[INFO] updating cached repository https://github.com/Stratus51/rust_mqtt_bridge
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/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] b207082a96a0f230a324215b4698f1c9fac21d02
[INFO] checking Stratus51/rust_mqtt_bridge against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FStratus51%2Frust_mqtt_bridge" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Stratus51/rust_mqtt_bridge on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Stratus51/rust_mqtt_bridge
[INFO] finished tweaking git repo https://github.com/Stratus51/rust_mqtt_bridge
[INFO] tweaked toml for git repo https://github.com/Stratus51/rust_mqtt_bridge written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Stratus51/rust_mqtt_bridge already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a6fce8d49d963ac3e1e2522b7fb543dcb72fc24ac351fc6be35812a019cedcbb
[INFO] running `"docker" "start" "-a" "a6fce8d49d963ac3e1e2522b7fb543dcb72fc24ac351fc6be35812a019cedcbb"`
[INFO] [stderr]    Compiling autocfg v0.1.4
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[INFO] [stderr]    Compiling serde_derive v1.0.91
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[INFO] [stderr]     Checking rumqtt v0.30.1
[INFO] [stderr]     Checking mqtt_bridge_prototype v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: struct is never constructed: `SingleBasicRoute`
[INFO] [stderr]   --> src/main.rs:68:1
[INFO] [stderr]    |
[INFO] [stderr] 68 | struct SingleBasicRoute {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `SingleBasicRouteError`
[INFO] [stderr]   --> src/main.rs:76:1
[INFO] [stderr]    |
[INFO] [stderr] 76 | enum SingleBasicRouteError {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_string`
[INFO] [stderr]    --> src/main.rs:84:5
[INFO] [stderr]     |
[INFO] [stderr] 84  | /     fn from_string(
[INFO] [stderr] 85  | |         clients_list: HashMap<String, ClientId>,
[INFO] [stderr] 86  | |         s: &str,
[INFO] [stderr] 87  | |     ) -> Result<SingleBasicRoute, SingleBasicRouteError> {
[INFO] [stderr] ...   |
[INFO] [stderr] 122 | |         })
[INFO] [stderr] 123 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `start`
[INFO] [stderr]    --> src/main.rs:208:5
[INFO] [stderr]     |
[INFO] [stderr] 208 |     fn start(mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SingleBasicRoute`
[INFO] [stderr]   --> src/main.rs:68:1
[INFO] [stderr]    |
[INFO] [stderr] 68 | struct SingleBasicRoute {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `SingleBasicRouteError`
[INFO] [stderr]   --> src/main.rs:76:1
[INFO] [stderr]    |
[INFO] [stderr] 76 | enum SingleBasicRouteError {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_string`
[INFO] [stderr]    --> src/main.rs:84:5
[INFO] [stderr]     |
[INFO] [stderr] 84  | /     fn from_string(
[INFO] [stderr] 85  | |         clients_list: HashMap<String, ClientId>,
[INFO] [stderr] 86  | |         s: &str,
[INFO] [stderr] 87  | |     ) -> Result<SingleBasicRoute, SingleBasicRouteError> {
[INFO] [stderr] ...   |
[INFO] [stderr] 122 | |         })
[INFO] [stderr] 123 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `start`
[INFO] [stderr]    --> src/main.rs:208:5
[INFO] [stderr]     |
[INFO] [stderr] 208 |     fn start(mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 36s
[INFO] running `"docker" "inspect" "a6fce8d49d963ac3e1e2522b7fb543dcb72fc24ac351fc6be35812a019cedcbb"`
[INFO] running `"docker" "rm" "-f" "a6fce8d49d963ac3e1e2522b7fb543dcb72fc24ac351fc6be35812a019cedcbb"`
[INFO] [stdout] a6fce8d49d963ac3e1e2522b7fb543dcb72fc24ac351fc6be35812a019cedcbb