[INFO] updating cached repository sethsamuel/adventofcode-2018
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sethsamuel/adventofcode-2018
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sethsamuel/adventofcode-2018" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/sethsamuel/adventofcode-2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/sethsamuel/adventofcode-2018'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sethsamuel/adventofcode-2018" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/sethsamuel/adventofcode-2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/sethsamuel/adventofcode-2018'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6644d3395ce6f7ef4cdb9629c38d348d3efdd905
[INFO] sha for GitHub repo sethsamuel/adventofcode-2018: 6644d3395ce6f7ef4cdb9629c38d348d3efdd905
[INFO] validating manifest of sethsamuel/adventofcode-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 sethsamuel/adventofcode-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 sethsamuel/adventofcode-2018
[INFO] finished frobbing sethsamuel/adventofcode-2018
[INFO] frobbed toml for sethsamuel/adventofcode-2018 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/sethsamuel/adventofcode-2018/Cargo.toml
[INFO] started frobbing sethsamuel/adventofcode-2018
[INFO] finished frobbing sethsamuel/adventofcode-2018
[INFO] frobbed toml for sethsamuel/adventofcode-2018 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/sethsamuel/adventofcode-2018/Cargo.toml
[INFO] crate sethsamuel/adventofcode-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 sethsamuel/adventofcode-2018 against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-6/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/sethsamuel/adventofcode-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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 507d4420b1aa68b32e1a5b9d535cf8149e43d0e5b6f00bc1fe50b2cd40999619
[INFO] running `"docker" "start" "-a" "507d4420b1aa68b32e1a5b9d535cf8149e43d0e5b6f00bc1fe50b2cd40999619"`
[INFO] [stderr]     Checking tempfile v2.2.0
[INFO] [stderr]     Checking skiplist v0.2.10
[INFO] [stderr]     Checking dialoguer v0.3.0
[INFO] [stderr]     Checking adventofcode-2018 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:35:41
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn _puzzle_prompt() -> Result<bool, Box<std::error::Error>> {
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[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/main.rs:35:41
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn _puzzle_prompt() -> Result<bool, Box<std::error::Error>> {
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `total_plants` is assigned to, but never used
[INFO] [stderr]   --> src/day_12/mod.rs:37:13
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let mut total_plants = initial_state.clone().filter(|c| *c == PLANT).count();
[INFO] [stderr]    |             ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]    = note: consider using `_total_plants` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable `total_plants` is assigned to, but never used
[INFO] [stderr]   --> src/day_12/mod.rs:37:13
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let mut total_plants = initial_state.clone().filter(|c| *c == PLANT).count();
[INFO] [stderr]    |             ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]    = note: consider using `_total_plants` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/day_7/mod.rs:155:25
[INFO] [stderr]     |
[INFO] [stderr] 155 |                     let mut next_step = next_steps[0];
[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/day_7/mod.rs:155:25
[INFO] [stderr]     |
[INFO] [stderr] 155 |                     let mut next_step = next_steps[0];
[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 4.36s
[INFO] running `"docker" "inspect" "507d4420b1aa68b32e1a5b9d535cf8149e43d0e5b6f00bc1fe50b2cd40999619"`
[INFO] running `"docker" "rm" "-f" "507d4420b1aa68b32e1a5b9d535cf8149e43d0e5b6f00bc1fe50b2cd40999619"`
[INFO] [stdout] 507d4420b1aa68b32e1a5b9d535cf8149e43d0e5b6f00bc1fe50b2cd40999619