[INFO] updating cached repository cassava/aoc17.rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cassava/aoc17.rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cassava/aoc17.rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/cassava/aoc17.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/cassava/aoc17.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cassava/aoc17.rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cassava/aoc17.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cassava/aoc17.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d9ba0ef500b1e44302cddbaf3eb803214fe33c3d
[INFO] sha for GitHub repo cassava/aoc17.rs: d9ba0ef500b1e44302cddbaf3eb803214fe33c3d
[INFO] validating manifest of cassava/aoc17.rs on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cassava/aoc17.rs on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cassava/aoc17.rs
[INFO] finished frobbing cassava/aoc17.rs
[INFO] frobbed toml for cassava/aoc17.rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/cassava/aoc17.rs/Cargo.toml
[INFO] started frobbing cassava/aoc17.rs
[INFO] finished frobbing cassava/aoc17.rs
[INFO] frobbed toml for cassava/aoc17.rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cassava/aoc17.rs/Cargo.toml
[INFO] crate cassava/aoc17.rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing cassava/aoc17.rs against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cassava/aoc17.rs:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 2d9330a84b458722bd4f3e92befab3baa4a1bb4cfb9633e8c041913d58d89137
[INFO] running `"docker" "start" "-a" "2d9330a84b458722bd4f3e92befab3baa4a1bb4cfb9633e8c041913d58d89137"`
[INFO] [stderr]    Compiling clap v2.28.0
[INFO] [stderr]    Compiling regex v0.2.3
[INFO] [stderr]    Compiling aoc v0.16.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `val` is never read
[INFO] [stderr]    --> src/bin/17_vortex.rs:105:13
[INFO] [stderr]     |
[INFO] [stderr] 105 |     let mut val = if watch == 0 { Some(0) } else { None };
[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: value assigned to `val` is never read
[INFO] [stderr]    --> src/bin/17_vortex.rs:133:13
[INFO] [stderr]     |
[INFO] [stderr] 133 |             val = Some(i);
[INFO] [stderr]     |             ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] error[E0601]: `main` function not found in crate `18_duet`
[INFO] [stderr]   |
[INFO] [stderr]   = note: consider adding a `main` function to `src/bin/18_duet.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: Could not compile `aoc`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "2d9330a84b458722bd4f3e92befab3baa4a1bb4cfb9633e8c041913d58d89137"`
[INFO] running `"docker" "rm" "-f" "2d9330a84b458722bd4f3e92befab3baa4a1bb4cfb9633e8c041913d58d89137"`
[INFO] [stdout] 2d9330a84b458722bd4f3e92befab3baa4a1bb4cfb9633e8c041913d58d89137