[INFO] cloning repository https://github.com/Keksoj/mqtt_ping_pong
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Keksoj/mqtt_ping_pong" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeksoj%2Fmqtt_ping_pong"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeksoj%2Fmqtt_ping_pong'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 29f6dcb97f96fa75f1aba1036fea3df24ca77c89
[INFO] checking Keksoj/mqtt_ping_pong against master#bd0bacc694d7d8175804bb6f690cb846bfa4a9ee for pr-71665
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKeksoj%2Fmqtt_ping_pong" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Keksoj/mqtt_ping_pong on toolchain bd0bacc694d7d8175804bb6f690cb846bfa4a9ee
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Keksoj/mqtt_ping_pong
[INFO] finished tweaking git repo https://github.com/Keksoj/mqtt_ping_pong
[INFO] tweaked toml for git repo https://github.com/Keksoj/mqtt_ping_pong written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Keksoj/mqtt_ping_pong already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c9ae6c0a8bb663d860297c3384710924d80ca873c29a86a9de92502d439ae62f
[INFO] running `"docker" "start" "-a" "c9ae6c0a8bb663d860297c3384710924d80ca873c29a86a9de92502d439ae62f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling cc v1.0.52
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling paho-mqtt-sys v0.2.1
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking futures-timer v0.1.1
[INFO] [stderr]     Checking paho-mqtt v0.6.0
[INFO] [stderr]     Checking mqtt_ping_pong v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `SyncMqttClient`
[INFO] [stderr]  --> src/sync_ping.rs:3:16
[INFO] [stderr]   |
[INFO] [stderr] 3 | use sync_lib::{SyncMqttClient, SyncMqttClientBuilder};
[INFO] [stderr]   |                ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SyncMqttClient`
[INFO] [stderr]  --> src/sync_ping.rs:3:16
[INFO] [stderr]   |
[INFO] [stderr] 3 | use sync_lib::{SyncMqttClient, SyncMqttClientBuilder};
[INFO] [stderr]   |                ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `AsyncMqttClient`
[INFO] [stderr]  --> src/async_ping.rs:3:17
[INFO] [stderr]   |
[INFO] [stderr] 3 | use async_lib::{AsyncMqttClient, AsyncMqttClientBuilder};
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `AsyncMqttClient`
[INFO] [stderr]  --> src/async_ping.rs:3:17
[INFO] [stderr]   |
[INFO] [stderr] 3 | use async_lib::{AsyncMqttClient, AsyncMqttClientBuilder};
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SyncMqttClient`
[INFO] [stderr]  --> src/sync_pong.rs:3:16
[INFO] [stderr]   |
[INFO] [stderr] 3 | use sync_lib::{SyncMqttClient, SyncMqttClientBuilder};
[INFO] [stderr]   |                ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SyncMqttClient`
[INFO] [stderr]  --> src/sync_pong.rs:3:16
[INFO] [stderr]   |
[INFO] [stderr] 3 | use sync_lib::{SyncMqttClient, SyncMqttClientBuilder};
[INFO] [stderr]   |                ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `disconnect`
[INFO] [stderr]    --> src/async_lib.rs:123:5
[INFO] [stderr]     |
[INFO] [stderr] 123 |     pub fn disconnect(&self) -> Result<(), Box<dyn Error>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `disconnect`
[INFO] [stderr]    --> src/async_lib.rs:123:5
[INFO] [stderr]     |
[INFO] [stderr] 123 |     pub fn disconnect(&self) -> Result<(), Box<dyn Error>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `disconnect`
[INFO] [stderr]    --> src/async_lib.rs:123:5
[INFO] [stderr]     |
[INFO] [stderr] 123 |     pub fn disconnect(&self) -> Result<(), Box<dyn Error>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `HOST`
[INFO] [stderr]  --> src/variables.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub const HOST: &'static str = "test.mosquitto.org:1883";
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `disconnect`
[INFO] [stderr]    --> src/async_lib.rs:123:5
[INFO] [stderr]     |
[INFO] [stderr] 123 |     pub fn disconnect(&self) -> Result<(), Box<dyn Error>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `HOST`
[INFO] [stderr]  --> src/variables.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub const HOST: &'static str = "test.mosquitto.org:1883";
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.25s
[INFO] running `"docker" "inspect" "c9ae6c0a8bb663d860297c3384710924d80ca873c29a86a9de92502d439ae62f"`
[INFO] running `"docker" "rm" "-f" "c9ae6c0a8bb663d860297c3384710924d80ca873c29a86a9de92502d439ae62f"`
[INFO] [stdout] c9ae6c0a8bb663d860297c3384710924d80ca873c29a86a9de92502d439ae62f