[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] checking keitaroskmt/matroid_bandits against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeitaroskmt%2Fmatroid_bandits" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/keitaroskmt/matroid_bandits on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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-5/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: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_distr v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff73b26b328bbfcfde332b0db2d6d686fe475bb4778825845dc7b3d411156b81
[INFO] running `Command { std: "docker" "start" "-a" "ff73b26b328bbfcfde332b0db2d6d686fe475bb4778825845dc7b3d411156b81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff73b26b328bbfcfde332b0db2d6d686fe475bb4778825845dc7b3d411156b81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff73b26b328bbfcfde332b0db2d6d686fe475bb4778825845dc7b3d411156b81", kill_on_drop: false }`
[INFO] [stdout] ff73b26b328bbfcfde332b0db2d6d686fe475bb4778825845dc7b3d411156b81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] db4e0481caeb6a248ec28bc87dcaac265f93c6c665ddd52df1ca2de50bb07d3c
[INFO] running `Command { std: "docker" "start" "-a" "db4e0481caeb6a248ec28bc87dcaac265f93c6c665ddd52df1ca2de50bb07d3c", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking rand_distr v0.4.0
[INFO] [stderr]     Checking matroid_bandits v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/solver.rs (1 fix)
[INFO] [stderr]        Fixed src/main.rs (1 fix)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Normal`
[INFO] [stdout]    --> src/main.rs:156:22
[INFO] [stdout]     |
[INFO] [stdout] 156 |         let normal = Normal::new(2.0, 3.0).unwrap();
[INFO] [stdout]     |                      ^^^^^^ not found in this scope
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 153 |     use crate::solver::Normal;
[INFO] [stdout]     |
[INFO] [stdout] 153 |     use rand_distr::Normal;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]   --> src/graph.rs:51:12
[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 is never used: `kruskal`
[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: associated function is never used: `cost_diff`
[INFO] [stdout]   --> src/solver.rs:68:12
[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: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `matroid_bandits` due to 2 previous errors
[INFO] [stderr] error: failed to migrate to next edition
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `cargo fix --edition --allow-no-vcs --allow-dirty --frozen --all --all-targets --message-format=json` (exit status: 101)
[INFO] running `Command { std: "docker" "inspect" "db4e0481caeb6a248ec28bc87dcaac265f93c6c665ddd52df1ca2de50bb07d3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db4e0481caeb6a248ec28bc87dcaac265f93c6c665ddd52df1ca2de50bb07d3c", kill_on_drop: false }`
[INFO] [stdout] db4e0481caeb6a248ec28bc87dcaac265f93c6c665ddd52df1ca2de50bb07d3c