[INFO] cloning repository https://github.com/robn/twister
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/robn/twister" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobn%2Ftwister", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobn%2Ftwister'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d6587a718fe5218b12350e345447c2cf179fb615
[INFO] checking robn/twister against master#4eb62535fc12dd1a63fd43a4173e224e79313c4d for pr-158816
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobn%2Ftwister" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/robn/twister
[INFO] finished tweaking git repo https://github.com/robn/twister
[INFO] tweaked toml for git repo https://github.com/robn/twister written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/robn/twister on toolchain 4eb62535fc12dd1a63fd43a4173e224e79313c4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/robn/twister already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bimap v0.6.0
[INFO] [stderr]   Downloaded hecs v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 570a5ac13a41fec50d2c4c792432ec2a947273d1e7b6b5f479e8141b10cb7667
[INFO] running `Command { std: "docker" "start" "570a5ac13a41fec50d2c4c792432ec2a947273d1e7b6b5f479e8141b10cb7667", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "570a5ac13a41fec50d2c4c792432ec2a947273d1e7b6b5f479e8141b10cb7667", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "570a5ac13a41fec50d2c4c792432ec2a947273d1e7b6b5f479e8141b10cb7667" "/opt/rustwide/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "570a5ac13a41fec50d2c4c792432ec2a947273d1e7b6b5f479e8141b10cb7667", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "570a5ac13a41fec50d2c4c792432ec2a947273d1e7b6b5f479e8141b10cb7667" "/opt/rustwide/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]     Checking ahash v0.4.7
[INFO] [stderr]     Checking bimap v0.6.0
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking hecs v0.3.2
[INFO] [stderr]     Checking mio v0.7.9
[INFO] [stderr]     Checking twister v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `hecs::*`
[INFO] [stdout]  --> src/connection.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use hecs::*;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hecs::*`
[INFO] [stdout]  --> src/connection.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use hecs::*;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `entity`
[INFO] [stdout]    --> src/server.rs:159:35
[INFO] [stdout]     |
[INFO] [stdout] 159 |                   if let Some((_, entity)) = self.token_entity.remove_by_left(&token) {
[INFO] [stdout]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_entity`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]    --> src/server.rs:195:23
[INFO] [stdout]     |
[INFO] [stdout] 195 |   fn apply(&mut self, g: &mut Global, actions: &Vec<Action>) {
[INFO] [stdout]     |                       ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `actions`
[INFO] [stdout]    --> src/server.rs:195:39
[INFO] [stdout]     |
[INFO] [stdout] 195 |   fn apply(&mut self, g: &mut Global, actions: &Vec<Action>) {
[INFO] [stdout]     |                                       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_actions`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/action.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         _ => unimplemented!()
[INFO] [stdout]    |         ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/action.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         Action::SetName(entity, username) => {
[INFO] [stdout]    |         --------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 32 |         Action::Output(entity, text) => {
[INFO] [stdout]    |         ---------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 38 |         Action::Tell(entity, who, text) => {
[INFO] [stdout]    |         ------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 53 |         Action::Hello(entity) => {
[INFO] [stdout]    |         --------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 59 |         _ => unimplemented!()
[INFO] [stdout]    |         ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `entity`
[INFO] [stdout]   --> src/channel.rs:50:33
[INFO] [stdout]    |
[INFO] [stdout] 50 |                     .for_each(|(entity, io)| {
[INFO] [stdout]    |                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_entity`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/channel.rs:34:25
[INFO] [stdout]    |
[INFO] [stdout] 34 |     .for_each(|(entity, c)| {
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Offline` and `Disconnected` are never constructed
[INFO] [stdout]   --> src/component.rs:19:3
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub enum Connection {
[INFO] [stdout]    |          ---------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 19 |   Offline,
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout] 20 |   Disconnected,
[INFO] [stdout]    |   ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Connection` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/component.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Name(pub String);
[INFO] [stdout]    |            ---- ^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `Name` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `members` is never read
[INFO] [stdout]   --> src/component.rs:28:7
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct Channel {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 28 |   pub members: HashSet<Entity>,
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Channel` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ChannelEvent` is never used
[INFO] [stdout]   --> src/component.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub enum ChannelEvent {
[INFO] [stdout]    |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ChannelMessage` is never used
[INFO] [stdout]  --> src/channel.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum ChannelMessage {
[INFO] [stdout]   |      ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `update` is never used
[INFO] [stdout]   --> src/channel.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn update(g: &mut Global) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `apply` is never used
[INFO] [stdout]  --> src/system.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub trait System {
[INFO] [stdout]   |           ------ method in this trait
[INFO] [stdout] 5 |   fn update(&mut self, g: &mut Global) -> Vec<Action>; // XXX remove mut once we're converted
[INFO] [stdout] 6 |   fn apply(&mut self, g: &mut Global, actions: &Vec<Action>);
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `entity`
[INFO] [stdout]    --> src/server.rs:159:35
[INFO] [stdout]     |
[INFO] [stdout] 159 |                   if let Some((_, entity)) = self.token_entity.remove_by_left(&token) {
[INFO] [stdout]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_entity`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]    --> src/server.rs:195:23
[INFO] [stdout]     |
[INFO] [stdout] 195 |   fn apply(&mut self, g: &mut Global, actions: &Vec<Action>) {
[INFO] [stdout]     |                       ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `actions`
[INFO] [stdout]    --> src/server.rs:195:39
[INFO] [stdout]     |
[INFO] [stdout] 195 |   fn apply(&mut self, g: &mut Global, actions: &Vec<Action>) {
[INFO] [stdout]     |                                       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_actions`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/action.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         _ => unimplemented!()
[INFO] [stdout]    |         ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/action.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         Action::SetName(entity, username) => {
[INFO] [stdout]    |         --------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 32 |         Action::Output(entity, text) => {
[INFO] [stdout]    |         ---------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 38 |         Action::Tell(entity, who, text) => {
[INFO] [stdout]    |         ------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 53 |         Action::Hello(entity) => {
[INFO] [stdout]    |         --------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 59 |         _ => unimplemented!()
[INFO] [stdout]    |         ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `entity`
[INFO] [stdout]   --> src/channel.rs:50:33
[INFO] [stdout]    |
[INFO] [stdout] 50 |                     .for_each(|(entity, io)| {
[INFO] [stdout]    |                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_entity`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/channel.rs:34:25
[INFO] [stdout]    |
[INFO] [stdout] 34 |     .for_each(|(entity, c)| {
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Offline` and `Disconnected` are never constructed
[INFO] [stdout]   --> src/component.rs:19:3
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub enum Connection {
[INFO] [stdout]    |          ---------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 19 |   Offline,
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout] 20 |   Disconnected,
[INFO] [stdout]    |   ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Connection` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/component.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Name(pub String);
[INFO] [stdout]    |            ---- ^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `Name` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `members` is never read
[INFO] [stdout]   --> src/component.rs:28:7
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct Channel {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 28 |   pub members: HashSet<Entity>,
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Channel` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ChannelEvent` is never used
[INFO] [stdout]   --> src/component.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub enum ChannelEvent {
[INFO] [stdout]    |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ChannelMessage` is never used
[INFO] [stdout]  --> src/channel.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum ChannelMessage {
[INFO] [stdout]   |      ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `update` is never used
[INFO] [stdout]   --> src/channel.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn update(g: &mut Global) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `apply` is never used
[INFO] [stdout]  --> src/system.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub trait System {
[INFO] [stdout]   |           ------ method in this trait
[INFO] [stdout] 5 |   fn update(&mut self, g: &mut Global) -> Vec<Action>; // XXX remove mut once we're converted
[INFO] [stdout] 6 |   fn apply(&mut self, g: &mut Global, actions: &Vec<Action>);
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.05s
[INFO] running `Command { std: "docker" "inspect" "570a5ac13a41fec50d2c4c792432ec2a947273d1e7b6b5f479e8141b10cb7667", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "570a5ac13a41fec50d2c4c792432ec2a947273d1e7b6b5f479e8141b10cb7667", kill_on_drop: false }`
[INFO] [stdout] 570a5ac13a41fec50d2c4c792432ec2a947273d1e7b6b5f479e8141b10cb7667
