[INFO] cloning repository https://github.com/keeslinp/decision_tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/keeslinp/decision_tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeeslinp%2Fdecision_tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeeslinp%2Fdecision_tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4b4d8633cf8d7560525c874ade61eb67b1e8e651
[INFO] checking keeslinp/decision_tree against try#901e6d56697c79b2e80df6a487b2318ec6f57ee3 for pr-142287
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeeslinp%2Fdecision_tree" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/keeslinp/decision_tree on toolchain 901e6d56697c79b2e80df6a487b2318ec6f57ee3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/keeslinp/decision_tree
[INFO] finished tweaking git repo https://github.com/keeslinp/decision_tree
[INFO] tweaked toml for git repo https://github.com/keeslinp/decision_tree written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/keeslinp/decision_tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking keeslinp/decision_tree against try#901e6d56697c79b2e80df6a487b2318ec6f57ee3 for pr-142287
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeeslinp%2Fdecision_tree" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/keeslinp/decision_tree on toolchain 901e6d56697c79b2e80df6a487b2318ec6f57ee3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/keeslinp/decision_tree
[INFO] finished tweaking git repo https://github.com/keeslinp/decision_tree
[INFO] tweaked toml for git repo https://github.com/keeslinp/decision_tree written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/keeslinp/decision_tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d9c7c8dee80ed0acff9a02b7614e020ae68ae2c672220908cf0684dd56d02bb3
[INFO] running `Command { std: "docker" "start" "-a" "d9c7c8dee80ed0acff9a02b7614e020ae68ae2c672220908cf0684dd56d02bb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d9c7c8dee80ed0acff9a02b7614e020ae68ae2c672220908cf0684dd56d02bb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9c7c8dee80ed0acff9a02b7614e020ae68ae2c672220908cf0684dd56d02bb3", kill_on_drop: false }`
[INFO] [stdout] d9c7c8dee80ed0acff9a02b7614e020ae68ae2c672220908cf0684dd56d02bb3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 681b7d8fd067d5e3ece8184afee09dddceaff51540e2fb4b158c843169c4ccd3
[INFO] running `Command { std: "docker" "start" "-a" "681b7d8fd067d5e3ece8184afee09dddceaff51540e2fb4b158c843169c4ccd3", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling libc v0.2.49
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]    Compiling regex v1.1.2
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking either v1.5.1
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]     Checking regex-syntax v0.6.5
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.3
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking rand_os v0.1.2
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking decision_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `test_accuracy`
[INFO] [stdout]    --> src/decision.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |             let test_accuracy = self.test_set(training);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_test_accuracy`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test_accuracy`
[INFO] [stdout]    --> src/decision.rs:146:17
[INFO] [stdout]     |
[INFO] [stdout] 146 |             let test_accuracy = self.test_set(training);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_test_accuracy`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `count_pruned_nodes` is never used
[INFO] [stdout]    --> src/decision.rs:288:12
[INFO] [stdout]     |
[INFO] [stdout] 50  | impl DecisionTree {
[INFO] [stdout]     | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 288 |     pub fn count_pruned_nodes(&self) -> usize {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `count_pruned_nodes` is never used
[INFO] [stdout]    --> src/decision.rs:288:12
[INFO] [stdout]     |
[INFO] [stdout] 50  | impl DecisionTree {
[INFO] [stdout]     | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 288 |     pub fn count_pruned_nodes(&self) -> usize {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.69s
[INFO] running `Command { std: "docker" "inspect" "681b7d8fd067d5e3ece8184afee09dddceaff51540e2fb4b158c843169c4ccd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "681b7d8fd067d5e3ece8184afee09dddceaff51540e2fb4b158c843169c4ccd3", kill_on_drop: false }`
[INFO] [stdout] 681b7d8fd067d5e3ece8184afee09dddceaff51540e2fb4b158c843169c4ccd3