[INFO] crate cryptosphere 0.0.0 is already in cache
[INFO] extracting crate cryptosphere 0.0.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/cryptosphere/0.0.0
[INFO] extracting crate cryptosphere 0.0.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cryptosphere/0.0.0
[INFO] validating manifest of cryptosphere-0.0.0 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 cryptosphere-0.0.0 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 cryptosphere-0.0.0
[INFO] finished frobbing cryptosphere-0.0.0
[INFO] frobbed toml for cryptosphere-0.0.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/cryptosphere/0.0.0/Cargo.toml
[INFO] started frobbing cryptosphere-0.0.0
[INFO] finished frobbing cryptosphere-0.0.0
[INFO] frobbed toml for cryptosphere-0.0.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cryptosphere/0.0.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 cryptosphere-0.0.0 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/cryptosphere/0.0.0:/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] 5bc0ad138a37bd2e3ce34030011fee5888e98b002774870cc80d2204e76c5581
[INFO] running `"docker" "start" "-a" "5bc0ad138a37bd2e3ce34030011fee5888e98b002774870cc80d2204e76c5581"`
[INFO] [stderr] warning: dependency (nickel) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]    Compiling groupable v0.2.0
[INFO] [stderr]    Compiling mustache v0.9.0
[INFO] [stderr]    Compiling nickel v0.11.0
[INFO] [stderr]    Compiling cryptosphere v0.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/main.rs:9:19
[INFO] [stderr]    |
[INFO] [stderr] 9  |     server.get("/", middleware! { |_request, response|
[INFO] [stderr]    |  ___________________^
[INFO] [stderr] 10 | |     return response.send_file(&Path::new("frontend/index.html"))
[INFO] [stderr] 11 | |   });
[INFO] [stderr]    | |___^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unreachable_code)] on by default
[INFO] [stderr]    = note: this warning 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] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:13:3
[INFO] [stderr]    |
[INFO] [stderr] 6  | fn main() {
[INFO] [stderr]    |           - expected `()` because of default return type
[INFO] [stderr] ...
[INFO] [stderr] 13 |   server.listen("127.0.0.1:3000")
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^- help: try adding a semicolon: `;`
[INFO] [stderr]    |   |
[INFO] [stderr]    |   expected (), found enum `std::result::Result`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `()`
[INFO] [stderr]               found type `std::result::Result<nickel::ListeningServer, std::boxed::Box<(dyn std::error::Error + 'static)>>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `cryptosphere`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "5bc0ad138a37bd2e3ce34030011fee5888e98b002774870cc80d2204e76c5581"`
[INFO] running `"docker" "rm" "-f" "5bc0ad138a37bd2e3ce34030011fee5888e98b002774870cc80d2204e76c5581"`
[INFO] [stdout] 5bc0ad138a37bd2e3ce34030011fee5888e98b002774870cc80d2204e76c5581