[INFO] cloning repository keeslinp/decision_tree
[INFO] running `"git" "clone" "--bare" "git://github.com/keeslinp/decision_tree.git" "work/cache/sources/gh/keeslinp/decision_tree"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/keeslinp/decision_tree'...
[INFO] running `"git" "clone" "work/cache/sources/gh/keeslinp/decision_tree" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/keeslinp/decision_tree"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/keeslinp/decision_tree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/keeslinp/decision_tree" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/keeslinp/decision_tree"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/keeslinp/decision_tree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4b4d8633cf8d7560525c874ade61eb67b1e8e651
[INFO] sha for GitHub repo keeslinp/decision_tree: 4b4d8633cf8d7560525c874ade61eb67b1e8e651
[INFO] validating manifest of keeslinp/decision_tree on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of keeslinp/decision_tree on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing keeslinp/decision_tree
[INFO] finished frobbing keeslinp/decision_tree
[INFO] frobbed toml for keeslinp/decision_tree written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/keeslinp/decision_tree/Cargo.toml
[INFO] started frobbing keeslinp/decision_tree
[INFO] finished frobbing keeslinp/decision_tree
[INFO] frobbed toml for keeslinp/decision_tree written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/keeslinp/decision_tree/Cargo.toml
[INFO] crate keeslinp/decision_tree already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking keeslinp/decision_tree against try#8f81d0bf6baf07b92f1246696722485c4ca0b049 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-1/try#8f81d0bf6baf07b92f1246696722485c4ca0b049:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/keeslinp/decision_tree:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 81c55fac9a28b4cf03c64e833205db33ab73227f452b972628df5ee8778aa9be
[INFO] running `"docker" "start" "-a" "81c55fac9a28b4cf03c64e833205db33ab73227f452b972628df5ee8778aa9be"`
[INFO] [stderr]     Checking decision_tree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `test_accuracy`
[INFO] [stderr]    --> src/decision.rs:146:17
[INFO] [stderr]     |
[INFO] [stderr] 146 |             let test_accuracy = self.test_set(training);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_test_accuracy`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `test_accuracy`
[INFO] [stderr]    --> src/decision.rs:146:17
[INFO] [stderr]     |
[INFO] [stderr] 146 |             let test_accuracy = self.test_set(training);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_test_accuracy`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `count_pruned_nodes`
[INFO] [stderr]    --> src/decision.rs:288:5
[INFO] [stderr]     |
[INFO] [stderr] 288 |     pub fn count_pruned_nodes(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `count_pruned_nodes`
[INFO] [stderr]    --> src/decision.rs:288:5
[INFO] [stderr]     |
[INFO] [stderr] 288 |     pub fn count_pruned_nodes(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.34s
[INFO] running `"docker" "inspect" "81c55fac9a28b4cf03c64e833205db33ab73227f452b972628df5ee8778aa9be"`
[INFO] running `"docker" "rm" "-f" "81c55fac9a28b4cf03c64e833205db33ab73227f452b972628df5ee8778aa9be"`
[INFO] [stdout] 81c55fac9a28b4cf03c64e833205db33ab73227f452b972628df5ee8778aa9be