[INFO] updating cached repository https://github.com/cbr9/neural-net-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 37ab91c68c61cd250cb84485b6977dda3adf2caf
[INFO] testing cbr9/neural-net-rust against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcbr9%2Fneural-net-rust" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cbr9/neural-net-rust on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/cbr9/neural-net-rust
[INFO] finished tweaking git repo https://github.com/cbr9/neural-net-rust
[INFO] tweaked toml for git repo https://github.com/cbr9/neural-net-rust written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/cbr9/neural-net-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b9d48fe393dd11d7dd7eb904a48016b2259e4848a805ce7ac67d1723f0cd2f58
[INFO] running `"docker" "start" "-a" "b9d48fe393dd11d7dd7eb904a48016b2259e4848a805ce7ac67d1723f0cd2f58"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling neuron v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: expected expression, found `}`
[INFO] [stderr]   --> src/main.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |             self::LossFn::MSE => 
[INFO] [stderr]    |                               -- while parsing the `match` arm starting here
[INFO] [stderr] 49 |         }
[INFO] [stderr]    |         ^ expected expression
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/main.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |            return match self {
[INFO] [stderr]    |  __________^______-
[INFO] [stderr]    | | _________|
[INFO] [stderr]    | ||
[INFO] [stderr] 48 | ||             self::LossFn::MSE => 
[INFO] [stderr] 49 | ||         }
[INFO] [stderr]    | ||         ^
[INFO] [stderr]    | ||_________|
[INFO] [stderr]    | |__________unreachable expression
[INFO] [stderr]    |            any code following this expression is unreachable
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/main.rs:107:51
[INFO] [stderr]     |
[INFO] [stderr] 107 |     fn mse(y_true: Vec<i32>, y_pred: Vec<i32>) -> f32 {
[INFO] [stderr]     |        ---                                        ^^^ expected `f32`, found `()`
[INFO] [stderr]     |        |
[INFO] [stderr]     |        implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: could not compile `neuron`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b9d48fe393dd11d7dd7eb904a48016b2259e4848a805ce7ac67d1723f0cd2f58"`
[INFO] running `"docker" "rm" "-f" "b9d48fe393dd11d7dd7eb904a48016b2259e4848a805ce7ac67d1723f0cd2f58"`
[INFO] [stdout] b9d48fe393dd11d7dd7eb904a48016b2259e4848a805ce7ac67d1723f0cd2f58