[INFO] cloning repository https://github.com/keitaroskmt/matroid_bandits
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/keitaroskmt/matroid_bandits" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeitaroskmt%2Fmatroid_bandits", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeitaroskmt%2Fmatroid_bandits'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3edb682fdb60f8083c61b650e9ec34bbf7eab762
[INFO] testing keitaroskmt/matroid_bandits against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeitaroskmt%2Fmatroid_bandits" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/keitaroskmt/matroid_bandits on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/keitaroskmt/matroid_bandits
[INFO] finished tweaking git repo https://github.com/keitaroskmt/matroid_bandits
[INFO] tweaked toml for git repo https://github.com/keitaroskmt/matroid_bandits written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/keitaroskmt/matroid_bandits 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" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_distr v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 04870abb87421e120be123260fea93d4849623f8bd75a45a8b5352b0ad7d78ef
[INFO] running `Command { std: "docker" "start" "-a" "04870abb87421e120be123260fea93d4849623f8bd75a45a8b5352b0ad7d78ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "04870abb87421e120be123260fea93d4849623f8bd75a45a8b5352b0ad7d78ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04870abb87421e120be123260fea93d4849623f8bd75a45a8b5352b0ad7d78ef", kill_on_drop: false }`
[INFO] [stdout] 04870abb87421e120be123260fea93d4849623f8bd75a45a8b5352b0ad7d78ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 595d084c33b5fc3ec81579967d5feeb69debc49e310754a607c96b0c26beda65
[INFO] running `Command { std: "docker" "start" "-a" "595d084c33b5fc3ec81579967d5feeb69debc49e310754a607c96b0c26beda65", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling rand_distr v0.4.0
[INFO] [stderr]    Compiling matroid_bandits v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Distribution`, `Normal`
[INFO] [stdout]  --> src/main.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rand_distr::{Normal, Distribution};
[INFO] [stdout]   |                  ^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `error_bound`
[INFO] [stdout]    --> src/solver.rs:169:56
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub fn exact_expgap(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) -> HashSet<usize> {
[INFO] [stdout]     |                                                        ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_error_bound`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `size` is never used
[INFO] [stdout]   --> src/graph.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl UnionFind {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn size(&mut self, x: usize) -> usize {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `kruskal` is never used
[INFO] [stdout]   --> src/graph.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub fn kruskal(n: usize, es: &mut Vec<Edge>) -> f64 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cost_diff` is never used
[INFO] [stdout]   --> src/solver.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 38 | impl Solver {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 68 |     pub fn cost_diff(&self) -> Vec<f64> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]   --> src/main.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stdout]    |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/main.rs:114:13
[INFO] [stdout]     |
[INFO] [stdout] 114 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stdout]     |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]   --> src/solver.rs:95:38
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn uniform_sample(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) {
[INFO] [stdout]    |                                      ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:105:31
[INFO] [stdout]     |
[INFO] [stdout] 105 |     pub fn naive_i(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) -> HashSet<usize> {
[INFO] [stdout]     |                               ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:141:39
[INFO] [stdout]     |
[INFO] [stdout] 141 |     pub fn pac_sampleprune(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) -> HashSet<usize> {
[INFO] [stdout]     |                                       ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `F` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:149:17
[INFO] [stdout]     |
[INFO] [stdout] 149 |         let mut F = HashSet::new();
[INFO] [stdout]     |                 ^ help: convert the identifier to snake case (notice the capitalization): `f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `I` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:158:13
[INFO] [stdout]     |
[INFO] [stdout] 158 |         let I = self.pac_sampleprune(&F, alpha, delta / 8.0);
[INFO] [stdout]     |             ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:169:36
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub fn exact_expgap(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) -> HashSet<usize> {
[INFO] [stdout]     |                                    ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `I` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:192:21
[INFO] [stdout]     |
[INFO] [stdout] 192 |                 let I = self.pac_sampleprune(&s_cur, eps_r, delta_r);
[INFO] [stdout]     |                     ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `U` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:215:25
[INFO] [stdout]     |
[INFO] [stdout] 215 |                 let mut U = HashSet::new();
[INFO] [stdout]     |                         ^ help: convert the identifier to snake case (notice the capitalization): `u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:267:29
[INFO] [stdout]     |
[INFO] [stdout] 267 |     pub fn clucb(&mut self, S: &HashSet<usize>, delta: f64) -> HashSet<usize> {
[INFO] [stdout]     |                             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.94s
[INFO] running `Command { std: "docker" "inspect" "595d084c33b5fc3ec81579967d5feeb69debc49e310754a607c96b0c26beda65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "595d084c33b5fc3ec81579967d5feeb69debc49e310754a607c96b0c26beda65", kill_on_drop: false }`
[INFO] [stdout] 595d084c33b5fc3ec81579967d5feeb69debc49e310754a607c96b0c26beda65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6ccb7c03334b33baebaf76f959caf99eb127711739a995fa7572776a9884bb9c
[INFO] running `Command { std: "docker" "start" "-a" "6ccb7c03334b33baebaf76f959caf99eb127711739a995fa7572776a9884bb9c", kill_on_drop: false }`
[INFO] [stderr]    Compiling matroid_bandits v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `error_bound`
[INFO] [stdout]    --> src/solver.rs:169:56
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub fn exact_expgap(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) -> HashSet<usize> {
[INFO] [stdout]     |                                                        ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_error_bound`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:299:13
[INFO] [stdout]     |
[INFO] [stdout] 299 |         for i in 0..num {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `size` is never used
[INFO] [stdout]   --> src/graph.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl UnionFind {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub fn size(&mut self, x: usize) -> usize {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]   --> src/main.rs:52:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stdout]    |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/main.rs:114:13
[INFO] [stdout]     |
[INFO] [stdout] 114 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stdout]     |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]   --> src/solver.rs:95:38
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn uniform_sample(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) {
[INFO] [stdout]    |                                      ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:105:31
[INFO] [stdout]     |
[INFO] [stdout] 105 |     pub fn naive_i(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) -> HashSet<usize> {
[INFO] [stdout]     |                               ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:141:39
[INFO] [stdout]     |
[INFO] [stdout] 141 |     pub fn pac_sampleprune(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) -> HashSet<usize> {
[INFO] [stdout]     |                                       ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `F` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:149:17
[INFO] [stdout]     |
[INFO] [stdout] 149 |         let mut F = HashSet::new();
[INFO] [stdout]     |                 ^ help: convert the identifier to snake case (notice the capitalization): `f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `I` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:158:13
[INFO] [stdout]     |
[INFO] [stdout] 158 |         let I = self.pac_sampleprune(&F, alpha, delta / 8.0);
[INFO] [stdout]     |             ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:169:36
[INFO] [stdout]     |
[INFO] [stdout] 169 |     pub fn exact_expgap(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) -> HashSet<usize> {
[INFO] [stdout]     |                                    ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `I` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:192:21
[INFO] [stdout]     |
[INFO] [stdout] 192 |                 let I = self.pac_sampleprune(&s_cur, eps_r, delta_r);
[INFO] [stdout]     |                     ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `U` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:215:25
[INFO] [stdout]     |
[INFO] [stdout] 215 |                 let mut U = HashSet::new();
[INFO] [stdout]     |                         ^ help: convert the identifier to snake case (notice the capitalization): `u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/solver.rs:267:29
[INFO] [stdout]     |
[INFO] [stdout] 267 |     pub fn clucb(&mut self, S: &HashSet<usize>, delta: f64) -> HashSet<usize> {
[INFO] [stdout]     |                             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `F` should have a snake case name
[INFO] [stdout]    --> src/main.rs:218:17
[INFO] [stdout]     |
[INFO] [stdout] 218 |         let mut F = Vec::new();
[INFO] [stdout]     |                 ^ help: convert the identifier to snake case (notice the capitalization): `f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/main.rs:291:13
[INFO] [stdout]     |
[INFO] [stdout] 291 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stdout]     |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/main.rs:349:13
[INFO] [stdout]     |
[INFO] [stdout] 349 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stdout]     |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/main.rs:403:13
[INFO] [stdout]     |
[INFO] [stdout] 403 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stdout]     |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `S` should have a snake case name
[INFO] [stdout]    --> src/main.rs:453:13
[INFO] [stdout]     |
[INFO] [stdout] 453 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stdout]     |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "6ccb7c03334b33baebaf76f959caf99eb127711739a995fa7572776a9884bb9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ccb7c03334b33baebaf76f959caf99eb127711739a995fa7572776a9884bb9c", kill_on_drop: false }`
[INFO] [stdout] 6ccb7c03334b33baebaf76f959caf99eb127711739a995fa7572776a9884bb9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c71c16b9f5fa016a97c1fc09c46e6b38e0e1529de48b1a60492984178c802e0f
[INFO] running `Command { std: "docker" "start" "-a" "c71c16b9f5fa016a97c1fc09c46e6b38e0e1529de48b1a60492984178c802e0f", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `error_bound`
[INFO] [stderr]    --> src/solver.rs:169:56
[INFO] [stderr]     |
[INFO] [stderr] 169 |     pub fn exact_expgap(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) -> HashSet<usize> {
[INFO] [stderr]     |                                                        ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_error_bound`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/main.rs:299:13
[INFO] [stderr]     |
[INFO] [stderr] 299 |         for i in 0..num {
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: method `size` is never used
[INFO] [stderr]   --> src/graph.rs:51:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | impl UnionFind {
[INFO] [stderr]    | -------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 51 |     pub fn size(&mut self, x: usize) -> usize {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `S` should have a snake case name
[INFO] [stderr]   --> src/main.rs:52:13
[INFO] [stderr]    |
[INFO] [stderr] 52 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stderr]    |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `S` should have a snake case name
[INFO] [stderr]    --> src/main.rs:114:13
[INFO] [stderr]     |
[INFO] [stderr] 114 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stderr]     |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `S` should have a snake case name
[INFO] [stderr]   --> src/solver.rs:95:38
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn uniform_sample(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) {
[INFO] [stderr]    |                                      ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `S` should have a snake case name
[INFO] [stderr]    --> src/solver.rs:105:31
[INFO] [stderr]     |
[INFO] [stderr] 105 |     pub fn naive_i(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) -> HashSet<usize> {
[INFO] [stderr]     |                               ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `S` should have a snake case name
[INFO] [stderr]    --> src/solver.rs:141:39
[INFO] [stderr]     |
[INFO] [stderr] 141 |     pub fn pac_sampleprune(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) -> HashSet<usize> {
[INFO] [stderr]     |                                       ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `F` should have a snake case name
[INFO] [stderr]    --> src/solver.rs:149:17
[INFO] [stderr]     |
[INFO] [stderr] 149 |         let mut F = HashSet::new();
[INFO] [stderr]     |                 ^ help: convert the identifier to snake case (notice the capitalization): `f`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `I` should have a snake case name
[INFO] [stderr]    --> src/solver.rs:158:13
[INFO] [stderr]     |
[INFO] [stderr] 158 |         let I = self.pac_sampleprune(&F, alpha, delta / 8.0);
[INFO] [stderr]     |             ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `S` should have a snake case name
[INFO] [stderr]    --> src/solver.rs:169:36
[INFO] [stderr]     |
[INFO] [stderr] 169 |     pub fn exact_expgap(&mut self, S: &HashSet<usize>, error_bound: f64, delta: f64) -> HashSet<usize> {
[INFO] [stderr]     |                                    ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `I` should have a snake case name
[INFO] [stderr]    --> src/solver.rs:192:21
[INFO] [stderr]     |
[INFO] [stderr] 192 |                 let I = self.pac_sampleprune(&s_cur, eps_r, delta_r);
[INFO] [stderr]     |                     ^ help: convert the identifier to snake case (notice the capitalization): `i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `U` should have a snake case name
[INFO] [stderr]    --> src/solver.rs:215:25
[INFO] [stderr]     |
[INFO] [stderr] 215 |                 let mut U = HashSet::new();
[INFO] [stderr]     |                         ^ help: convert the identifier to snake case (notice the capitalization): `u`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `S` should have a snake case name
[INFO] [stderr]    --> src/solver.rs:267:29
[INFO] [stderr]     |
[INFO] [stderr] 267 |     pub fn clucb(&mut self, S: &HashSet<usize>, delta: f64) -> HashSet<usize> {
[INFO] [stderr]     |                             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `F` should have a snake case name
[INFO] [stderr]    --> src/main.rs:218:17
[INFO] [stderr]     |
[INFO] [stderr] 218 |         let mut F = Vec::new();
[INFO] [stderr]     |                 ^ help: convert the identifier to snake case (notice the capitalization): `f`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `S` should have a snake case name
[INFO] [stderr]    --> src/main.rs:291:13
[INFO] [stderr]     |
[INFO] [stderr] 291 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stderr]     |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `S` should have a snake case name
[INFO] [stderr]    --> src/main.rs:349:13
[INFO] [stderr]     |
[INFO] [stderr] 349 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stderr]     |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `S` should have a snake case name
[INFO] [stderr]    --> src/main.rs:403:13
[INFO] [stderr]     |
[INFO] [stderr] 403 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stderr]     |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `S` should have a snake case name
[INFO] [stderr]    --> src/main.rs:453:13
[INFO] [stderr]     |
[INFO] [stderr] 453 |         let S = (0..size).collect::<HashSet<usize>>();
[INFO] [stderr]     |             ^ help: convert the identifier to snake case (notice the capitalization): `s`
[INFO] [stderr] 
[INFO] [stderr] warning: `matroid_bandits` (bin "matroid_bandits" test) generated 19 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/matroid_bandits-7fba2d1d7b520429)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test tests::es_sort ... ok
[INFO] [stdout] test tests::normal ... ok
[INFO] [stdout] test tests::test_rank ... ok
[INFO] [stdout] test tests::test_struct ... ok
[INFO] [stdout] test tests::test_sample ... ok
[INFO] [stdout] test tests::test_kruskal ... FAILED
[INFO] [stdout] test tests::test_pac_sampleprune ... ok
[INFO] [stdout] test tests::test_sample_i ... ok
[INFO] [stdout] test tests::test_exact_expgap ... ok
[INFO] [stdout] test tests::test_clucb has been running for over 60 seconds
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "c71c16b9f5fa016a97c1fc09c46e6b38e0e1529de48b1a60492984178c802e0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c71c16b9f5fa016a97c1fc09c46e6b38e0e1529de48b1a60492984178c802e0f", kill_on_drop: false }`
[INFO] [stdout] c71c16b9f5fa016a97c1fc09c46e6b38e0e1529de48b1a60492984178c802e0f
