[INFO] crate xgboost 0.1.4 is already in cache
[INFO] extracting crate xgboost 0.1.4 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/xgboost/0.1.4
[INFO] extracting crate xgboost 0.1.4 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/xgboost/0.1.4
[INFO] validating manifest of xgboost-0.1.4 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of xgboost-0.1.4 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing xgboost-0.1.4
[INFO] finished frobbing xgboost-0.1.4
[INFO] frobbed toml for xgboost-0.1.4 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/xgboost/0.1.4/Cargo.toml
[INFO] started frobbing xgboost-0.1.4
[INFO] finished frobbing xgboost-0.1.4
[INFO] frobbed toml for xgboost-0.1.4 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/xgboost/0.1.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking xgboost-0.1.4 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-3/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/xgboost/0.1.4:/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=forbid" "-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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ad8742d3e2783a2af154dc417c7989de34ee8e2e8f6af100e61908f58c03e6be
[INFO] running `"docker" "start" "-a" "ad8742d3e2783a2af154dc417c7989de34ee8e2e8f6af100e61908f58c03e6be"`
[INFO] [stderr]    Compiling xgboost-sys v0.1.2
[INFO] [stderr]     Checking xgboost v0.1.4 (/opt/crater/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 07s
[INFO] running `"docker" "inspect" "ad8742d3e2783a2af154dc417c7989de34ee8e2e8f6af100e61908f58c03e6be"`
[INFO] running `"docker" "rm" "-f" "ad8742d3e2783a2af154dc417c7989de34ee8e2e8f6af100e61908f58c03e6be"`
[INFO] [stdout] ad8742d3e2783a2af154dc417c7989de34ee8e2e8f6af100e61908f58c03e6be