[INFO] updating cached repository bouncenow/advent-of-code-2018-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/bouncenow/advent-of-code-2018-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/bouncenow/advent-of-code-2018-rust" "work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/bouncenow/advent-of-code-2018-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/bouncenow/advent-of-code-2018-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bouncenow/advent-of-code-2018-rust" "work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/bouncenow/advent-of-code-2018-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/bouncenow/advent-of-code-2018-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2991f1d3b24cd95b7c252edd89c8d0519ec5312d
[INFO] sha for GitHub repo bouncenow/advent-of-code-2018-rust: 2991f1d3b24cd95b7c252edd89c8d0519ec5312d
[INFO] validating manifest of bouncenow/advent-of-code-2018-rust on toolchain master#1891bfa80364eead426517c68de6947b7692e2de
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of bouncenow/advent-of-code-2018-rust on toolchain try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing bouncenow/advent-of-code-2018-rust
[INFO] finished frobbing bouncenow/advent-of-code-2018-rust
[INFO] frobbed toml for bouncenow/advent-of-code-2018-rust written to work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/bouncenow/advent-of-code-2018-rust/Cargo.toml
[INFO] started frobbing bouncenow/advent-of-code-2018-rust
[INFO] finished frobbing bouncenow/advent-of-code-2018-rust
[INFO] frobbed toml for bouncenow/advent-of-code-2018-rust written to work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/bouncenow/advent-of-code-2018-rust/Cargo.toml
[INFO] crate bouncenow/advent-of-code-2018-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking bouncenow/advent-of-code-2018-rust against master#1891bfa80364eead426517c68de6947b7692e2de for pr-60261
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60261/worker-7/master#1891bfa80364eead426517c68de6947b7692e2de:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/bouncenow/advent-of-code-2018-rust:/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" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6be67f36e848fd37d5bfe958d9684ef17ca9e1c8958bce1296367a769a1eb6ae
[INFO] running `"docker" "start" "-a" "6be67f36e848fd37d5bfe958d9684ef17ca9e1c8958bce1296367a769a1eb6ae"`
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]     Checking scan_fmt v0.1.3
[INFO] [stderr]     Checking rayon v1.0.3
[INFO] [stderr]     Checking raoc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `core::str::<impl str>::trim` that must be used
[INFO] [stderr]   --> src/ch5.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     polymers.trim();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this returns the trimmed string as a slice, without modifying the original
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::str::<impl str>::trim` that must be used
[INFO] [stderr]   --> src/ch5.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     polymers.trim();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this returns the trimmed string as a slice, without modifying the original
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.68s
[INFO] running `"docker" "inspect" "6be67f36e848fd37d5bfe958d9684ef17ca9e1c8958bce1296367a769a1eb6ae"`
[INFO] running `"docker" "rm" "-f" "6be67f36e848fd37d5bfe958d9684ef17ca9e1c8958bce1296367a769a1eb6ae"`
[INFO] [stdout] 6be67f36e848fd37d5bfe958d9684ef17ca9e1c8958bce1296367a769a1eb6ae