[INFO] updating cached repository https://github.com/minaminao/algo-rs
[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] 02d464686a9039b6fe21a18ab5a616641a622d17
[INFO] testing minaminao/algo-rs against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fminaminao%2Falgo-rs" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/minaminao/algo-rs on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/minaminao/algo-rs
[INFO] finished tweaking git repo https://github.com/minaminao/algo-rs
[INFO] tweaked toml for git repo https://github.com/minaminao/algo-rs written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/minaminao/algo-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=warn" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cdac05668f8f731366f666e032a8c7b3165f4d37e62d99cb926ad35f1ca743a9
[INFO] running `"docker" "start" "-a" "cdac05668f8f731366f666e032a8c7b3165f4d37e62d99cb926ad35f1ca743a9"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling algo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/data_structures/binary_indexed_tree.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(mut n: usize) -> BinaryIndexedTree {
[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/data_structures/binary_indexed_tree.rs:21:23
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn add(&mut self, mut i: usize, x: isize) {
[INFO] [stderr]    |                       ----^
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:28:23
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn sum(&mut self, mut i: usize) -> isize {
[INFO] [stderr]    |                       ----^
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `BinaryIndexedTree`
[INFO] [stderr]  --> src/data_structures/binary_indexed_tree.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct BinaryIndexedTree {
[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/data_structures/binary_indexed_tree.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(mut n: usize) -> BinaryIndexedTree {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn add(&mut self, mut i: usize, x: isize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn sum(&mut self, mut i: usize) -> isize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum2`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn sum2(&mut self, l: usize, r: usize) -> isize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `size`
[INFO] [stderr]  --> src/data_structures/union_find.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     size: usize,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/data_structures/union_find.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn new(n: usize) -> UnionFind {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unite`
[INFO] [stderr]   --> src/data_structures/union_find.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn unite(&mut self, mut x: usize, mut y: usize) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `same`
[INFO] [stderr]   --> src/data_structures/union_find.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn same(&mut self, x: usize, y: usize) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gcd`
[INFO] [stderr]  --> src/number_theory/gcd_lcm.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn gcd(x: u64, y: u64) -> u64 {
[INFO] [stderr]   |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `"docker" "inspect" "cdac05668f8f731366f666e032a8c7b3165f4d37e62d99cb926ad35f1ca743a9"`
[INFO] running `"docker" "rm" "-f" "cdac05668f8f731366f666e032a8c7b3165f4d37e62d99cb926ad35f1ca743a9"`
[INFO] [stdout] cdac05668f8f731366f666e032a8c7b3165f4d37e62d99cb926ad35f1ca743a9
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=warn" "-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" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 01d43385a0b54384dfc897b52b35896d4d993e2fe3d02f0c6724cc83d8ac166f
[INFO] running `"docker" "start" "-a" "01d43385a0b54384dfc897b52b35896d4d993e2fe3d02f0c6724cc83d8ac166f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling algo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/data_structures/binary_indexed_tree.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(mut n: usize) -> BinaryIndexedTree {
[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/data_structures/binary_indexed_tree.rs:21:23
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn add(&mut self, mut i: usize, x: isize) {
[INFO] [stderr]    |                       ----^
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:28:23
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn sum(&mut self, mut i: usize) -> isize {
[INFO] [stderr]    |                       ----^
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `BinaryIndexedTree`
[INFO] [stderr]  --> src/data_structures/binary_indexed_tree.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct BinaryIndexedTree {
[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/data_structures/binary_indexed_tree.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(mut n: usize) -> BinaryIndexedTree {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn add(&mut self, mut i: usize, x: isize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn sum(&mut self, mut i: usize) -> isize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum2`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn sum2(&mut self, l: usize, r: usize) -> isize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `size`
[INFO] [stderr]  --> src/data_structures/union_find.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     size: usize,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/data_structures/union_find.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn new(n: usize) -> UnionFind {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unite`
[INFO] [stderr]   --> src/data_structures/union_find.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn unite(&mut self, mut x: usize, mut y: usize) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `same`
[INFO] [stderr]   --> src/data_structures/union_find.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn same(&mut self, x: usize, y: usize) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gcd`
[INFO] [stderr]  --> src/number_theory/gcd_lcm.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn gcd(x: u64, y: u64) -> u64 {
[INFO] [stderr]   |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/data_structures/binary_indexed_tree.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(mut n: usize) -> BinaryIndexedTree {
[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/data_structures/binary_indexed_tree.rs:21:23
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn add(&mut self, mut i: usize, x: isize) {
[INFO] [stderr]    |                       ----^
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:28:23
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn sum(&mut self, mut i: usize) -> isize {
[INFO] [stderr]    |                       ----^
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `BinaryIndexedTree`
[INFO] [stderr]  --> src/data_structures/binary_indexed_tree.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct BinaryIndexedTree {
[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/data_structures/binary_indexed_tree.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(mut n: usize) -> BinaryIndexedTree {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn add(&mut self, mut i: usize, x: isize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn sum(&mut self, mut i: usize) -> isize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum2`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn sum2(&mut self, l: usize, r: usize) -> isize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `size`
[INFO] [stderr]  --> src/data_structures/union_find.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     size: usize,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/data_structures/union_find.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn new(n: usize) -> UnionFind {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unite`
[INFO] [stderr]   --> src/data_structures/union_find.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn unite(&mut self, mut x: usize, mut y: usize) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `same`
[INFO] [stderr]   --> src/data_structures/union_find.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn same(&mut self, x: usize, y: usize) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "01d43385a0b54384dfc897b52b35896d4d993e2fe3d02f0c6724cc83d8ac166f"`
[INFO] running `"docker" "rm" "-f" "01d43385a0b54384dfc897b52b35896d4d993e2fe3d02f0c6724cc83d8ac166f"`
[INFO] [stdout] 01d43385a0b54384dfc897b52b35896d4d993e2fe3d02f0c6724cc83d8ac166f
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=warn" "-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" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e2780650686096c71036bc839eb6f4fbd6da641736a70a77066db7e01a9038e7
[INFO] running `"docker" "start" "-a" "e2780650686096c71036bc839eb6f4fbd6da641736a70a77066db7e01a9038e7"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/data_structures/binary_indexed_tree.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(mut n: usize) -> BinaryIndexedTree {
[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/data_structures/binary_indexed_tree.rs:21:23
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn add(&mut self, mut i: usize, x: isize) {
[INFO] [stderr]    |                       ----^
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:28:23
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn sum(&mut self, mut i: usize) -> isize {
[INFO] [stderr]    |                       ----^
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `BinaryIndexedTree`
[INFO] [stderr]  --> src/data_structures/binary_indexed_tree.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct BinaryIndexedTree {
[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/data_structures/binary_indexed_tree.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(mut n: usize) -> BinaryIndexedTree {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn add(&mut self, mut i: usize, x: isize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn sum(&mut self, mut i: usize) -> isize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum2`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn sum2(&mut self, l: usize, r: usize) -> isize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `size`
[INFO] [stderr]  --> src/data_structures/union_find.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     size: usize,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/data_structures/union_find.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn new(n: usize) -> UnionFind {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unite`
[INFO] [stderr]   --> src/data_structures/union_find.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn unite(&mut self, mut x: usize, mut y: usize) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `same`
[INFO] [stderr]   --> src/data_structures/union_find.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn same(&mut self, x: usize, y: usize) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gcd`
[INFO] [stderr]  --> src/number_theory/gcd_lcm.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn gcd(x: u64, y: u64) -> u64 {
[INFO] [stderr]   |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/data_structures/binary_indexed_tree.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(mut n: usize) -> BinaryIndexedTree {
[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/data_structures/binary_indexed_tree.rs:21:23
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn add(&mut self, mut i: usize, x: isize) {
[INFO] [stderr]    |                       ----^
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:28:23
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn sum(&mut self, mut i: usize) -> isize {
[INFO] [stderr]    |                       ----^
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `BinaryIndexedTree`
[INFO] [stderr]  --> src/data_structures/binary_indexed_tree.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct BinaryIndexedTree {
[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/data_structures/binary_indexed_tree.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new(mut n: usize) -> BinaryIndexedTree {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn add(&mut self, mut i: usize, x: isize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn sum(&mut self, mut i: usize) -> isize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sum2`
[INFO] [stderr]   --> src/data_structures/binary_indexed_tree.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn sum2(&mut self, l: usize, r: usize) -> isize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `size`
[INFO] [stderr]  --> src/data_structures/union_find.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     size: usize,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/data_structures/union_find.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn new(n: usize) -> UnionFind {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unite`
[INFO] [stderr]   --> src/data_structures/union_find.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn unite(&mut self, mut x: usize, mut y: usize) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `same`
[INFO] [stderr]   --> src/data_structures/union_find.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn same(&mut self, x: usize, y: usize) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/algo-9180b1d54e8b2cd3
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test number_theory::gcd_lcm::test ... ok
[INFO] [stderr]    Doc-tests algo
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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" "e2780650686096c71036bc839eb6f4fbd6da641736a70a77066db7e01a9038e7"`
[INFO] running `"docker" "rm" "-f" "e2780650686096c71036bc839eb6f4fbd6da641736a70a77066db7e01a9038e7"`
[INFO] [stdout] e2780650686096c71036bc839eb6f4fbd6da641736a70a77066db7e01a9038e7