[INFO] cloning repository https://github.com/cbr9/neural-net-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cbr9/neural-net-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcbr9%2Fneural-net-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcbr9%2Fneural-net-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 37ab91c68c61cd250cb84485b6977dda3adf2caf
[INFO] testing cbr9/neural-net-rust against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcbr9%2Fneural-net-rust" "/workspace/builds/worker-102/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-102/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cbr9/neural-net-rust on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-102/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 `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f96253d59a79b02f39a660d09ce4f15a9f6ff617bfcbfd2f6bace38033ccb240
[INFO] running `Command { std: "docker" "start" "-a" "f96253d59a79b02f39a660d09ce4f15a9f6ff617bfcbfd2f6bace38033ccb240", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f96253d59a79b02f39a660d09ce4f15a9f6ff617bfcbfd2f6bace38033ccb240", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f96253d59a79b02f39a660d09ce4f15a9f6ff617bfcbfd2f6bace38033ccb240", kill_on_drop: false }`
[INFO] [stdout] f96253d59a79b02f39a660d09ce4f15a9f6ff617bfcbfd2f6bace38033ccb240
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0252c2b6954d5bfb1672257d25cec6caca1da2743807f2b600867300d1a9ee59
[INFO] running `Command { std: "docker" "start" "-a" "0252c2b6954d5bfb1672257d25cec6caca1da2743807f2b600867300d1a9ee59", kill_on_drop: false }`
[INFO] [stderr]    Compiling neuron v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected expression, found `}`
[INFO] [stdout]   --> src/main.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |             self::LossFn::MSE => 
[INFO] [stdout]    |                               -- while parsing the `match` arm starting here
[INFO] [stdout] 49 |         }
[INFO] [stdout]    |         ^ expected expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |            return match self {
[INFO] [stdout]    |  __________^______-
[INFO] [stdout]    | | _________|
[INFO] [stdout]    | ||
[INFO] [stdout] 48 | ||             self::LossFn::MSE => 
[INFO] [stdout] 49 | ||         }
[INFO] [stdout]    | ||         ^
[INFO] [stdout]    | ||_________|
[INFO] [stdout]    | |__________unreachable expression
[INFO] [stdout]    |            any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/main.rs:107:51
[INFO] [stdout]     |
[INFO] [stdout] 107 |     fn mse(y_true: Vec<i32>, y_pred: Vec<i32>) -> f32 {
[INFO] [stdout]     |        ---                                        ^^^ expected `f32`, found `()`
[INFO] [stdout]     |        |
[INFO] [stdout]     |        implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `neuron` due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "0252c2b6954d5bfb1672257d25cec6caca1da2743807f2b600867300d1a9ee59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0252c2b6954d5bfb1672257d25cec6caca1da2743807f2b600867300d1a9ee59", kill_on_drop: false }`
[INFO] [stdout] 0252c2b6954d5bfb1672257d25cec6caca1da2743807f2b600867300d1a9ee59