO] [stderr] 332 | fn char_difference(word1 : &String, word2 : &String) -> bool {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_letter_counts`
[INFO] [stderr]    --> src/main.rs:372:1
[INFO] [stderr]     |
[INFO] [stderr] 372 | fn get_letter_counts(word: &str) -> HashMap<char, i32> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `char_difference`
[INFO] [stderr]    --> src/main.rs:332:1
[INFO] [stderr]     |
[INFO] [stderr] 332 | fn char_difference(word1 : &String, word2 : &String) -> bool {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_letter_counts`
[INFO] [stderr]    --> src/main.rs:372:1
[INFO] [stderr]     |
[INFO] [stderr] 372 | fn get_letter_counts(word: &str) -> HashMap<char, i32> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "0eb0072c9f9b16ae8bc2c502161557832af722f9d73060d5d2cfcc181be126d4"`
[INFO] running `"docker" "rm" "-f" "0eb0072c9f9b16ae8bc2c502161557832af722f9d73060d5d2cfcc181be126d4"`
[INFO] [stdout] 0eb0072c9f9b16ae8bc2c502161557832af722f9d73060d5d2cfcc181be126d4