[INFO] fetching crate xgboost 0.1.4...
[INFO] checking xgboost-0.1.4 against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] extracting crate xgboost 0.1.4 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate xgboost 0.1.4 on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate xgboost 0.1.4
[INFO] finished tweaking crates.io crate xgboost 0.1.4
[INFO] tweaked toml for crates.io crate xgboost 0.1.4 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded xgboost-sys v0.1.2
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "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] 7e25a4420cc850176b4dea68f30049a3a4ac02dca501bb3281a3592b7f9f53ad
[INFO] running `"docker" "start" "-a" "7e25a4420cc850176b4dea68f30049a3a4ac02dca501bb3281a3592b7f9f53ad"`
[INFO] [stderr]    Compiling bindgen v0.36.1
[INFO] [stderr]    Compiling clang-sys v0.22.0
[INFO] [stderr]    Compiling proc-macro2 v0.3.5
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling xgboost-sys v0.1.2
[INFO] [stderr]     Checking xgboost v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/booster.rs:181:29
[INFO] [stderr]     |
[INFO] [stderr] 181 |                         let mut eval_results = dmat_eval_results.entry(eval_name.to_string())
[INFO] [stderr]     |                             ----^^^^^^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/booster.rs:191:29
[INFO] [stderr]     |
[INFO] [stderr] 191 |                         let mut dmat_results = eval_dmat_results.entry(eval_name).or_insert_with(BTreeMap::new);
[INFO] [stderr]     |                             ----^^^^^^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/booster.rs:551:25
[INFO] [stderr]     |
[INFO] [stderr] 551 |                     let mut metric_map = result.entry(evname.to_string()).or_insert_with(IndexMap::new);
[INFO] [stderr]     |                         ----^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/booster.rs:181:29
[INFO] [stderr]     |
[INFO] [stderr] 181 |                         let mut eval_results = dmat_eval_results.entry(eval_name.to_string())
[INFO] [stderr]     |                             ----^^^^^^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/booster.rs:191:29
[INFO] [stderr]     |
[INFO] [stderr] 191 |                         let mut dmat_results = eval_dmat_results.entry(eval_name).or_insert_with(BTreeMap::new);
[INFO] [stderr]     |                             ----^^^^^^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/booster.rs:551:25
[INFO] [stderr]     |
[INFO] [stderr] 551 |                     let mut metric_map = result.entry(evname.to_string()).or_insert_with(IndexMap::new);
[INFO] [stderr]     |                         ----^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/booster.rs:715:13
[INFO] [stderr]     |
[INFO] [stderr] 715 |         let mut dir = tempfile::tempdir().expect("create temp dir");
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4m 36s
[INFO] running `"docker" "inspect" "7e25a4420cc850176b4dea68f30049a3a4ac02dca501bb3281a3592b7f9f53ad"`
[INFO] running `"docker" "rm" "-f" "7e25a4420cc850176b4dea68f30049a3a4ac02dca501bb3281a3592b7f9f53ad"`
[INFO] [stdout] 7e25a4420cc850176b4dea68f30049a3a4ac02dca501bb3281a3592b7f9f53ad