[INFO] updating cached repository sh4869/dirty_material_cleaner
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sh4869/dirty_material_cleaner
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sh4869/dirty_material_cleaner" "work/ex/beta-1.38-1/sources/1.37.0/gh/sh4869/dirty_material_cleaner"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/sh4869/dirty_material_cleaner'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sh4869/dirty_material_cleaner" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sh4869/dirty_material_cleaner"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sh4869/dirty_material_cleaner'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8ad3c434ab8820f9867e94a5d1dac9ef2a448821
[INFO] sha for GitHub repo sh4869/dirty_material_cleaner: 8ad3c434ab8820f9867e94a5d1dac9ef2a448821
[INFO] validating manifest of sh4869/dirty_material_cleaner 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 sh4869/dirty_material_cleaner 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 sh4869/dirty_material_cleaner
[INFO] finished frobbing sh4869/dirty_material_cleaner
[INFO] frobbed toml for sh4869/dirty_material_cleaner written to work/ex/beta-1.38-1/sources/1.37.0/gh/sh4869/dirty_material_cleaner/Cargo.toml
[INFO] started frobbing sh4869/dirty_material_cleaner
[INFO] finished frobbing sh4869/dirty_material_cleaner
[INFO] frobbed toml for sh4869/dirty_material_cleaner written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sh4869/dirty_material_cleaner/Cargo.toml
[INFO] crate sh4869/dirty_material_cleaner 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 sh4869/dirty_material_cleaner against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sh4869/dirty_material_cleaner:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 67a9f62ffcbd1b14ec37ba8b19e231dae032b70a55902ed42e14c31f884c91ea
[INFO] running `"docker" "start" "-a" "67a9f62ffcbd1b14ec37ba8b19e231dae032b70a55902ed42e14c31f884c91ea"`
[INFO] [stderr]    Compiling syn v0.15.21
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling num-derive v0.2.3
[INFO] [stderr]    Compiling tiff v0.2.1
[INFO] [stderr]    Compiling image v0.20.1
[INFO] [stderr]    Compiling drity_material_cleaner v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: expected one of `,`, `@`, or `]`, found `..`
[INFO] [stderr]   --> src/main.rs:17:25
[INFO] [stderr]    |
[INFO] [stderr] 17 |             (&[_, ref at..], &[]) => {
[INFO] [stderr]    |                         ^^ expected one of `,`, `@`, or `]` here
[INFO] [stderr] 
[INFO] [stderr] error: expected one of `,`, `@`, or `]`, found `..`
[INFO] [stderr]   --> src/main.rs:21:37
[INFO] [stderr]    |
[INFO] [stderr] 21 |             (&[ae, ..], &[be, ref bt..]) => {
[INFO] [stderr]    |                                     ^^ expected one of `,`, `@`, or `]` here
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(slice_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:18:21
[INFO] [stderr]    |
[INFO] [stderr] 18 |                 a = at;
[INFO] [stderr]    |                     ^^ expected slice, found type parameter
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&[T]`
[INFO] [stderr]               found type `&T`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:23:21
[INFO] [stderr]    |
[INFO] [stderr] 23 |                 b = bt;
[INFO] [stderr]    |                     ^^ expected slice, found type parameter
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&[U]`
[INFO] [stderr]               found type `&U`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `drity_material_cleaner`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "67a9f62ffcbd1b14ec37ba8b19e231dae032b70a55902ed42e14c31f884c91ea"`
[INFO] running `"docker" "rm" "-f" "67a9f62ffcbd1b14ec37ba8b19e231dae032b70a55902ed42e14c31f884c91ea"`
[INFO] [stdout] 67a9f62ffcbd1b14ec37ba8b19e231dae032b70a55902ed42e14c31f884c91ea