[INFO] updating cached repository https://github.com/peteyycz/learning-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/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] cf656bbc7ed9ae8b8abca06dc4b29fa0263c7eb3
[INFO] testing peteyycz/learning-rust against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeteyycz%2Flearning-rust" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/peteyycz/learning-rust on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/peteyycz/learning-rust
[INFO] finished tweaking git repo https://github.com/peteyycz/learning-rust
[INFO] tweaked toml for git repo https://github.com/peteyycz/learning-rust written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/peteyycz/learning-rust already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /big/crater/work/builds/worker-6/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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-2019-09-28" "build" "--frozen"`
[INFO] [stdout] dfe3eb1b4d573363e6fed59874e04786076eba25757c7165494e29e32a0a0d57
[INFO] running `"docker" "start" "-a" "dfe3eb1b4d573363e6fed59874e04786076eba25757c7165494e29e32a0a0d57"`
[INFO] [stderr]    Compiling snake v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `rand::Rng`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::Rng;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:17:28
[INFO] [stderr]    |
[INFO] [stderr] 17 |         let rand_row: u8 = between.ind_sample(&mut rng);
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected u8, found usize
[INFO] [stderr] help: you can convert an `usize` to `u8` and panic if the converted value wouldn't fit
[INFO] [stderr]    |
[INFO] [stderr] 17 |         let rand_row: u8 = between.ind_sample(&mut rng).try_into().unwrap();
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:18:30
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let rand_value: u8 = between.ind_sample(&mut rng);
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected u8, found usize
[INFO] [stderr] help: you can convert an `usize` to `u8` and panic if the converted value wouldn't fit
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let rand_value: u8 = between.ind_sample(&mut rng).try_into().unwrap();
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:19:28
[INFO] [stderr]    |
[INFO] [stderr] 19 |         let rand_col: u8 = between.ind_sample(&mut rng);
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected u8, found usize
[INFO] [stderr] help: you can convert an `usize` to `u8` and panic if the converted value wouldn't fit
[INFO] [stderr]    |
[INFO] [stderr] 19 |         let rand_col: u8 = between.ind_sample(&mut rng).try_into().unwrap();
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: could not compile `snake`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "dfe3eb1b4d573363e6fed59874e04786076eba25757c7165494e29e32a0a0d57"`
[INFO] running `"docker" "rm" "-f" "dfe3eb1b4d573363e6fed59874e04786076eba25757c7165494e29e32a0a0d57"`
[INFO] [stdout] dfe3eb1b4d573363e6fed59874e04786076eba25757c7165494e29e32a0a0d57