[INFO] updating cached repository lwassermann/apa102d-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lwassermann/apa102d-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lwassermann/apa102d-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/lwassermann/apa102d-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/lwassermann/apa102d-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lwassermann/apa102d-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lwassermann/apa102d-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lwassermann/apa102d-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b3a96ac3621287861dd6664dce3bda5653ba8322
[INFO] sha for GitHub repo lwassermann/apa102d-rust: b3a96ac3621287861dd6664dce3bda5653ba8322
[INFO] validating manifest of lwassermann/apa102d-rust 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 lwassermann/apa102d-rust 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 lwassermann/apa102d-rust
[INFO] finished frobbing lwassermann/apa102d-rust
[INFO] frobbed toml for lwassermann/apa102d-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/lwassermann/apa102d-rust/Cargo.toml
[INFO] started frobbing lwassermann/apa102d-rust
[INFO] finished frobbing lwassermann/apa102d-rust
[INFO] frobbed toml for lwassermann/apa102d-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lwassermann/apa102d-rust/Cargo.toml
[INFO] crate lwassermann/apa102d-rust 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 lwassermann/apa102d-rust 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-1/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/lwassermann/apa102d-rust:/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] b2a4b2dc6f82253a0bee760a3b444ea9ff2d0f1888a7c70e18a5640aa44ac5cb
[INFO] running `"docker" "start" "-a" "b2a4b2dc6f82253a0bee760a3b444ea9ff2d0f1888a7c70e18a5640aa44ac5cb"`
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling bitflags v0.4.0
[INFO] [stderr]    Compiling libc v0.2.41
[INFO] [stderr]    Compiling cfg-if v0.1.3
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling bitflags v0.3.3
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling nix v0.6.0
[INFO] [stderr]    Compiling spidev v0.3.0
[INFO] [stderr]    Compiling apa102d-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::slice`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::slice;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:57:27
[INFO] [stderr]    |
[INFO] [stderr] 57 |     apa102_sync(&mut spi, &leds);
[INFO] [stderr]    |                           ^^^^^ expected slice, found array of 3 elements
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&[u8]`
[INFO] [stderr]               found type `&[Pixel; 3]`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:67:27
[INFO] [stderr]    |
[INFO] [stderr] 67 |     apa102_sync(&mut spi, &leds);
[INFO] [stderr]    |                           ^^^^^ expected slice, found array of 3 elements
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&[u8]`
[INFO] [stderr]               found type `&[Pixel; 3]`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:72:27
[INFO] [stderr]    |
[INFO] [stderr] 72 |     apa102_sync(&mut spi, &leds);
[INFO] [stderr]    |                           ^^^^^ expected slice, found array of 3 elements
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&[u8]`
[INFO] [stderr]               found type `&[Pixel; 3]`
[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 `apa102d-rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b2a4b2dc6f82253a0bee760a3b444ea9ff2d0f1888a7c70e18a5640aa44ac5cb"`
[INFO] running `"docker" "rm" "-f" "b2a4b2dc6f82253a0bee760a3b444ea9ff2d0f1888a7c70e18a5640aa44ac5cb"`
[INFO] [stdout] b2a4b2dc6f82253a0bee760a3b444ea9ff2d0f1888a7c70e18a5640aa44ac5cb