[INFO] updating cached repository sagalasan/advent-of-code-2018
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sagalasan/advent-of-code-2018
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sagalasan/advent-of-code-2018" "work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/gh/sagalasan/advent-of-code-2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/gh/sagalasan/advent-of-code-2018'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sagalasan/advent-of-code-2018" "work/ex/pr-57609/sources/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315/gh/sagalasan/advent-of-code-2018"`
[INFO] [stderr] Cloning into 'work/ex/pr-57609/sources/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315/gh/sagalasan/advent-of-code-2018'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b536b7af9218d5ef9ffb11dc857519144aa47133
[INFO] sha for GitHub repo sagalasan/advent-of-code-2018: b536b7af9218d5ef9ffb11dc857519144aa47133
[INFO] validating manifest of sagalasan/advent-of-code-2018 on toolchain master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sagalasan/advent-of-code-2018 on toolchain try#26f8d250bb3c8a85e812cf663c730ef9e0df9315
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+26f8d250bb3c8a85e812cf663c730ef9e0df9315-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sagalasan/advent-of-code-2018
[INFO] finished frobbing sagalasan/advent-of-code-2018
[INFO] frobbed toml for sagalasan/advent-of-code-2018 written to work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/gh/sagalasan/advent-of-code-2018/Cargo.toml
[INFO] started frobbing sagalasan/advent-of-code-2018
[INFO] finished frobbing sagalasan/advent-of-code-2018
[INFO] frobbed toml for sagalasan/advent-of-code-2018 written to work/ex/pr-57609/sources/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315/gh/sagalasan/advent-of-code-2018/Cargo.toml
[INFO] crate sagalasan/advent-of-code-2018 has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+26f8d250bb3c8a85e812cf663c730ef9e0df9315-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking sagalasan/advent-of-code-2018 against master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a for pr-57609
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57609/worker-0/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/gh/sagalasan/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" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7426bc6b169ffcafdbac8951161b8d44c979506cd52676a0b4812698e25065aa
[INFO] running `"docker" "start" "-a" "7426bc6b169ffcafdbac8951161b8d44c979506cd52676a0b4812698e25065aa"`
[INFO] [stderr]     Checking backtrace-sys v0.1.24
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]     Checking failure v0.1.3
[INFO] [stderr]     Checking advent-of-code-2018 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/day03.rs:200:17
[INFO] [stderr]     |
[INFO] [stderr] 200 |                 write!(f, "{}", item);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/day03.rs:203:13
[INFO] [stderr]     |
[INFO] [stderr] 203 |             write!(f, "\n");
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/day03.rs:200:17
[INFO] [stderr]     |
[INFO] [stderr] 200 |                 write!(f, "{}", item);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/day03.rs:203:13
[INFO] [stderr]     |
[INFO] [stderr] 203 |             write!(f, "\n");
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.72s
[INFO] running `"docker" "inspect" "7426bc6b169ffcafdbac8951161b8d44c979506cd52676a0b4812698e25065aa"`
[INFO] running `"docker" "rm" "-f" "7426bc6b169ffcafdbac8951161b8d44c979506cd52676a0b4812698e25065aa"`
[INFO] [stdout] 7426bc6b169ffcafdbac8951161b8d44c979506cd52676a0b4812698e25065aa