[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] 3bb49e22e1cfe12cd081aeac06ceb883535a92a7
[INFO] testing et4te/swim against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fet4te%2Fswim" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/et4te/swim on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", 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-7/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: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f4964f407a328b1a3e169fee7313450dcdd7acbd1601db92f4d13eba75153ad2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f4964f407a328b1a3e169fee7313450dcdd7acbd1601db92f4d13eba75153ad2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f4964f407a328b1a3e169fee7313450dcdd7acbd1601db92f4d13eba75153ad2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4964f407a328b1a3e169fee7313450dcdd7acbd1601db92f4d13eba75153ad2", kill_on_drop: false }`
[INFO] [stdout] f4964f407a328b1a3e169fee7313450dcdd7acbd1601db92f4d13eba75153ad2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b6d3574ccd84d366230e17fc9cd12b80d45c6f8986b3af0abc5dbb29c9556e9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1b6d3574ccd84d366230e17fc9cd12b80d45c6f8986b3af0abc5dbb29c9556e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling lazycell v1.2.0
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling termcolor v1.0.4
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling crossbeam-utils v0.6.1
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling crossbeam-utils v0.6.1 (https://github.com/crossbeam-rs/crossbeam#d627067b)
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling colored v1.6.1
[INFO] [stderr]    Compiling humantime v1.1.1
[INFO] [stderr]    Compiling regex-syntax v0.6.3
[INFO] [stderr]    Compiling arrayvec v0.4.7
[INFO] [stderr]    Compiling tokio-executor v0.1.5 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]    Compiling lock_api v0.1.4
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling bytes v0.4.10
[INFO] [stderr]    Compiling smallvec v0.6.5
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling tokio-current-thread v0.1.3 (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 clap v2.32.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.6.1 (https://github.com/crossbeam-rs/crossbeam#d627067b)
[INFO] [stderr]    Compiling crossbeam-epoch v0.6.1
[INFO] [stderr]    Compiling syn v0.15.21
[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 crossbeam-deque v0.6.2
[INFO] [stderr]    Compiling crossbeam-deque v0.6.2 (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 aho-corasick v0.6.9
[INFO] [stderr]    Compiling tokio-codec v0.1.1 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling tokio-threadpool v0.1.8 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling tokio-reactor v0.1.6 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling crossbeam-channel v0.3.2 (https://github.com/crossbeam-rs/crossbeam#d627067b)
[INFO] [stderr]    Compiling tokio-fs v0.1.4 (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 tokio-udp v0.1.2 (https://github.com/tokio-rs/tokio#09f2ac85)
[INFO] [stderr]    Compiling regex v1.0.6
[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 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 bincode v1.0.1
[INFO] [stderr]    Compiling swim v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `indegree`
[INFO] [stdout]  --> src/digraph.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     indegree: Vec<u32>, // indegree[v] = indegree of vertex v
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/digraph.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn new(v: u32) -> Digraph {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `validate_vertex`
[INFO] [stdout]   --> src/digraph.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn validate_vertex(&self, v: u32) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_edge`
[INFO] [stdout]   --> src/digraph.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn add_edge(&mut self, v: u32, w: u32) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `adj`
[INFO] [stdout]   --> src/digraph.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn adj(&self, v: u32) -> Vec<u32> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `outdegree`
[INFO] [stdout]   --> src/digraph.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn outdegree(&self, v: u32) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `indegree`
[INFO] [stdout]   --> src/digraph.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn indegree(&self, v: u32) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reverse`
[INFO] [stdout]   --> src/digraph.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 70 |     pub fn reverse(&self) -> Digraph {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `A`
[INFO] [stdout]   --> src/protocol/slush.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | const A: f32 = 0.5;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `K`
[INFO] [stdout]   --> src/protocol/slush.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | const K: usize = 4;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/protocol/slush.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn new(addr: NetAddr) -> Slush {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_col`
[INFO] [stdout]   --> src/protocol/slush.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `send_query`
[INFO] [stdout]   --> src/protocol/slush.rs:50:12
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `handle_query`
[INFO] [stdout]   --> src/protocol/slush.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]   --> src/protocol/slush.rs:75:12
[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 is never used: `outcome`
[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 is never used: `A`
[INFO] [stdout]   --> src/protocol/snowflake.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | const A: f32 = 0.5;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `B`
[INFO] [stdout]   --> src/protocol/snowflake.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | const B: u32 = 11;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `K`
[INFO] [stdout]   --> src/protocol/snowflake.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | const K: usize = 4;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Snowflake`
[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 function is never used: `new`
[INFO] [stdout]   --> src/protocol/snowflake.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn new(addr: NetAddr) -> Snowflake {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_col`
[INFO] [stdout]   --> src/protocol/snowflake.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_cnt`
[INFO] [stdout]   --> src/protocol/snowflake.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn set_cnt(&mut self, cnt: u32) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `send_query`
[INFO] [stdout]   --> src/protocol/snowflake.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `handle_query`
[INFO] [stdout]   --> src/protocol/snowflake.rs:72:12
[INFO] [stdout]    |
[INFO] [stdout] 72 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]   --> src/protocol/snowflake.rs:81:12
[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 is never used: `outcome`
[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: unused `std::result::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: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::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 a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::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 a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::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 a macro (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: 32 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 36s
[INFO] running `Command { std: "docker" "inspect" "1b6d3574ccd84d366230e17fc9cd12b80d45c6f8986b3af0abc5dbb29c9556e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b6d3574ccd84d366230e17fc9cd12b80d45c6f8986b3af0abc5dbb29c9556e9", kill_on_drop: false }`
[INFO] [stdout] 1b6d3574ccd84d366230e17fc9cd12b80d45c6f8986b3af0abc5dbb29c9556e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e1bb517ef38fcc1ef05e4d88263e22bdf8ac214609460a9deb4a5bcec786c40d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e1bb517ef38fcc1ef05e4d88263e22bdf8ac214609460a9deb4a5bcec786c40d", kill_on_drop: false }`
[INFO] [stderr]    Compiling swim v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `adj`
[INFO] [stdout]   --> src/digraph.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn adj(&self, v: u32) -> Vec<u32> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `outdegree`
[INFO] [stdout]   --> src/digraph.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn outdegree(&self, v: u32) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `indegree`
[INFO] [stdout]   --> src/digraph.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn indegree(&self, v: u32) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reverse`
[INFO] [stdout]   --> src/digraph.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 70 |     pub fn reverse(&self) -> Digraph {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `A`
[INFO] [stdout]   --> src/protocol/slush.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | const A: f32 = 0.5;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `K`
[INFO] [stdout]   --> src/protocol/slush.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | const K: usize = 4;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/protocol/slush.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn new(addr: NetAddr) -> Slush {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_col`
[INFO] [stdout]   --> src/protocol/slush.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `send_query`
[INFO] [stdout]   --> src/protocol/slush.rs:50:12
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `handle_query`
[INFO] [stdout]   --> src/protocol/slush.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]   --> src/protocol/slush.rs:75:12
[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 is never used: `outcome`
[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 is never used: `A`
[INFO] [stdout]   --> src/protocol/snowflake.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | const A: f32 = 0.5;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `B`
[INFO] [stdout]   --> src/protocol/snowflake.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | const B: u32 = 11;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `K`
[INFO] [stdout]   --> src/protocol/snowflake.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | const K: usize = 4;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Snowflake`
[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 function is never used: `new`
[INFO] [stdout]   --> src/protocol/snowflake.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn new(addr: NetAddr) -> Snowflake {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_col`
[INFO] [stdout]   --> src/protocol/snowflake.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_cnt`
[INFO] [stdout]   --> src/protocol/snowflake.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn set_cnt(&mut self, cnt: u32) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `send_query`
[INFO] [stdout]   --> src/protocol/snowflake.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `handle_query`
[INFO] [stdout]   --> src/protocol/snowflake.rs:72:12
[INFO] [stdout]    |
[INFO] [stdout] 72 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]   --> src/protocol/snowflake.rs:81:12
[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 is never used: `outcome`
[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: unused `std::result::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: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::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 a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::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 a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::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 a macro (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: 28 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.63s
[INFO] running `Command { std: "docker" "inspect" "e1bb517ef38fcc1ef05e4d88263e22bdf8ac214609460a9deb4a5bcec786c40d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1bb517ef38fcc1ef05e4d88263e22bdf8ac214609460a9deb4a5bcec786c40d", kill_on_drop: false }`
[INFO] [stdout] e1bb517ef38fcc1ef05e4d88263e22bdf8ac214609460a9deb4a5bcec786c40d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2e4d813ca4d8a9719e34b3fd95c9f529af29a8f12a643c695abf2603b2aed43f
[INFO] running `Command { std: "docker" "start" "-a" "2e4d813ca4d8a9719e34b3fd95c9f529af29a8f12a643c695abf2603b2aed43f", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `adj`
[INFO] [stderr]   --> src/digraph.rs:55:12
[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: associated function is never used: `outdegree`
[INFO] [stderr]   --> src/digraph.rs:60:12
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn outdegree(&self, v: u32) -> usize {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `indegree`
[INFO] [stderr]   --> src/digraph.rs:65:12
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn indegree(&self, v: u32) -> u32 {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `reverse`
[INFO] [stderr]   --> src/digraph.rs:70:12
[INFO] [stderr]    |
[INFO] [stderr] 70 |     pub fn reverse(&self) -> Digraph {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant 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 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: associated function is never used: `new`
[INFO] [stderr]   --> src/protocol/slush.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn new(addr: NetAddr) -> Slush {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_col`
[INFO] [stderr]   --> src/protocol/slush.rs:46:12
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `send_query`
[INFO] [stderr]   --> src/protocol/slush.rs:50:12
[INFO] [stderr]    |
[INFO] [stderr] 50 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `handle_query`
[INFO] [stderr]   --> src/protocol/slush.rs:66:12
[INFO] [stderr]    |
[INFO] [stderr] 66 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `run`
[INFO] [stderr]   --> src/protocol/slush.rs:75:12
[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 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 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 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: associated function is never used: `new`
[INFO] [stderr]   --> src/protocol/snowflake.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn new(addr: NetAddr) -> Snowflake {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_col`
[INFO] [stderr]   --> src/protocol/snowflake.rs:48:12
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn set_col(&mut self, col: Colour) {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_cnt`
[INFO] [stderr]   --> src/protocol/snowflake.rs:52:12
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn set_cnt(&mut self, cnt: u32) {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `send_query`
[INFO] [stderr]   --> src/protocol/snowflake.rs:56:12
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn send_query(&self, tx: ColourTx, peer_addr: NetAddr) {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `handle_query`
[INFO] [stderr]   --> src/protocol/snowflake.rs:72:12
[INFO] [stderr]    |
[INFO] [stderr] 72 |     pub fn handle_query(&mut self, tx: ResponseTx, col: Colour) {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `run`
[INFO] [stderr]   --> src/protocol/snowflake.rs:81:12
[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 0.17s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/swim-d9f0cd3179d1f5d9
[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:     0x563f4519a660 - std::backtrace_rs::backtrace::libunwind::trace::h577ea05e9ca4629a
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stdout]    1:     0x563f4519a660 - std::backtrace_rs::backtrace::trace_unsynchronized::h50b9b72b84c7dd56
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stdout]    2:     0x563f4519a660 - std::sys_common::backtrace::_print_fmt::h6541cf9823837fac
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:79
[INFO] [stdout]    3:     0x563f4519a660 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hf64fbff071026df5
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:58
[INFO] [stdout]    4:     0x563f451bd41c - core::fmt::write::h9ddafa4860d8adff
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/fmt/mod.rs:1082
[INFO] [stdout]    5:     0x563f4513b455 - std::io::Write::write_fmt::h50a71e2460ce07da
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/io/mod.rs:1514
[INFO] [stdout]    6:     0x563f451953d1 - std::io::impls::<impl std::io::Write for alloc::boxed::Box<W>>::write_fmt::h9bbd3fed8160d0d2
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/io/impls.rs:176
[INFO] [stdout]    7:     0x563f4519cae0 - std::sys_common::backtrace::_print::ha25f9ff5080d886d
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:61
[INFO] [stdout]    8:     0x563f4519cae0 - std::sys_common::backtrace::print::h213e8aa8dc5405c0
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:48
[INFO] [stdout]    9:     0x563f4519cae0 - std::panicking::default_hook::{{closure}}::h6482fae49ef9d963
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:200
[INFO] [stdout]   10:     0x563f4519c7d6 - std::panicking::default_hook::he30ad7589e0970f9
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:216
[INFO] [stdout]   11:     0x563f4519d143 - std::panicking::rust_panic_with_hook::haa1ed36ada4ffb03
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:569
[INFO] [stdout]   12:     0x563f4517f9ec - std::panicking::begin_panic::{{closure}}::h9c030a5f1c8286bd
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:498
[INFO] [stdout]   13:     0x563f45180289 - std::sys_common::backtrace::__rust_end_short_backtrace::h7ff36c71abced019
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:153
[INFO] [stdout]   14:     0x563f4517f917 - std::panicking::begin_panic::hd73a9256794cf57f
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:497
[INFO] [stdout]   15:     0x563f45138e45 - swim::digraph::Digraph::validate_vertex::hb9ce22c0fb24ac33
[INFO] [stdout]                                at /opt/rustwide/workdir/src/digraph.rs:43
[INFO] [stdout]   16:     0x563f45138e81 - swim::digraph::Digraph::add_edge::h8c40050abde1e854
[INFO] [stdout]                                at /opt/rustwide/workdir/src/digraph.rs:49
[INFO] [stdout]   17:     0x563f4513a088 - swim::digraph::tests::test_one::head8a5b65176cb08
[INFO] [stdout]                                at /opt/rustwide/workdir/src/digraph.rs:109
[INFO] [stdout]   18:     0x563f4513a03a - swim::digraph::tests::test_one::{{closure}}::h3edd710eebc9a726
[INFO] [stdout]                                at /opt/rustwide/workdir/src/digraph.rs:107
[INFO] [stdout]   19:     0x563f451383be - core::ops::function::FnOnce::call_once::hcbb7b18eceb84aa5
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/ops/function.rs:227
[INFO] [stdout]   20:     0x563f45163d33 - core::ops::function::FnOnce::call_once::hd04d57b5cf16f85a
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/ops/function.rs:227
[INFO] [stdout]   21:     0x563f45163d33 - test::__rust_begin_short_backtrace::hd8e9a8c5a2e43388
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/test/src/lib.rs:517
[INFO] [stdout]   22:     0x563f45162203 - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h3c3db8a500c1a19a
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   23:     0x563f45162203 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h043e9ebcbe360c80
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panic.rs:308
[INFO] [stdout]   24:     0x563f45162203 - std::panicking::try::do_call::h47c2fb275506c2e8
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:373
[INFO] [stdout]   25:     0x563f45162203 - std::panicking::try::h569c20f0e99453b4
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:337
[INFO] [stdout]   26:     0x563f45162203 - std::panic::catch_unwind::hb33c6d0f01540d23
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panic.rs:379
[INFO] [stdout]   27:     0x563f45162203 - test::run_test_in_process::hc0ce562d167e51cf
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/test/src/lib.rs:544
[INFO] [stdout]   28:     0x563f45162203 - test::run_test::run_test_inner::{{closure}}::hd3120982fcd71544
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/test/src/lib.rs:450
[INFO] [stdout]   29:     0x563f4513a886 - std::sys_common::backtrace::__rust_begin_short_backtrace::h84f8bc12cc4cdac6
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys_common/backtrace.rs:137
[INFO] [stdout]   30:     0x563f4513fab5 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::hb8b5fa0ba425d4db
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/thread/mod.rs:458
[INFO] [stdout]   31:     0x563f4513fab5 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hc4b84b244cf55f75
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panic.rs:308
[INFO] [stdout]   32:     0x563f4513fab5 - std::panicking::try::do_call::ha31922ad8fa17753
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:373
[INFO] [stdout]   33:     0x563f4513fab5 - std::panicking::try::h38a6da203722ae6e
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:337
[INFO] [stdout]   34:     0x563f4513fab5 - std::panic::catch_unwind::h83afce167c9062b9
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panic.rs:379
[INFO] [stdout]   35:     0x563f4513fab5 - std::thread::Builder::spawn_unchecked::{{closure}}::h160689155590a70c
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/thread/mod.rs:457
[INFO] [stdout]   36:     0x563f4513fab5 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h7dbf17a455132a46
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/ops/function.rs:227
[INFO] [stdout]   37:     0x563f451a38fa - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h670c50864ac2cb92
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   38:     0x563f451a38fa - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h2511952749086d81
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   39:     0x563f451a38fa - std::sys::unix::thread::Thread::new::thread_start::h5ad4ddffe24373a8
[INFO] [stdout]                                at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/sys/unix/thread.rs:87
[INFO] [stdout]   40:     0x7f161873b609 - start_thread
[INFO] [stdout]   41:     0x7f1618647103 - clone
[INFO] [stdout]   42:                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 `Command { std: "docker" "inspect" "2e4d813ca4d8a9719e34b3fd95c9f529af29a8f12a643c695abf2603b2aed43f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e4d813ca4d8a9719e34b3fd95c9f529af29a8f12a643c695abf2603b2aed43f", kill_on_drop: false }`
[INFO] [stdout] 2e4d813ca4d8a9719e34b3fd95c9f529af29a8f12a643c695abf2603b2aed43f
