[INFO] updating cached repository keeslinp/decision_tree
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/keeslinp/decision_tree
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/keeslinp/decision_tree" "work/ex/beta-1.37-6/sources/1.36.0/gh/keeslinp/decision_tree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/keeslinp/decision_tree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/keeslinp/decision_tree" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/keeslinp/decision_tree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of keeslinp/decision_tree on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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/beta-1.37-6/sources/1.36.0/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/beta-1.37-6/sources/beta-2019-07-23/gh/keeslinp/decision_tree/Cargo.toml
[INFO] crate keeslinp/decision_tree already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing keeslinp/decision_tree against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/keeslinp/decision_tree:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 18fcd479db0e98a9ac1b5f21a0490042d3aa4d086e66b9572311c03c37e22c04
[INFO] running `"docker" "start" "-a" "18fcd479db0e98a9ac1b5f21a0490042d3aa4d086e66b9572311c03c37e22c04"`
[INFO] [stderr]    Compiling 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: 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 5.70s
[INFO] running `"docker" "inspect" "18fcd479db0e98a9ac1b5f21a0490042d3aa4d086e66b9572311c03c37e22c04"`
[INFO] running `"docker" "rm" "-f" "18fcd479db0e98a9ac1b5f21a0490042d3aa4d086e66b9572311c03c37e22c04"`
[INFO] [stdout] 18fcd479db0e98a9ac1b5f21a0490042d3aa4d086e66b9572311c03c37e22c04
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/keeslinp/decision_tree:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] ae11d24867ccdf4c08528c55104b2f720b295248bfc094c96383b8de87fbcf93
[INFO] running `"docker" "start" "-a" "ae11d24867ccdf4c08528c55104b2f720b295248bfc094c96383b8de87fbcf93"`
[INFO] [stderr]    Compiling 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: 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 2.16s
[INFO] running `"docker" "inspect" "ae11d24867ccdf4c08528c55104b2f720b295248bfc094c96383b8de87fbcf93"`
[INFO] running `"docker" "rm" "-f" "ae11d24867ccdf4c08528c55104b2f720b295248bfc094c96383b8de87fbcf93"`
[INFO] [stdout] ae11d24867ccdf4c08528c55104b2f720b295248bfc094c96383b8de87fbcf93
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/keeslinp/decision_tree:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 139eb3a98fbdebf1ae245f238ab37702f1589d61ae5324da3c20eb3530b4681c
[INFO] running `"docker" "start" "-a" "139eb3a98fbdebf1ae245f238ab37702f1589d61ae5324da3c20eb3530b4681c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/decision_tree-af3211d4187081bd
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "139eb3a98fbdebf1ae245f238ab37702f1589d61ae5324da3c20eb3530b4681c"`
[INFO] running `"docker" "rm" "-f" "139eb3a98fbdebf1ae245f238ab37702f1589d61ae5324da3c20eb3530b4681c"`
[INFO] [stdout] 139eb3a98fbdebf1ae245f238ab37702f1589d61ae5324da3c20eb3530b4681c