[INFO] updating cached repository Swatinem/aoc2016
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Swatinem/aoc2016
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Swatinem/aoc2016" "work/ex/beta-1.37-6/sources/1.36.0/gh/Swatinem/aoc2016"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Swatinem/aoc2016'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Swatinem/aoc2016" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Swatinem/aoc2016"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Swatinem/aoc2016'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 27bcc5acd5f95fdaf6cc3cc37f0cb5c4f1405f41
[INFO] sha for GitHub repo Swatinem/aoc2016: 27bcc5acd5f95fdaf6cc3cc37f0cb5c4f1405f41
[INFO] validating manifest of Swatinem/aoc2016 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Swatinem/aoc2016 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Swatinem/aoc2016
[INFO] finished frobbing Swatinem/aoc2016
[INFO] frobbed toml for Swatinem/aoc2016 written to work/ex/beta-1.37-6/sources/1.36.0/gh/Swatinem/aoc2016/Cargo.toml
[INFO] started frobbing Swatinem/aoc2016
[INFO] finished frobbing Swatinem/aoc2016
[INFO] frobbed toml for Swatinem/aoc2016 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Swatinem/aoc2016/Cargo.toml
[INFO] crate Swatinem/aoc2016 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Swatinem/aoc2016 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/Swatinem/aoc2016:/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=warn" "-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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 270ebaed87bdb08ba3023744f72d4481b676aa24f586566eb168d82594e3114c
[INFO] running `"docker" "start" "-a" "270ebaed87bdb08ba3023744f72d4481b676aa24f586566eb168d82594e3114c"`
[INFO] [stderr]    Compiling aoc2016 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day1b.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let mut input = input;
[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 0.36s
[INFO] running `"docker" "inspect" "270ebaed87bdb08ba3023744f72d4481b676aa24f586566eb168d82594e3114c"`
[INFO] running `"docker" "rm" "-f" "270ebaed87bdb08ba3023744f72d4481b676aa24f586566eb168d82594e3114c"`
[INFO] [stdout] 270ebaed87bdb08ba3023744f72d4481b676aa24f586566eb168d82594e3114c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/Swatinem/aoc2016:/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=warn" "-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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] cd4a233cea6bd99921550f34159429fc8ee2a0c74519b6a03219966a4263770b
[INFO] running `"docker" "start" "-a" "cd4a233cea6bd99921550f34159429fc8ee2a0c74519b6a03219966a4263770b"`
[INFO] [stderr]    Compiling aoc2016 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day1b.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let mut input = input;
[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 1.47s
[INFO] running `"docker" "inspect" "cd4a233cea6bd99921550f34159429fc8ee2a0c74519b6a03219966a4263770b"`
[INFO] running `"docker" "rm" "-f" "cd4a233cea6bd99921550f34159429fc8ee2a0c74519b6a03219966a4263770b"`
[INFO] [stdout] cd4a233cea6bd99921550f34159429fc8ee2a0c74519b6a03219966a4263770b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/Swatinem/aoc2016:/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=warn" "-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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 11a312fa9b91ee0370a700fe95f23d61301c08cfd9d73174ae5e569ec95cd6f2
[INFO] running `"docker" "start" "-a" "11a312fa9b91ee0370a700fe95f23d61301c08cfd9d73174ae5e569ec95cd6f2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/aoc2016-18f7b608ca9d1fe3
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test day1a::test ... ok
[INFO] [stdout] test day2a::test ... ok
[INFO] [stdout] test day1b::test ... ok
[INFO] [stdout] test day2b::test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "11a312fa9b91ee0370a700fe95f23d61301c08cfd9d73174ae5e569ec95cd6f2"`
[INFO] running `"docker" "rm" "-f" "11a312fa9b91ee0370a700fe95f23d61301c08cfd9d73174ae5e569ec95cd6f2"`
[INFO] [stdout] 11a312fa9b91ee0370a700fe95f23d61301c08cfd9d73174ae5e569ec95cd6f2