[INFO] updating cached repository binshengliu/rforests
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/binshengliu/rforests
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/binshengliu/rforests" "work/ex/beta-1.38-1/sources/1.37.0/gh/binshengliu/rforests"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/binshengliu/rforests'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/binshengliu/rforests" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/binshengliu/rforests"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/binshengliu/rforests'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 40a73e30640d99db67db94435f2361758a7ea949
[INFO] sha for GitHub repo binshengliu/rforests: 40a73e30640d99db67db94435f2361758a7ea949
[INFO] validating manifest of binshengliu/rforests 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 binshengliu/rforests 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 binshengliu/rforests
[INFO] finished frobbing binshengliu/rforests
[INFO] frobbed toml for binshengliu/rforests written to work/ex/beta-1.38-1/sources/1.37.0/gh/binshengliu/rforests/Cargo.toml
[INFO] started frobbing binshengliu/rforests
[INFO] finished frobbing binshengliu/rforests
[INFO] frobbed toml for binshengliu/rforests written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/binshengliu/rforests/Cargo.toml
[INFO] crate binshengliu/rforests 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 binshengliu/rforests 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/binshengliu/rforests:/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] 3e84e75d582d724adc1656599eb0820cd82cb6654cf615e5da24ce327754c807
[INFO] running `"docker" "start" "-a" "3e84e75d582d724adc1656599eb0820cd82cb6654cf615e5da24ce327754c807"`
[INFO] [stderr]    Compiling clap v2.27.0
[INFO] [stderr]    Compiling env_logger v0.4.3
[INFO] [stderr]    Compiling rforests v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(ord_max_min)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(unboxed_closures)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/util.rs:1:51
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub type Result<T> = ::std::result::Result<T, Box<::std::error::Error>>;
[INFO] [stderr]   |                                                   ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::error::Error)`
[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/metric/mod.rs:18:48
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub fn new(name: &str, k: usize) -> Option<Box<Measure>> {
[INFO] [stderr]    |                                                ^^^^^^^ help: use `dyn`: `dyn Measure`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/train/dataset.rs:326:22
[INFO] [stderr]     |
[INFO] [stderr] 326 |         metric: &Box<Measure>,
[INFO] [stderr]     |                      ^^^^^^^ help: use `dyn`: `dyn Measure`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/train/validate_set.rs:24:40
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn measure(&self, metric: &Box<Measure>) -> f64 {
[INFO] [stderr]    |                                        ^^^^^^^ help: use `dyn`: `dyn Measure`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/train/lambdamart/training_set.rs:174:18
[INFO] [stderr]     |
[INFO] [stderr] 174 |     metric: &Box<Measure>,
[INFO] [stderr]     |                  ^^^^^^^ help: use `dyn`: `dyn Measure`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/train/lambdamart/training_set.rs:351:70
[INFO] [stderr]     |
[INFO] [stderr] 351 |     pub fn update_lambdas_weights<'a, 'b>(&'a mut self, metric: &Box<Measure>) {
[INFO] [stderr]     |                                                                      ^^^^^^^ help: use `dyn`: `dyn Measure`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/train/lambdamart/training_set.rs:392:40
[INFO] [stderr]     |
[INFO] [stderr] 392 |     pub fn measure(&self, metric: &Box<Measure>) -> f64 {
[INFO] [stderr]     |                                        ^^^^^^^ help: use `dyn`: `dyn Measure`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/train/lambdamart/lambdamart.rs:20:21
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub metric: Box<Measure>,
[INFO] [stderr]    |                     ^^^^^^^ help: use `dyn`: `dyn Measure`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `rforests`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3e84e75d582d724adc1656599eb0820cd82cb6654cf615e5da24ce327754c807"`
[INFO] running `"docker" "rm" "-f" "3e84e75d582d724adc1656599eb0820cd82cb6654cf615e5da24ce327754c807"`
[INFO] [stdout] 3e84e75d582d724adc1656599eb0820cd82cb6654cf615e5da24ce327754c807