[INFO] cloning repository https://github.com/et4te/swim
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/et4te/swim" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fet4te%2Fswim", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fet4te%2Fswim'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d3c9b088fc9bbcd921484a755feddf6b36fa9966
[INFO] checking et4te/swim against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fet4te%2Fswim" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/et4te/swim on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/et4te/swim
[INFO] finished tweaking git repo https://github.com/et4te/swim
[INFO] tweaked toml for git repo https://github.com/et4te/swim written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/et4te/swim 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "a4c9f7b4c02e5f2180282807a04773e63c33ef20af744d3ff57c6e0a33a28b53", kill_on_drop: false }`
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[INFO] [stdout] warning: struct `Digraph` is never constructed
[INFO] [stdout]  --> src/digraph.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Digraph {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/digraph.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Digraph {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 25 |
[INFO] [stdout] 26 |     pub fn new(v: u32) -> Digraph {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn v(&self) -> u32 {
[INFO] [stdout]    |            ^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn e(&self) -> u32 {
[INFO] [stdout]    |            ^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     fn validate_vertex(&self, v: u32) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn add_edge(&mut self, v: u32, w: u32) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub fn adj(&self, v: u32) -> Vec<u32> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub fn outdegree(&self, v: u32) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     pub fn indegree(&self, v: u32) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 70 |     pub fn reverse(&self) -> Digraph {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `A` is never used
[INFO] [stdout]   --> src/protocol/slush.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const A: f32 = 0.5;
[INFO] [stdout]    |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `K` is never used
[INFO] [stdout]   --> src/protocol/slush.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const K: usize = 4;
[INFO] [stdout]    |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Slush` is never constructed
[INFO] [stdout]   --> src/protocol/slush.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Slush {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Slush` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `set_col`, `send_query`, `handle_query`, and `run` are never used
[INFO] [stdout]   --> src/protocol/slush.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Slush {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 24 |
[INFO] [stdout] 25 |     pub fn new(addr: NetAddr) -> Slush {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     pub fn run(&mut self, tx: &ColourTx, rx: &mut ColourRx, membership: &Membership) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `outcome` is never used
[INFO] [stdout]    --> src/protocol/slush.rs:112:8
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub fn outcome(votes: Vec<Colour>) -> (u32, u32) {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `A` is never used
[INFO] [stdout]   --> src/protocol/snowflake.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 | const A: f32 = 0.5;
[INFO] [stdout]    |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `B` is never used
[INFO] [stdout]   --> src/protocol/snowflake.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const B: u32 = 11;
[INFO] [stdout]    |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `K` is never used
[INFO] [stdout]   --> src/protocol/snowflake.rs:14:7
[INFO] [stdout]    |
[INFO] [stdout] 14 | const K: usize = 4;
[INFO] [stdout]    |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Snowflake` is never constructed
[INFO] [stdout]   --> src/protocol/snowflake.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Snowflake {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `set_col`, `set_cnt`, `send_query`, `handle_query`, and `run` are never used
[INFO] [stdout]   --> src/protocol/snowflake.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Snowflake {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 23 |
[INFO] [stdout] 24 |     pub fn new(addr: NetAddr) -> Snowflake {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn set_cnt(&mut self, cnt: u32) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 81 |     pub fn run(&mut self, tx: &ColourTx, rx: &mut ColourRx, membership: &Membership) -> bool {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `outcome` is never used
[INFO] [stdout]    --> src/protocol/snowflake.rs:139:8
[INFO] [stdout]     |
[INFO] [stdout] 139 | pub fn outcome(votes: Vec<Colour>) -> (u32, u32) {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `delay` is never read
[INFO] [stdout]   --> src/swim.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Swim {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 18 |     pub addr: NetAddr,
[INFO] [stdout] 19 |     delay: Option<u64>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Swim` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `adj`, `outdegree`, `indegree`, and `reverse` are never used
[INFO] [stdout]   --> src/digraph.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl Digraph {
[INFO] [stdout]    | ------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub fn adj(&self, v: u32) -> Vec<u32> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub fn outdegree(&self, v: u32) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     pub fn indegree(&self, v: u32) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 70 |     pub fn reverse(&self) -> Digraph {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `A` is never used
[INFO] [stdout]   --> src/protocol/slush.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const A: f32 = 0.5;
[INFO] [stdout]    |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `K` is never used
[INFO] [stdout]   --> src/protocol/slush.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const K: usize = 4;
[INFO] [stdout]    |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Slush` is never constructed
[INFO] [stdout]   --> src/protocol/slush.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Slush {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Slush` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `set_col`, `send_query`, `handle_query`, and `run` are never used
[INFO] [stdout]   --> src/protocol/slush.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Slush {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 24 |
[INFO] [stdout] 25 |     pub fn new(addr: NetAddr) -> Slush {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     pub fn run(&mut self, tx: &ColourTx, rx: &mut ColourRx, membership: &Membership) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `outcome` is never used
[INFO] [stdout]    --> src/protocol/slush.rs:112:8
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub fn outcome(votes: Vec<Colour>) -> (u32, u32) {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `A` is never used
[INFO] [stdout]   --> src/protocol/snowflake.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 | const A: f32 = 0.5;
[INFO] [stdout]    |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `B` is never used
[INFO] [stdout]   --> src/protocol/snowflake.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const B: u32 = 11;
[INFO] [stdout]    |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `K` is never used
[INFO] [stdout]   --> src/protocol/snowflake.rs:14:7
[INFO] [stdout]    |
[INFO] [stdout] 14 | const K: usize = 4;
[INFO] [stdout]    |       ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Snowflake` is never constructed
[INFO] [stdout]   --> src/protocol/snowflake.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Snowflake {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `set_col`, `set_cnt`, `send_query`, `handle_query`, and `run` are never used
[INFO] [stdout]   --> src/protocol/snowflake.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Snowflake {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 23 |
[INFO] [stdout] 24 |     pub fn new(addr: NetAddr) -> Snowflake {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn set_cnt(&mut self, cnt: u32) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 81 |     pub fn run(&mut self, tx: &ColourTx, rx: &mut ColourRx, membership: &Membership) -> bool {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `outcome` is never used
[INFO] [stdout]    --> src/protocol/snowflake.rs:139:8
[INFO] [stdout]     |
[INFO] [stdout] 139 | pub fn outcome(votes: Vec<Colour>) -> (u32, u32) {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `delay` is never read
[INFO] [stdout]   --> src/swim.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Swim {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 18 |     pub addr: NetAddr,
[INFO] [stdout] 19 |     delay: Option<u64>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Swim` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/digraph.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         write!(f, "{:?} vertices, {:?} edges\n", self.v(), self.e());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/digraph.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         write!(f, "{:?} vertices, {:?} edges\n", self.v(), self.e());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/digraph.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |             write!(f, "{:?}: ", v);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/digraph.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |             write!(f, "{:?}: ", v);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/digraph.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |                 write!(f, "{:?} ", w);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/digraph.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |             write!(f, "\n");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/digraph.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |                 write!(f, "{:?} ", w);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/digraph.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |         if v < 0 || v >= self.v {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/digraph.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |             write!(f, "\n");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/digraph.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |         if v < 0 || v >= self.v {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.28s
[INFO] running `Command { std: "docker" "inspect" "3210cf8906571b8fa861a3782a40a2f8cbf698b6a039726b2a20bd9b3f389c2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3210cf8906571b8fa861a3782a40a2f8cbf698b6a039726b2a20bd9b3f389c2e", kill_on_drop: false }`
[INFO] [stdout] 3210cf8906571b8fa861a3782a40a2f8cbf698b6a039726b2a20bd9b3f389c2e