[INFO] updating cached repository https://github.com/sulabhkothari/SkRustNetworking
[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] 5a62731cd5b147c32b556057f8beed983f439956
[INFO] testing sulabhkothari/SkRustNetworking against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsulabhkothari%2FSkRustNetworking" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sulabhkothari/SkRustNetworking 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/sulabhkothari/SkRustNetworking
[INFO] finished tweaking git repo https://github.com/sulabhkothari/SkRustNetworking
[INFO] tweaked toml for git repo https://github.com/sulabhkothari/SkRustNetworking written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/sulabhkothari/SkRustNetworking already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 8628f4ef6947f584d1a52d167ccd052aaa1bbf410955d169413e7bd8b7fa2b76
[INFO] running `"docker" "start" "-a" "8628f4ef6947f584d1a52d167ccd052aaa1bbf410955d169413e7bd8b7fa2b76"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling futures-sink v0.3.4
[INFO] [stderr]    Compiling arc-swap v0.4.5
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling num_cpus v1.12.0
[INFO] [stderr]    Compiling futures-channel v0.3.4
[INFO] [stderr]    Compiling signal-hook-registry v1.2.0
[INFO] [stderr]    Compiling mio v0.6.21
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling tokio v0.2.17
[INFO] [stderr]    Compiling futures-util v0.3.4
[INFO] [stderr]    Compiling futures-executor v0.3.4
[INFO] [stderr]    Compiling futures v0.3.4
[INFO] [stderr]    Compiling SkRustNetworking v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::thread::Thread`
[INFO] [stderr]  --> src/async_await_basics.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::thread::Thread;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::mpsc`
[INFO] [stderr]  --> src/async_await_basics.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::sync::mpsc;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::join`
[INFO] [stderr]  --> src/async_await_basics.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use futures::join;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `async_await_basics_main`
[INFO] [stderr]   --> src/async_await_basics.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn async_await_basics_main() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Song`
[INFO] [stderr]   --> src/async_await_basics.rs:48:8
[INFO] [stderr]    |
[INFO] [stderr] 48 | struct Song {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/async_await_basics.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn new() -> Song {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `learn_song`
[INFO] [stderr]   --> src/async_await_basics.rs:58:10
[INFO] [stderr]    |
[INFO] [stderr] 58 | async fn learn_song() -> Song {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sing_song`
[INFO] [stderr]   --> src/async_await_basics.rs:66:10
[INFO] [stderr]    |
[INFO] [stderr] 66 | async fn sing_song(song: Song) {
[INFO] [stderr]    |          ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dance`
[INFO] [stderr]   --> src/async_await_basics.rs:72:10
[INFO] [stderr]    |
[INFO] [stderr] 72 | async fn dance() {
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `learn_and_sing`
[INFO] [stderr]   --> src/async_await_basics.rs:76:10
[INFO] [stderr]    |
[INFO] [stderr] 76 | async fn learn_and_sing() {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `async_main`
[INFO] [stderr]   --> src/async_await_basics.rs:81:10
[INFO] [stderr]    |
[INFO] [stderr] 81 | async fn async_main() {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Executor`
[INFO] [stderr]    --> src/async_await_basics.rs:163:8
[INFO] [stderr]     |
[INFO] [stderr] 163 | struct Executor {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `future`
[INFO] [stderr]    --> src/async_await_basics.rs:182:5
[INFO] [stderr]     |
[INFO] [stderr] 182 |     future: Mutex<Option<BoxFuture<'static, ()>>>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `new_executor_and_spawner`
[INFO] [stderr]    --> src/async_await_basics.rs:188:4
[INFO] [stderr]     |
[INFO] [stderr] 188 | fn new_executor_and_spawner() -> (Executor, Spawner) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `spawn`
[INFO] [stderr]    --> src/async_await_basics.rs:198:5
[INFO] [stderr]     |
[INFO] [stderr] 198 |     fn spawn(&self, future: impl Future<Output=()> + 'static + Send) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/async_await_basics.rs:224:5
[INFO] [stderr]     |
[INFO] [stderr] 224 |     fn run(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SkRustNetworking` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sk_rust_networking`
[INFO] [stderr] 
[INFO] [stderr] warning: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::net::TcpStream`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use tokio::net::TcpStream;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::io::AsyncWrite`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use tokio::io::AsyncWrite;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::prelude::*`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use tokio::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::prelude`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use tokio::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SkRustNetworking` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sk_rust_networking`
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 39.57s
[INFO] running `"docker" "inspect" "8628f4ef6947f584d1a52d167ccd052aaa1bbf410955d169413e7bd8b7fa2b76"`
[INFO] running `"docker" "rm" "-f" "8628f4ef6947f584d1a52d167ccd052aaa1bbf410955d169413e7bd8b7fa2b76"`
[INFO] [stdout] 8628f4ef6947f584d1a52d167ccd052aaa1bbf410955d169413e7bd8b7fa2b76
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] ff5a2352d88fca6b1060e1c65e1f1bed84977f2912304e3620c71ec8e2582429
[INFO] running `"docker" "start" "-a" "ff5a2352d88fca6b1060e1c65e1f1bed84977f2912304e3620c71ec8e2582429"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling SkRustNetworking v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::thread::Thread`
[INFO] [stderr]  --> src/async_await_basics.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::thread::Thread;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::mpsc`
[INFO] [stderr]  --> src/async_await_basics.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::sync::mpsc;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::join`
[INFO] [stderr]  --> src/async_await_basics.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use futures::join;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `async_await_basics_main`
[INFO] [stderr]   --> src/async_await_basics.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn async_await_basics_main() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Song`
[INFO] [stderr]   --> src/async_await_basics.rs:48:8
[INFO] [stderr]    |
[INFO] [stderr] 48 | struct Song {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/async_await_basics.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn new() -> Song {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `learn_song`
[INFO] [stderr]   --> src/async_await_basics.rs:58:10
[INFO] [stderr]    |
[INFO] [stderr] 58 | async fn learn_song() -> Song {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sing_song`
[INFO] [stderr]   --> src/async_await_basics.rs:66:10
[INFO] [stderr]    |
[INFO] [stderr] 66 | async fn sing_song(song: Song) {
[INFO] [stderr]    |          ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dance`
[INFO] [stderr]   --> src/async_await_basics.rs:72:10
[INFO] [stderr]    |
[INFO] [stderr] 72 | async fn dance() {
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `learn_and_sing`
[INFO] [stderr]   --> src/async_await_basics.rs:76:10
[INFO] [stderr]    |
[INFO] [stderr] 76 | async fn learn_and_sing() {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `async_main`
[INFO] [stderr]   --> src/async_await_basics.rs:81:10
[INFO] [stderr]    |
[INFO] [stderr] 81 | async fn async_main() {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Executor`
[INFO] [stderr]    --> src/async_await_basics.rs:163:8
[INFO] [stderr]     |
[INFO] [stderr] 163 | struct Executor {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `future`
[INFO] [stderr]    --> src/async_await_basics.rs:182:5
[INFO] [stderr]     |
[INFO] [stderr] 182 |     future: Mutex<Option<BoxFuture<'static, ()>>>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `new_executor_and_spawner`
[INFO] [stderr]    --> src/async_await_basics.rs:188:4
[INFO] [stderr]     |
[INFO] [stderr] 188 | fn new_executor_and_spawner() -> (Executor, Spawner) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `spawn`
[INFO] [stderr]    --> src/async_await_basics.rs:198:5
[INFO] [stderr]     |
[INFO] [stderr] 198 |     fn spawn(&self, future: impl Future<Output=()> + 'static + Send) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/async_await_basics.rs:224:5
[INFO] [stderr]     |
[INFO] [stderr] 224 |     fn run(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SkRustNetworking` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sk_rust_networking`
[INFO] [stderr] 
[INFO] [stderr] warning: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread::Thread`
[INFO] [stderr]  --> src/async_await_basics.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::thread::Thread;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::mpsc`
[INFO] [stderr]  --> src/async_await_basics.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::sync::mpsc;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::join`
[INFO] [stderr]  --> src/async_await_basics.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use futures::join;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::net::TcpStream`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use tokio::net::TcpStream;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::io::AsyncWrite`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use tokio::io::AsyncWrite;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::prelude::*`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use tokio::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `async_await_basics_main`
[INFO] [stderr]   --> src/async_await_basics.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn async_await_basics_main() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Song`
[INFO] [stderr]   --> src/async_await_basics.rs:48:8
[INFO] [stderr]    |
[INFO] [stderr] 48 | struct Song {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/async_await_basics.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn new() -> Song {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `learn_song`
[INFO] [stderr]   --> src/async_await_basics.rs:58:10
[INFO] [stderr]    |
[INFO] [stderr] 58 | async fn learn_song() -> Song {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sing_song`
[INFO] [stderr]   --> src/async_await_basics.rs:66:10
[INFO] [stderr]    |
[INFO] [stderr] 66 | async fn sing_song(song: Song) {
[INFO] [stderr]    |          ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dance`
[INFO] [stderr]   --> src/async_await_basics.rs:72:10
[INFO] [stderr]    |
[INFO] [stderr] 72 | async fn dance() {
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `learn_and_sing`
[INFO] [stderr]   --> src/async_await_basics.rs:76:10
[INFO] [stderr]    |
[INFO] [stderr] 76 | async fn learn_and_sing() {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `async_main`
[INFO] [stderr]   --> src/async_await_basics.rs:81:10
[INFO] [stderr]    |
[INFO] [stderr] 81 | async fn async_main() {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Executor`
[INFO] [stderr]    --> src/async_await_basics.rs:163:8
[INFO] [stderr]     |
[INFO] [stderr] 163 | struct Executor {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `future`
[INFO] [stderr]    --> src/async_await_basics.rs:182:5
[INFO] [stderr]     |
[INFO] [stderr] 182 |     future: Mutex<Option<BoxFuture<'static, ()>>>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `new_executor_and_spawner`
[INFO] [stderr]    --> src/async_await_basics.rs:188:4
[INFO] [stderr]     |
[INFO] [stderr] 188 | fn new_executor_and_spawner() -> (Executor, Spawner) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `spawn`
[INFO] [stderr]    --> src/async_await_basics.rs:198:5
[INFO] [stderr]     |
[INFO] [stderr] 198 |     fn spawn(&self, future: impl Future<Output=()> + 'static + Send) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/async_await_basics.rs:224:5
[INFO] [stderr]     |
[INFO] [stderr] 224 |     fn run(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SkRustNetworking` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sk_rust_networking`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::prelude`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use tokio::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SkRustNetworking` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sk_rust_networking`
[INFO] [stderr] 
[INFO] [stderr] warning: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "ff5a2352d88fca6b1060e1c65e1f1bed84977f2912304e3620c71ec8e2582429"`
[INFO] running `"docker" "rm" "-f" "ff5a2352d88fca6b1060e1c65e1f1bed84977f2912304e3620c71ec8e2582429"`
[INFO] [stdout] ff5a2352d88fca6b1060e1c65e1f1bed84977f2912304e3620c71ec8e2582429
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 53da9f6f08fd33eee55e1f352f6148a7c57e3e879d4ff57ea02298e61e1fd31b
[INFO] running `"docker" "start" "-a" "53da9f6f08fd33eee55e1f352f6148a7c57e3e879d4ff57ea02298e61e1fd31b"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused import: `std::thread::Thread`
[INFO] [stderr]  --> src/async_await_basics.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::thread::Thread;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::mpsc`
[INFO] [stderr]  --> src/async_await_basics.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::sync::mpsc;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::join`
[INFO] [stderr]  --> src/async_await_basics.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use futures::join;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `async_await_basics_main`
[INFO] [stderr]   --> src/async_await_basics.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn async_await_basics_main() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Song`
[INFO] [stderr]   --> src/async_await_basics.rs:48:8
[INFO] [stderr]    |
[INFO] [stderr] 48 | struct Song {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/async_await_basics.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn new() -> Song {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `learn_song`
[INFO] [stderr]   --> src/async_await_basics.rs:58:10
[INFO] [stderr]    |
[INFO] [stderr] 58 | async fn learn_song() -> Song {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sing_song`
[INFO] [stderr]   --> src/async_await_basics.rs:66:10
[INFO] [stderr]    |
[INFO] [stderr] 66 | async fn sing_song(song: Song) {
[INFO] [stderr]    |          ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dance`
[INFO] [stderr]   --> src/async_await_basics.rs:72:10
[INFO] [stderr]    |
[INFO] [stderr] 72 | async fn dance() {
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `learn_and_sing`
[INFO] [stderr]   --> src/async_await_basics.rs:76:10
[INFO] [stderr]    |
[INFO] [stderr] 76 | async fn learn_and_sing() {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `async_main`
[INFO] [stderr]   --> src/async_await_basics.rs:81:10
[INFO] [stderr]    |
[INFO] [stderr] 81 | async fn async_main() {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Executor`
[INFO] [stderr]    --> src/async_await_basics.rs:163:8
[INFO] [stderr]     |
[INFO] [stderr] 163 | struct Executor {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `future`
[INFO] [stderr]    --> src/async_await_basics.rs:182:5
[INFO] [stderr]     |
[INFO] [stderr] 182 |     future: Mutex<Option<BoxFuture<'static, ()>>>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `new_executor_and_spawner`
[INFO] [stderr]    --> src/async_await_basics.rs:188:4
[INFO] [stderr]     |
[INFO] [stderr] 188 | fn new_executor_and_spawner() -> (Executor, Spawner) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `spawn`
[INFO] [stderr]    --> src/async_await_basics.rs:198:5
[INFO] [stderr]     |
[INFO] [stderr] 198 |     fn spawn(&self, future: impl Future<Output=()> + 'static + Send) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/async_await_basics.rs:224:5
[INFO] [stderr]     |
[INFO] [stderr] 224 |     fn run(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SkRustNetworking` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sk_rust_networking`
[INFO] [stderr] 
[INFO] [stderr] warning: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::net::TcpStream`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use tokio::net::TcpStream;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::io::AsyncWrite`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use tokio::io::AsyncWrite;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::prelude::*`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use tokio::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::prelude`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use tokio::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SkRustNetworking` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sk_rust_networking`
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread::Thread`
[INFO] [stdout] 
[INFO] [stderr]  --> src/async_await_basics.rs:2:5
[INFO] [stdout] running 0 tests
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr] 2 | use std::thread::Thread;
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::mpsc`
[INFO] [stderr]  --> src/async_await_basics.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::sync::mpsc;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures::join`
[INFO] [stderr]  --> src/async_await_basics.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use futures::join;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `async_await_basics_main`
[INFO] [stderr]   --> src/async_await_basics.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn async_await_basics_main() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Song`
[INFO] [stderr]   --> src/async_await_basics.rs:48:8
[INFO] [stderr]    |
[INFO] [stderr] 48 | struct Song {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/async_await_basics.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn new() -> Song {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `learn_song`
[INFO] [stderr]   --> src/async_await_basics.rs:58:10
[INFO] [stderr]    |
[INFO] [stderr] 58 | async fn learn_song() -> Song {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sing_song`
[INFO] [stderr]   --> src/async_await_basics.rs:66:10
[INFO] [stderr]    |
[INFO] [stderr] 66 | async fn sing_song(song: Song) {
[INFO] [stderr]    |          ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dance`
[INFO] [stderr]   --> src/async_await_basics.rs:72:10
[INFO] [stderr]    |
[INFO] [stderr] 72 | async fn dance() {
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `learn_and_sing`
[INFO] [stderr]   --> src/async_await_basics.rs:76:10
[INFO] [stderr]    |
[INFO] [stderr] 76 | async fn learn_and_sing() {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `async_main`
[INFO] [stderr]   --> src/async_await_basics.rs:81:10
[INFO] [stderr]    |
[INFO] [stderr] 81 | async fn async_main() {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Executor`
[INFO] [stderr]    --> src/async_await_basics.rs:163:8
[INFO] [stderr]     |
[INFO] [stderr] 163 | struct Executor {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `future`
[INFO] [stderr]    --> src/async_await_basics.rs:182:5
[INFO] [stderr]     |
[INFO] [stderr] 182 |     future: Mutex<Option<BoxFuture<'static, ()>>>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `new_executor_and_spawner`
[INFO] [stderr]    --> src/async_await_basics.rs:188:4
[INFO] [stderr]     |
[INFO] [stderr] 188 | fn new_executor_and_spawner() -> (Executor, Spawner) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `spawn`
[INFO] [stderr]    --> src/async_await_basics.rs:198:5
[INFO] [stderr]     |
[INFO] [stderr] 198 |     fn spawn(&self, future: impl Future<Output=()> + 'static + Send) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/async_await_basics.rs:224:5
[INFO] [stderr]     |
[INFO] [stderr] 224 |     fn run(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SkRustNetworking` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sk_rust_networking`
[INFO] [stderr] 
[INFO] [stderr] warning: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/SkRustNetworking-4d6efcd6c8f2cb7e
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/SkRustNetworking-36251f3e9bbedf78
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests SkRustNetworking
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "53da9f6f08fd33eee55e1f352f6148a7c57e3e879d4ff57ea02298e61e1fd31b"`
[INFO] running `"docker" "rm" "-f" "53da9f6f08fd33eee55e1f352f6148a7c57e3e879d4ff57ea02298e61e1fd31b"`
[INFO] [stdout] 53da9f6f08fd33eee55e1f352f6148a7c57e3e879d4ff57ea02298e61e1fd31b