[INFO] updating cached repository bugabinga/aoc
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/bugabinga/aoc
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/bugabinga/aoc" "work/ex/beta-1.37-6/sources/1.36.0/gh/bugabinga/aoc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/bugabinga/aoc'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bugabinga/aoc" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/bugabinga/aoc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/bugabinga/aoc'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2835613ad8e961ce5a396391ced566a8d1954b1a
[INFO] sha for GitHub repo bugabinga/aoc: 2835613ad8e961ce5a396391ced566a8d1954b1a
[INFO] validating manifest of bugabinga/aoc 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 bugabinga/aoc 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 bugabinga/aoc
[INFO] finished frobbing bugabinga/aoc
[INFO] frobbed toml for bugabinga/aoc written to work/ex/beta-1.37-6/sources/1.36.0/gh/bugabinga/aoc/Cargo.toml
[INFO] started frobbing bugabinga/aoc
[INFO] finished frobbing bugabinga/aoc
[INFO] frobbed toml for bugabinga/aoc written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/bugabinga/aoc/Cargo.toml
[INFO] crate bugabinga/aoc 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 bugabinga/aoc against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/bugabinga/aoc:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 390643f3b4e6454901f7d58ee3490a0b424be85e0439c43a14017aaa0db2728c
[INFO] running `"docker" "start" "-a" "390643f3b4e6454901f7d58ee3490a0b424be85e0439c43a14017aaa0db2728c"`
[INFO] [stderr]    Compiling aoc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day_two.rs:76:17
[INFO] [stderr]    |
[INFO] [stderr] 76 |             let mut id_chars = id.chars();
[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 1.37s
[INFO] running `"docker" "inspect" "390643f3b4e6454901f7d58ee3490a0b424be85e0439c43a14017aaa0db2728c"`
[INFO] running `"docker" "rm" "-f" "390643f3b4e6454901f7d58ee3490a0b424be85e0439c43a14017aaa0db2728c"`
[INFO] [stdout] 390643f3b4e6454901f7d58ee3490a0b424be85e0439c43a14017aaa0db2728c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/bugabinga/aoc:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0a28d1b9ff5b847985195724cf229420d455dbc6a9b80cdc37b3b563609b8527
[INFO] running `"docker" "start" "-a" "0a28d1b9ff5b847985195724cf229420d455dbc6a9b80cdc37b3b563609b8527"`
[INFO] [stderr]    Compiling aoc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/day_two.rs:76:17
[INFO] [stderr]    |
[INFO] [stderr] 76 |             let mut id_chars = id.chars();
[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 0.97s
[INFO] running `"docker" "inspect" "0a28d1b9ff5b847985195724cf229420d455dbc6a9b80cdc37b3b563609b8527"`
[INFO] running `"docker" "rm" "-f" "0a28d1b9ff5b847985195724cf229420d455dbc6a9b80cdc37b3b563609b8527"`
[INFO] [stdout] 0a28d1b9ff5b847985195724cf229420d455dbc6a9b80cdc37b3b563609b8527
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/bugabinga/aoc:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 28fb0d6eb9386c238f5407805a5a7d7e6f2818e8e5169e20eb2a90724d4fcdfd
[INFO] running `"docker" "start" "-a" "28fb0d6eb9386c238f5407805a5a7d7e6f2818e8e5169e20eb2a90724d4fcdfd"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/aoc-b8d825d0d3252cbf
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "28fb0d6eb9386c238f5407805a5a7d7e6f2818e8e5169e20eb2a90724d4fcdfd"`
[INFO] running `"docker" "rm" "-f" "28fb0d6eb9386c238f5407805a5a7d7e6f2818e8e5169e20eb2a90724d4fcdfd"`
[INFO] [stdout] 28fb0d6eb9386c238f5407805a5a7d7e6f2818e8e5169e20eb2a90724d4fcdfd