[INFO] updating cached repository https://github.com/RedPenguin101/Notes_Princeton_Algorithms
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 43bcc476e1399a7c9e3773bb90f43840d7f054a0
[INFO] checking RedPenguin101/Notes_Princeton_Algorithms against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRedPenguin101%2FNotes_Princeton_Algorithms" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RedPenguin101/Notes_Princeton_Algorithms on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/RedPenguin101/Notes_Princeton_Algorithms
[INFO] finished tweaking git repo https://github.com/RedPenguin101/Notes_Princeton_Algorithms
[INFO] tweaked toml for git repo https://github.com/RedPenguin101/Notes_Princeton_Algorithms written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/RedPenguin101/Notes_Princeton_Algorithms already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a11134cb66ba9d2c8a5e3a3a79e9432cf90d18c1519f7da94a1f444d5da7c6ad
[INFO] running `"docker" "start" "-a" "a11134cb66ba9d2c8a5e3a3a79e9432cf90d18c1519f7da94a1f444d5da7c6ad"`
[INFO] [stderr]     Checking algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: struct is never constructed: `QuickFind`
[INFO] [stderr]  --> src/union_find.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct QuickFind(Vec<u32>);
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/union_find.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn new(n: u32) -> QuickFind {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_connected`
[INFO] [stderr]   --> src/union_find.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn is_connected(&self, p: usize, q: usize) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `connect`
[INFO] [stderr]   --> src/union_find.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn connect(&mut self, p: usize, q: usize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `number_of_groups`
[INFO] [stderr]   --> src/union_find.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn number_of_groups(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `QuickUnion`
[INFO] [stderr]    --> src/union_find.rs:133:8
[INFO] [stderr]     |
[INFO] [stderr] 133 | struct QuickUnion(Vec<usize>);
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/union_find.rs:136:5
[INFO] [stderr]     |
[INFO] [stderr] 136 |     fn new(n: usize) -> QuickUnion {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_connected`
[INFO] [stderr]    --> src/union_find.rs:140:5
[INFO] [stderr]     |
[INFO] [stderr] 140 |     fn is_connected(&self, p: usize, q: usize) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `connect`
[INFO] [stderr]    --> src/union_find.rs:144:5
[INFO] [stderr]     |
[INFO] [stderr] 144 |     fn connect(&mut self, p: usize, q: usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_top_of_tree`
[INFO] [stderr]    --> src/union_find.rs:149:5
[INFO] [stderr]     |
[INFO] [stderr] 149 |     fn find_top_of_tree(&self, p: usize) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `number_of_groups`
[INFO] [stderr]    --> src/union_find.rs:157:5
[INFO] [stderr]     |
[INFO] [stderr] 157 |     fn number_of_groups(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `WeightedQuickUnion`
[INFO] [stderr]    --> src/union_find.rs:264:12
[INFO] [stderr]     |
[INFO] [stderr] 264 | pub struct WeightedQuickUnion{
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/union_find.rs:270:5
[INFO] [stderr]     |
[INFO] [stderr] 270 |     pub fn new(n: usize) -> WeightedQuickUnion {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_top_of_tree`
[INFO] [stderr]    --> src/union_find.rs:277:5
[INFO] [stderr]     |
[INFO] [stderr] 277 |     fn find_top_of_tree(&mut self, p: usize) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_connected`
[INFO] [stderr]    --> src/union_find.rs:288:5
[INFO] [stderr]     |
[INFO] [stderr] 288 |     pub fn is_connected(&mut self, p: usize, q: usize) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `connect`
[INFO] [stderr]    --> src/union_find.rs:292:5
[INFO] [stderr]     |
[INFO] [stderr] 292 |     pub fn connect(&mut self, p: usize, q: usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `number_of_groups`
[INFO] [stderr]    --> src/union_find.rs:319:5
[INFO] [stderr]     |
[INFO] [stderr] 319 |     fn number_of_groups(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Grid`
[INFO] [stderr]  --> src/percolation.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Grid {
[INFO] [stderr]   |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/percolation.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn new(n: usize) -> Grid {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unblock_box`
[INFO] [stderr]   --> src/percolation.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn unblock_box(&mut self, row: usize, column: usize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `connect`
[INFO] [stderr]   --> src/percolation.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn connect(&mut self, node: usize, partner: usize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `box_to_array_position`
[INFO] [stderr]   --> src/percolation.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn box_to_array_position(&self, row: usize, column: usize) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `percolates`
[INFO] [stderr]   --> src/percolation.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn percolates(&mut self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/union_find.rs:94:13
[INFO] [stderr]    |
[INFO] [stderr] 94 |         let mut qf = QuickFind::new(3);
[INFO] [stderr]    |             ----^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/union_find.rs:213:13
[INFO] [stderr]     |
[INFO] [stderr] 213 |         let mut qf = QuickUnion::new(3);
[INFO] [stderr]     |             ----^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `number_of_groups`
[INFO] [stderr]    --> src/union_find.rs:157:5
[INFO] [stderr]     |
[INFO] [stderr] 157 |     fn number_of_groups(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `can_count_unconnected_groups`
[INFO] [stderr]    --> src/union_find.rs:212:8
[INFO] [stderr]     |
[INFO] [stderr] 212 |     fn can_count_unconnected_groups() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `can_count_connected_groups`
[INFO] [stderr]    --> src/union_find.rs:218:8
[INFO] [stderr]     |
[INFO] [stderr] 218 |     fn can_count_connected_groups() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `number_of_groups`
[INFO] [stderr]    --> src/union_find.rs:319:5
[INFO] [stderr]     |
[INFO] [stderr] 319 |     fn number_of_groups(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: module `TestQuickFind` should have a snake case name
[INFO] [stderr]   --> src/union_find.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 | mod TestQuickFind {
[INFO] [stderr]    |     ^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_quick_find`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: module `TestQuickUnion` should have a snake case name
[INFO] [stderr]    --> src/union_find.rs:163:5
[INFO] [stderr]     |
[INFO] [stderr] 163 | mod TestQuickUnion {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_quick_union`
[INFO] [stderr] 
[INFO] [stderr] warning: module `TestWeightedQuickUnion` should have a snake case name
[INFO] [stderr]    --> src/union_find.rs:325:5
[INFO] [stderr]     |
[INFO] [stderr] 325 | mod TestWeightedQuickUnion {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_weighted_quick_union`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.96s
[INFO] running `"docker" "inspect" "a11134cb66ba9d2c8a5e3a3a79e9432cf90d18c1519f7da94a1f444d5da7c6ad"`
[INFO] running `"docker" "rm" "-f" "a11134cb66ba9d2c8a5e3a3a79e9432cf90d18c1519f7da94a1f444d5da7c6ad"`
[INFO] [stdout] a11134cb66ba9d2c8a5e3a3a79e9432cf90d18c1519f7da94a1f444d5da7c6ad