[INFO] updating cached repository spaceships/combustion
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/spaceships/combustion
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/spaceships/combustion" "work/ex/beta-1.38-1/sources/1.37.0/gh/spaceships/combustion"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/spaceships/combustion'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/spaceships/combustion" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/spaceships/combustion"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/spaceships/combustion'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cf314f8490252e0721286415ba97667abddaccdb
[INFO] sha for GitHub repo spaceships/combustion: cf314f8490252e0721286415ba97667abddaccdb
[INFO] validating manifest of spaceships/combustion 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 spaceships/combustion 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 spaceships/combustion
[INFO] finished frobbing spaceships/combustion
[INFO] frobbed toml for spaceships/combustion written to work/ex/beta-1.38-1/sources/1.37.0/gh/spaceships/combustion/Cargo.toml
[INFO] started frobbing spaceships/combustion
[INFO] finished frobbing spaceships/combustion
[INFO] frobbed toml for spaceships/combustion written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/spaceships/combustion/Cargo.toml
[INFO] crate spaceships/combustion 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 spaceships/combustion 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/spaceships/combustion:/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] 5f656577f5a624c82461d10018a4d623b6ea252d4477a12f2440db678c07e003
[INFO] running `"docker" "start" "-a" "5f656577f5a624c82461d10018a4d623b6ea252d4477a12f2440db678c07e003"`
[INFO] [stderr] warning: path `/opt/crater/workdir/src/combustion.rs` was erroneously implicitly accepted for library `combustion`,
[INFO] [stderr] please rename the file to `src/lib.rs` or set lib.path in Cargo.toml
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling combustion v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/board.rs:47:30
[INFO] [stderr]    |
[INFO] [stderr] 47 |     pub fn pieces(&self, f: &Fn(Piece) -> bool) -> Vec<(Pos, Piece)> {
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Piece) -> bool`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/board_from_fen.rs:102:25
[INFO] [stderr]     |
[INFO] [stderr] 102 |                 n @ '1' ... '8' => {
[INFO] [stderr]     |                         ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(ellipsis_inclusive_range_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0282]: type annotations needed
[INFO] [stderr]    --> src/board_from_fen.rs:103:23
[INFO] [stderr]     |
[INFO] [stderr] 103 |                     j += n.to_string().parse().expect("couldn't read number!");
[INFO] [stderr]     |                       ^^ cannot infer type
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0282`.
[INFO] [stderr] error: Could not compile `combustion`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "5f656577f5a624c82461d10018a4d623b6ea252d4477a12f2440db678c07e003"`
[INFO] running `"docker" "rm" "-f" "5f656577f5a624c82461d10018a4d623b6ea252d4477a12f2440db678c07e003"`
[INFO] [stdout] 5f656577f5a624c82461d10018a4d623b6ea252d4477a12f2440db678c07e003