[INFO] updating cached repository archer884/notes
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/archer884/notes
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/archer884/notes" "work/ex/beta-1.38-1/sources/1.37.0/gh/archer884/notes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/archer884/notes'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/archer884/notes" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/archer884/notes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/archer884/notes'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d34b0927d51104979eb085f09d1893d3a8110df3
[INFO] sha for GitHub repo archer884/notes: d34b0927d51104979eb085f09d1893d3a8110df3
[INFO] validating manifest of archer884/notes 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 archer884/notes 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 archer884/notes
[INFO] finished frobbing archer884/notes
[INFO] frobbed toml for archer884/notes written to work/ex/beta-1.38-1/sources/1.37.0/gh/archer884/notes/Cargo.toml
[INFO] started frobbing archer884/notes
[INFO] finished frobbing archer884/notes
[INFO] frobbed toml for archer884/notes written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/archer884/notes/Cargo.toml
[INFO] crate archer884/notes 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 archer884/notes against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/archer884/notes:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] a55a129d53eae6c33580f08c33782ed4ff3b3c74aba1925d610357bffc4d03fe
[INFO] running `"docker" "start" "-a" "a55a129d53eae6c33580f08c33782ed4ff3b3c74aba1925d610357bffc4d03fe"`
[INFO] [stderr]    Compiling notes v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax, slice_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/colormap.rs:26:40
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn colors<'a>(&'a self) -> Box<Iterator<Item=&u8> + 'a> {
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=&u8> + 'a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/field.rs:10:33
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn coords(&self) -> Box<Iterator<Item=(usize, usize)>> {
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=(usize, usize)>`
[INFO] [stderr] 
[INFO] [stderr] error[E0618]: expected function, found `()`
[INFO] [stderr]   --> src/field.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 |         box() (y..max_y).flat_map(move |y| (x..max_x).map(move |x| (x, y)))
[INFO] [stderr]    |            ^^-----------
[INFO] [stderr]    |            |
[INFO] [stderr]    |            call expression requires function
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0618.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `notes`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a55a129d53eae6c33580f08c33782ed4ff3b3c74aba1925d610357bffc4d03fe"`
[INFO] running `"docker" "rm" "-f" "a55a129d53eae6c33580f08c33782ed4ff3b3c74aba1925d610357bffc4d03fe"`
[INFO] [stdout] a55a129d53eae6c33580f08c33782ed4ff3b3c74aba1925d610357bffc4d03fe