[INFO] updating cached repository https://github.com/et4te/swim
[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] 3bb49e22e1cfe12cd081aeac06ceb883535a92a7
[INFO] testing et4te/swim against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fet4te%2Fswim" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/et4te/swim 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/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-14/source/Cargo.toml
[INFO] crate git repo https://github.com/et4te/swim 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] f89de1ead19fce5f0c9c061be1d8a793188eb55812780288cf46bf2264b3c087
[INFO] running `"docker" "start" "-a" "f89de1ead19fce5f0c9c061be1d8a793188eb55812780288cf46bf2264b3c087"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling tokio-executor v0.1.5 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling crossbeam-utils v0.6.1 (https://github.com/crossbeam-rs/crossbeam#d627067b)
[INFO] [stderr]    Compiling colored v1.6.1
[INFO] [stderr]    Compiling regex-syntax v0.6.3
[INFO] [stderr]    Compiling tokio-io v0.1.10 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling tokio-serde v0.3.0
[INFO] [stderr]    Compiling bincode v1.0.1
[INFO] [stderr]    Compiling syn v0.15.21
[INFO] [stderr]    Compiling crossbeam-epoch v0.6.1 (https://github.com/crossbeam-rs/crossbeam#d627067b)
[INFO] [stderr]    Compiling tokio-threadpool v0.1.8 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling tokio-timer v0.2.7 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling tokio-current-thread v0.1.3 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling crossbeam-deque v0.6.2 (https://github.com/crossbeam-rs/crossbeam#d627067b)
[INFO] [stderr]    Compiling crossbeam-channel v0.3.2 (https://github.com/crossbeam-rs/crossbeam#d627067b)
[INFO] [stderr]    Compiling crossbeam-skiplist v0.0.0 (https://github.com/crossbeam-rs/crossbeam#d627067b)
[INFO] [stderr]    Compiling tokio-reactor v0.1.6 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling tokio-codec v0.1.1 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling tokio-fs v0.1.4 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling tokio-udp v0.1.2 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling tokio-uds v0.2.3 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling tokio-tcp v0.1.2 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling crossbeam v0.5.0 (https://github.com/crossbeam-rs/crossbeam#d627067b)
[INFO] [stderr]    Compiling tokio v0.1.12 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling regex v1.0.6
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling pretty_env_logger v0.2.5
[INFO] [stderr]    Compiling swim v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: field is never read: `indegree`
[INFO] [stderr]  --> src/digraph.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     indegree: Vec<u32>, // indegree[v] = indegree of vertex v
[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/digraph.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn new(v: u32) -> Digraph {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `validate_vertex`
[INFO] [stderr]   --> src/digraph.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn validate_vertex(&self, v: u32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_edge`
[INFO] [stderr]   --> src/digraph.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     pub fn add_edge(&mut self, v: u32, w: u32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `adj`
[INFO] [stderr]   --> src/digraph.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn adj(&self, v: u32) -> Vec<u32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `outdegree`
[INFO] [stderr]   --> src/digraph.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn outdegree(&self, v: u32) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `indegree`
[INFO] [stderr]   --> src/digraph.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn indegree(&self, v: u32) -> u32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reverse`
[INFO] [stderr]   --> src/digraph.rs:70:5
[INFO] [stderr]    |
[INFO] [stderr] 70 |     pub fn reverse(&self) -> Digraph {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `A`
[INFO] [stderr]   --> src/protocol/slush.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | const A: f32 = 0.5;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `K`
[INFO] [stderr]   --> src/protocol/slush.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | const K: usize = 4;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/protocol/slush.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn new(addr: NetAddr) -> Slush {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_col`
[INFO] [stderr]   --> src/protocol/slush.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `send_query`
[INFO] [stderr]   --> src/protocol/slush.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `handle_query`
[INFO] [stderr]   --> src/protocol/slush.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]   --> src/protocol/slush.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     pub fn run(&mut self, tx: &ColourTx, rx: &mut ColourRx, membership: &Membership) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `outcome`
[INFO] [stderr]    --> src/protocol/slush.rs:112:8
[INFO] [stderr]     |
[INFO] [stderr] 112 | pub fn outcome(votes: Vec<Colour>) -> (u32, u32) {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `A`
[INFO] [stderr]   --> src/protocol/snowflake.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | const A: f32 = 0.5;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `B`
[INFO] [stderr]   --> src/protocol/snowflake.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | const B: u32 = 11;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `K`
[INFO] [stderr]   --> src/protocol/snowflake.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | const K: usize = 4;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Snowflake`
[INFO] [stderr]   --> src/protocol/snowflake.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub struct Snowflake {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/protocol/snowflake.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn new(addr: NetAddr) -> Snowflake {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_col`
[INFO] [stderr]   --> src/protocol/snowflake.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_cnt`
[INFO] [stderr]   --> src/protocol/snowflake.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn set_cnt(&mut self, cnt: u32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `send_query`
[INFO] [stderr]   --> src/protocol/snowflake.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `handle_query`
[INFO] [stderr]   --> src/protocol/snowflake.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]   --> src/protocol/snowflake.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     pub fn run(&mut self, tx: &ColourTx, rx: &mut ColourRx, membership: &Membership) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `outcome`
[INFO] [stderr]    --> src/protocol/snowflake.rs:139:8
[INFO] [stderr]     |
[INFO] [stderr] 139 | pub fn outcome(votes: Vec<Colour>) -> (u32, u32) {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/digraph.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |         write!(f, "{:?} vertices, {:?} edges\n", self.v(), self.e());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/digraph.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |             write!(f, "{:?}: ", v);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/digraph.rs:16:17
[INFO] [stderr]    |
[INFO] [stderr] 16 |                 write!(f, "{:?} ", w);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/digraph.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |             write!(f, "\n");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]   --> src/digraph.rs:42:12
[INFO] [stderr]    |
[INFO] [stderr] 42 |         if v < 0 || v >= self.v {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 32 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 07s
[INFO] running `"docker" "inspect" "f89de1ead19fce5f0c9c061be1d8a793188eb55812780288cf46bf2264b3c087"`
[INFO] running `"docker" "rm" "-f" "f89de1ead19fce5f0c9c061be1d8a793188eb55812780288cf46bf2264b3c087"`
[INFO] [stdout] f89de1ead19fce5f0c9c061be1d8a793188eb55812780288cf46bf2264b3c087
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 6a3ec7ec8609aa56d7c94ddc028aff19b1a2effd550f7a3b59a3198ec1b4907e
[INFO] running `"docker" "start" "-a" "6a3ec7ec8609aa56d7c94ddc028aff19b1a2effd550f7a3b59a3198ec1b4907e"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling swim v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: method is never used: `adj`
[INFO] [stderr]   --> src/digraph.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn adj(&self, v: u32) -> Vec<u32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `outdegree`
[INFO] [stderr]   --> src/digraph.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn outdegree(&self, v: u32) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `indegree`
[INFO] [stderr]   --> src/digraph.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn indegree(&self, v: u32) -> u32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reverse`
[INFO] [stderr]   --> src/digraph.rs:70:5
[INFO] [stderr]    |
[INFO] [stderr] 70 |     pub fn reverse(&self) -> Digraph {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `A`
[INFO] [stderr]   --> src/protocol/slush.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | const A: f32 = 0.5;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `K`
[INFO] [stderr]   --> src/protocol/slush.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | const K: usize = 4;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/protocol/slush.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn new(addr: NetAddr) -> Slush {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_col`
[INFO] [stderr]   --> src/protocol/slush.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `send_query`
[INFO] [stderr]   --> src/protocol/slush.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `handle_query`
[INFO] [stderr]   --> src/protocol/slush.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]   --> src/protocol/slush.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     pub fn run(&mut self, tx: &ColourTx, rx: &mut ColourRx, membership: &Membership) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `outcome`
[INFO] [stderr]    --> src/protocol/slush.rs:112:8
[INFO] [stderr]     |
[INFO] [stderr] 112 | pub fn outcome(votes: Vec<Colour>) -> (u32, u32) {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `A`
[INFO] [stderr]   --> src/protocol/snowflake.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | const A: f32 = 0.5;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `B`
[INFO] [stderr]   --> src/protocol/snowflake.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | const B: u32 = 11;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `K`
[INFO] [stderr]   --> src/protocol/snowflake.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | const K: usize = 4;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Snowflake`
[INFO] [stderr]   --> src/protocol/snowflake.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub struct Snowflake {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/protocol/snowflake.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn new(addr: NetAddr) -> Snowflake {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_col`
[INFO] [stderr]   --> src/protocol/snowflake.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_cnt`
[INFO] [stderr]   --> src/protocol/snowflake.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn set_cnt(&mut self, cnt: u32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `send_query`
[INFO] [stderr]   --> src/protocol/snowflake.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `handle_query`
[INFO] [stderr]   --> src/protocol/snowflake.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]   --> src/protocol/snowflake.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     pub fn run(&mut self, tx: &ColourTx, rx: &mut ColourRx, membership: &Membership) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `outcome`
[INFO] [stderr]    --> src/protocol/snowflake.rs:139:8
[INFO] [stderr]     |
[INFO] [stderr] 139 | pub fn outcome(votes: Vec<Colour>) -> (u32, u32) {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/digraph.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |         write!(f, "{:?} vertices, {:?} edges\n", self.v(), self.e());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/digraph.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |             write!(f, "{:?}: ", v);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/digraph.rs:16:17
[INFO] [stderr]    |
[INFO] [stderr] 16 |                 write!(f, "{:?} ", w);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/digraph.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |             write!(f, "\n");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]   --> src/digraph.rs:42:12
[INFO] [stderr]    |
[INFO] [stderr] 42 |         if v < 0 || v >= self.v {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 28 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.96s
[INFO] running `"docker" "inspect" "6a3ec7ec8609aa56d7c94ddc028aff19b1a2effd550f7a3b59a3198ec1b4907e"`
[INFO] running `"docker" "rm" "-f" "6a3ec7ec8609aa56d7c94ddc028aff19b1a2effd550f7a3b59a3198ec1b4907e"`
[INFO] [stdout] 6a3ec7ec8609aa56d7c94ddc028aff19b1a2effd550f7a3b59a3198ec1b4907e
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 588bf9209f30017646441c28a1d91b3f01c841845179b9ad8bd0bfc57d00573f
[INFO] running `"docker" "start" "-a" "588bf9209f30017646441c28a1d91b3f01c841845179b9ad8bd0bfc57d00573f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: method is never used: `adj`
[INFO] [stderr]   --> src/digraph.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn adj(&self, v: u32) -> Vec<u32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `outdegree`
[INFO] [stderr]   --> src/digraph.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn outdegree(&self, v: u32) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `indegree`
[INFO] [stderr]   --> src/digraph.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn indegree(&self, v: u32) -> u32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reverse`
[INFO] [stderr]   --> src/digraph.rs:70:5
[INFO] [stderr]    |
[INFO] [stderr] 70 |     pub fn reverse(&self) -> Digraph {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `A`
[INFO] [stderr]   --> src/protocol/slush.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | const A: f32 = 0.5;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `K`
[INFO] [stderr]   --> src/protocol/slush.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | const K: usize = 4;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/protocol/slush.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn new(addr: NetAddr) -> Slush {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_col`
[INFO] [stderr]   --> src/protocol/slush.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `send_query`
[INFO] [stderr]   --> src/protocol/slush.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `handle_query`
[INFO] [stderr]   --> src/protocol/slush.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]   --> src/protocol/slush.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     pub fn run(&mut self, tx: &ColourTx, rx: &mut ColourRx, membership: &Membership) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `outcome`
[INFO] [stderr]    --> src/protocol/slush.rs:112:8
[INFO] [stderr]     |
[INFO] [stderr] 112 | pub fn outcome(votes: Vec<Colour>) -> (u32, u32) {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `A`
[INFO] [stderr]   --> src/protocol/snowflake.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | const A: f32 = 0.5;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `B`
[INFO] [stderr]   --> src/protocol/snowflake.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | const B: u32 = 11;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `K`
[INFO] [stderr]   --> src/protocol/snowflake.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | const K: usize = 4;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Snowflake`
[INFO] [stderr]   --> src/protocol/snowflake.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub struct Snowflake {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/protocol/snowflake.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn new(addr: NetAddr) -> Snowflake {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_col`
[INFO] [stderr]   --> src/protocol/snowflake.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_cnt`
[INFO] [stderr]   --> src/protocol/snowflake.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn set_cnt(&mut self, cnt: u32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `send_query`
[INFO] [stderr]   --> src/protocol/snowflake.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `handle_query`
[INFO] [stderr]   --> src/protocol/snowflake.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]   --> src/protocol/snowflake.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     pub fn run(&mut self, tx: &ColourTx, rx: &mut ColourRx, membership: &Membership) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `outcome`
[INFO] [stderr]    --> src/protocol/snowflake.rs:139:8
[INFO] [stderr]     |
[INFO] [stderr] 139 | pub fn outcome(votes: Vec<Colour>) -> (u32, u32) {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/digraph.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |         write!(f, "{:?} vertices, {:?} edges\n", self.v(), self.e());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/digraph.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |             write!(f, "{:?}: ", v);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/digraph.rs:16:17
[INFO] [stderr]    |
[INFO] [stderr] 16 |                 write!(f, "{:?} ", w);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/digraph.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |             write!(f, "\n");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]   --> src/digraph.rs:42:12
[INFO] [stderr]    |
[INFO] [stderr] 42 |         if v < 0 || v >= self.v {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 28 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.21s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/swim-a718de175bd145f5
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr] error: test failed, to rerun pass '--bin swim'
[INFO] [stdout] test digraph::tests::test_one ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- digraph::tests::test_one stdout ----
[INFO] [stdout] thread 'digraph::tests::test_one' panicked at 'vertex is not between 0 and v - 1', src/digraph.rs:43:13
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55ac42cfc464 - backtrace::backtrace::libunwind::trace::hc1c4a1d8ad423b97
[INFO] [stdout]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
[INFO] [stdout]    1:     0x55ac42cfc464 - backtrace::backtrace::trace_unsynchronized::h82274781060cb056
[INFO] [stdout]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
[INFO] [stdout]    2:     0x55ac42cfc464 - std::sys_common::backtrace::_print_fmt::h2a45d89b653a4da8
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:78
[INFO] [stdout]    3:     0x55ac42cfc464 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h41a0a93ab85e6aa1
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stdout]    4:     0x55ac42d250ac - core::fmt::write::hdaea18585065a96d
[INFO] [stdout]                                at src/libcore/fmt/mod.rs:1069
[INFO] [stdout]    5:     0x55ac42ca9465 - std::io::Write::write_fmt::h42f0550b6bd39c6e
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/io/mod.rs:1504
[INFO] [stdout]    6:     0x55ac42cf6a51 - std::io::impls::<impl std::io::Write for alloc::boxed::Box<W>>::write_fmt::h223d7b7033cad46d
[INFO] [stdout]                                at src/libstd/io/impls.rs:156
[INFO] [stdout]    7:     0x55ac42cfed35 - std::sys_common::backtrace::_print::hd95f9978cc145ca4
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:62
[INFO] [stdout]    8:     0x55ac42cfed35 - std::sys_common::backtrace::print::hfb25ca2291be47d0
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:49
[INFO] [stdout]    9:     0x55ac42cfed35 - std::panicking::default_hook::{{closure}}::h44f76cee5dc8591c
[INFO] [stdout]                                at src/libstd/panicking.rs:198
[INFO] [stdout]   10:     0x55ac42cfea1b - std::panicking::default_hook::h198e1a712910f1e6
[INFO] [stdout]                                at src/libstd/panicking.rs:215
[INFO] [stdout]   11:     0x55ac42cff392 - std::panicking::rust_panic_with_hook::hc0b4730bb8013f9d
[INFO] [stdout]                                at src/libstd/panicking.rs:511
[INFO] [stdout]   12:     0x55ac42cec7f1 - std::panicking::begin_panic::h37742f83e5bbd7d5
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panicking.rs:438
[INFO] [stdout]   13:     0x55ac42ca6811 - swim::digraph::Digraph::validate_vertex::h4c0cf43bb9bf0af4
[INFO] [stdout]                                at src/digraph.rs:43
[INFO] [stdout]   14:     0x55ac42ca6851 - swim::digraph::Digraph::add_edge::h9c29e97d37c46f5e
[INFO] [stdout]                                at src/digraph.rs:49
[INFO] [stdout]   15:     0x55ac42ca57f8 - swim::digraph::tests::test_one::he48ba7dcb63e463e
[INFO] [stdout]                                at src/digraph.rs:109
[INFO] [stdout]   16:     0x55ac42ca57aa - swim::digraph::tests::test_one::{{closure}}::h08cbe26d07483aac
[INFO] [stdout]                                at src/digraph.rs:107
[INFO] [stdout]   17:     0x55ac42ca592e - core::ops::function::FnOnce::call_once::haf9fd66fca48aa32
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libcore/ops/function.rs:232
[INFO] [stdout]   18:     0x55ac42cd08f6 - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::hc165f65f4331a55c
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/liballoc/boxed.rs:1008
[INFO] [stdout]   19:     0x55ac42cd08f6 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hb89f1f769cad07ce
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panic.rs:318
[INFO] [stdout]   20:     0x55ac42cd08f6 - std::panicking::try::do_call::h104f7f3dae5a1b29
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panicking.rs:331
[INFO] [stdout]   21:     0x55ac42cd08f6 - std::panicking::try::h0e20f01361cba753
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panicking.rs:274
[INFO] [stdout]   22:     0x55ac42cd08f6 - std::panic::catch_unwind::h0bd0c84b5f4cd121
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panic.rs:394
[INFO] [stdout]   23:     0x55ac42cd08f6 - test::run_test_in_process::hf34c22adfeb6853d
[INFO] [stdout]                                at src/libtest/lib.rs:541
[INFO] [stdout]   24:     0x55ac42cd08f6 - test::run_test::run_test_inner::{{closure}}::h40d568b4c10a12f1
[INFO] [stdout]                                at src/libtest/lib.rs:450
[INFO] [stdout]   25:     0x55ac42ca8916 - std::sys_common::backtrace::__rust_begin_short_backtrace::hffd9774ad3f2d778
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/sys_common/backtrace.rs:130
[INFO] [stdout]   26:     0x55ac42cadca5 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h4594020476cf52d4
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/thread/mod.rs:475
[INFO] [stdout]   27:     0x55ac42cadca5 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9d0a6d45b73e29e4
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panic.rs:318
[INFO] [stdout]   28:     0x55ac42cadca5 - std::panicking::try::do_call::h902fd77b30bb3bb7
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panicking.rs:331
[INFO] [stdout]   29:     0x55ac42cadca5 - std::panicking::try::hc17d3a628e65d49d
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panicking.rs:274
[INFO] [stdout]   30:     0x55ac42cadca5 - std::panic::catch_unwind::h9c9d49cbb6b18017
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/panic.rs:394
[INFO] [stdout]   31:     0x55ac42cadca5 - std::thread::Builder::spawn_unchecked::{{closure}}::h6a6f5a333fd631a2
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libstd/thread/mod.rs:474
[INFO] [stdout]   32:     0x55ac42cadca5 - core::ops::function::FnOnce::call_once{{vtable.shim}}::ha6fb197e0ce57f73
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/libcore/ops/function.rs:232
[INFO] [stdout]   33:     0x55ac42d05b7a - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h1f1fac7de7dd9691
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/liballoc/boxed.rs:1008
[INFO] [stdout]   34:     0x55ac42d05b7a - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::ha031f48633a6af54
[INFO] [stdout]                                at /rustc/49cae55760da0a43428eba73abcb659bb70cf2e4/src/liballoc/boxed.rs:1008
[INFO] [stdout]   35:     0x55ac42d05b7a - std::sys::unix::thread::Thread::new::thread_start::h241864caf436e182
[INFO] [stdout]                                at src/libstd/sys/unix/thread.rs:87
[INFO] [stdout]   36:     0x7fd7f269f609 - start_thread
[INFO] [stdout]   37:     0x7fd7f25ab103 - __clone
[INFO] [stdout]   38:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     digraph::tests::test_one
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "588bf9209f30017646441c28a1d91b3f01c841845179b9ad8bd0bfc57d00573f"`
[INFO] running `"docker" "rm" "-f" "588bf9209f30017646441c28a1d91b3f01c841845179b9ad8bd0bfc57d00573f"`
[INFO] [stdout] 588bf9209f30017646441c28a1d91b3f01c841845179b9ad8bd0bfc57d00573f