[INFO] updating cached repository sts10/advent-of-code-2018
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sts10/advent-of-code-2018
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sts10/advent-of-code-2018" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/sts10/advent-of-code-2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/sts10/advent-of-code-2018'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sts10/advent-of-code-2018" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/sts10/advent-of-code-2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/sts10/advent-of-code-2018'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 749149d5dd3fec7f50af6c186c64fae199e3643b
[INFO] sha for GitHub repo sts10/advent-of-code-2018: 749149d5dd3fec7f50af6c186c64fae199e3643b
[INFO] validating manifest of sts10/advent-of-code-2018 on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sts10/advent-of-code-2018 on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sts10/advent-of-code-2018
[INFO] finished frobbing sts10/advent-of-code-2018
[INFO] frobbed toml for sts10/advent-of-code-2018 written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/sts10/advent-of-code-2018/Cargo.toml
[INFO] started frobbing sts10/advent-of-code-2018
[INFO] finished frobbing sts10/advent-of-code-2018
[INFO] frobbed toml for sts10/advent-of-code-2018 written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/sts10/advent-of-code-2018/Cargo.toml
[INFO] crate sts10/advent-of-code-2018 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking sts10/advent-of-code-2018 against master#0f88167f89fffe321590c5148f21b7d51d44388d for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-4/master#0f88167f89fffe321590c5148f21b7d51d44388d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/sts10/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" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3f044aaf84b61f42ede57299e9d2c55fdb043fbe36e806a4ea22239dd5192aec
[INFO] running `"docker" "start" "-a" "3f044aaf84b61f42ede57299e9d2c55fdb043fbe36e806a4ea22239dd5192aec"`
[INFO] [stderr]     Checking advent-of-code-2018-reorganized v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `guards`
[INFO] [stderr]   --> src/bin/day04_bad_attempt.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let mut guards: HashMap<usize, Guard> = HashMap::new();
[INFO] [stderr]    |             ^^^^^^ help: consider prefixing with an underscore: `_guards`
[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/bin/day04_bad_attempt.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let mut guards: HashMap<usize, Guard> = HashMap::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 variable: `guards`
[INFO] [stderr]   --> src/bin/day04_bad_attempt.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let mut guards: HashMap<usize, Guard> = HashMap::new();
[INFO] [stderr]    |             ^^^^^^ help: consider prefixing with an underscore: `_guards`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_grid`
[INFO] [stderr]   --> src/bin/day06.rs:32:21
[INFO] [stderr]    |
[INFO] [stderr] 32 |                 let new_grid = spread(x, y, grid);
[INFO] [stderr]    |                     ^^^^^^^^ help: consider prefixing with an underscore: `_new_grid`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `square` is never read
[INFO] [stderr]   --> src/bin/day06.rs:51:20
[INFO] [stderr]    |
[INFO] [stderr] 51 |             "." => square = sign,
[INFO] [stderr]    |                    ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/day04_bad_attempt.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let mut guards: HashMap<usize, Guard> = HashMap::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] error[E0384]: cannot assign twice to immutable variable `square`
[INFO] [stderr]   --> src/bin/day06.rs:51:20
[INFO] [stderr]    |
[INFO] [stderr] 49 |     for square in nine_squares {
[INFO] [stderr]    |         ------ first assignment to `square`
[INFO] [stderr] 50 |         match square {
[INFO] [stderr] 51 |             "." => square = sign,
[INFO] [stderr]    |                    ^^^^^^^^^^^^^ cannot assign twice to immutable variable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0384`.
[INFO] [stderr] error: Could not compile `advent-of-code-2018-reorganized`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: function `returns_None_if_more_than_one_character_off` should have a snake case name
[INFO] [stderr]    --> src/bin/day02.rs:144:4
[INFO] [stderr]     |
[INFO] [stderr] 144 | fn returns_None_if_more_than_one_character_off() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `returns_none_if_more_than_one_character_off`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `returns_None_if_exact_match` should have a snake case name
[INFO] [stderr]    --> src/bin/day02.rs:155:4
[INFO] [stderr]     |
[INFO] [stderr] 155 | fn returns_None_if_exact_match() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `returns_none_if_exact_match`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_grid`
[INFO] [stderr]   --> src/bin/day06.rs:32:21
[INFO] [stderr]    |
[INFO] [stderr] 32 |                 let new_grid = spread(x, y, grid);
[INFO] [stderr]    |                     ^^^^^^^^ help: consider prefixing with an underscore: `_new_grid`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `square` is never read
[INFO] [stderr]   --> src/bin/day06.rs:51:20
[INFO] [stderr]    |
[INFO] [stderr] 51 |             "." => square = sign,
[INFO] [stderr]    |                    ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] error[E0384]: cannot assign twice to immutable variable `square`
[INFO] [stderr]   --> src/bin/day06.rs:51:20
[INFO] [stderr]    |
[INFO] [stderr] 49 |     for square in nine_squares {
[INFO] [stderr]    |         ------ first assignment to `square`
[INFO] [stderr] 50 |         match square {
[INFO] [stderr] 51 |             "." => square = sign,
[INFO] [stderr]    |                    ^^^^^^^^^^^^^ cannot assign twice to immutable variable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0384`.
[INFO] [stderr] error: Could not compile `advent-of-code-2018-reorganized`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3f044aaf84b61f42ede57299e9d2c55fdb043fbe36e806a4ea22239dd5192aec"`
[INFO] running `"docker" "rm" "-f" "3f044aaf84b61f42ede57299e9d2c55fdb043fbe36e806a4ea22239dd5192aec"`
[INFO] [stdout] 3f044aaf84b61f42ede57299e9d2c55fdb043fbe36e806a4ea22239dd5192aec