[INFO] updating cached repository https://github.com/binshengliu/rforests
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 40a73e30640d99db67db94435f2361758a7ea949
[INFO] checking binshengliu/rforests against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinshengliu%2Frforests" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/binshengliu/rforests on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/binshengliu/rforests
[INFO] finished tweaking git repo https://github.com/binshengliu/rforests
[INFO] tweaked toml for git repo https://github.com/binshengliu/rforests written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/binshengliu/rforests already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5f92b733f0a95a4e5e42a2fc24d0dd420e6cb67c6682a3f3ade989d276cff6d6
[INFO] running `"docker" "start" "-a" "5f92b733f0a95a4e5e42a2fc24d0dd420e6cb67c6682a3f3ade989d276cff6d6"`
[INFO] [stderr]     Checking libc v0.2.32
[INFO] [stderr]     Checking regex-syntax v0.4.1
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking bitflags v0.9.1
[INFO] [stderr]     Checking thread_local v0.3.4
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking atty v0.2.3
[INFO] [stderr]     Checking num_cpus v1.7.0
[INFO] [stderr]     Checking clap v2.27.0
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking rforests v0.1.0 (/opt/rustwide/workdir)
[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] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/util.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | / lazy_static! {
[INFO] [stderr] 13 | |     pub static ref POOL: Mutex<Pool> = Mutex::new(Pool::new(num_cpus::get() as u32));
[INFO] [stderr] 14 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[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: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/util.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | / lazy_static! {
[INFO] [stderr] 13 | |     pub static ref POOL: Mutex<Pool> = Mutex::new(Pool::new(num_cpus::get() as u32));
[INFO] [stderr] 14 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[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] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]  --> src/metric/ndcg.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / lazy_static! {
[INFO] [stderr] 5 | |     static ref DISCOUNT: Vec<f64> = (0..128).map(|i| 1.0 / (i as f64 + 2.0).log2()).collect();
[INFO] [stderr] 6 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]  --> src/metric/ndcg.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / lazy_static! {
[INFO] [stderr] 5 | |     static ref DISCOUNT: Vec<f64> = (0..128).map(|i| 1.0 / (i as f64 + 2.0).log2()).collect();
[INFO] [stderr] 6 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/util.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | / lazy_static! {
[INFO] [stderr] 13 | |     pub static ref POOL: Mutex<Pool> = Mutex::new(Pool::new(num_cpus::get() as u32));
[INFO] [stderr] 14 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]   --> src/util.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | / lazy_static! {
[INFO] [stderr] 13 | |     pub static ref POOL: Mutex<Pool> = Mutex::new(Pool::new(num_cpus::get() as u32));
[INFO] [stderr] 14 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]  --> src/metric/ndcg.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / lazy_static! {
[INFO] [stderr] 5 | |     static ref DISCOUNT: Vec<f64> = (0..128).map(|i| 1.0 / (i as f64 + 2.0).log2()).collect();
[INFO] [stderr] 6 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred
[INFO] [stderr]  --> src/metric/ndcg.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / lazy_static! {
[INFO] [stderr] 5 | |     static ref DISCOUNT: Vec<f64> = (0..128).map(|i| 1.0 / (i as f64 + 2.0).log2()).collect();
[INFO] [stderr] 6 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr]   |
[INFO] [stderr]   = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/format/svmlight.rs:217:32
[INFO] [stderr]     |
[INFO] [stderr] 217 |                 .map_err(|e| e.description().into())
[INFO] [stderr]     |                                ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/format/svmlight.rs:217:32
[INFO] [stderr]     |
[INFO] [stderr] 217 |                 .map_err(|e| e.description().into())
[INFO] [stderr]     |                                ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `ord_max_min` has been stable since 1.21.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(ord_max_min)]
[INFO] [stderr]   |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 15 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `ord_max_min` has been stable since 1.21.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(ord_max_min)]
[INFO] [stderr]   |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 15 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.18s
[INFO] running `"docker" "inspect" "5f92b733f0a95a4e5e42a2fc24d0dd420e6cb67c6682a3f3ade989d276cff6d6"`
[INFO] running `"docker" "rm" "-f" "5f92b733f0a95a4e5e42a2fc24d0dd420e6cb67c6682a3f3ade989d276cff6d6"`
[INFO] [stdout] 5f92b733f0a95a4e5e42a2fc24d0dd420e6cb67c6682a3f3ade989d276cff6d6