[INFO] cloning repository https://github.com/Stratus51/rust_mqtt_bridge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Stratus51/rust_mqtt_bridge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStratus51%2Frust_mqtt_bridge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStratus51%2Frust_mqtt_bridge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b207082a96a0f230a324215b4698f1c9fac21d02
[INFO] checking Stratus51/rust_mqtt_bridge against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FStratus51%2Frust_mqtt_bridge" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Stratus51/rust_mqtt_bridge on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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 /workspace/builds/worker-3/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 `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pretty_env_logger v0.2.5
[INFO] [stderr]   Downloaded rustc-demangle v0.1.14
[INFO] [stderr]   Downloaded mqtt311 v0.2.0
[INFO] [stderr]   Downloaded sct v0.4.0
[INFO] [stderr]   Downloaded jsonwebtoken v5.0.1
[INFO] [stderr]   Downloaded backtrace v0.3.24
[INFO] [stderr]   Downloaded mio v0.6.18
[INFO] [stderr]   Downloaded tokio v0.1.20
[INFO] [stderr]   Downloaded rustls v0.14.0
[INFO] [stderr]   Downloaded tokio-rustls v0.8.1
[INFO] [stderr]   Downloaded libc v0.2.55
[INFO] [stderr]   Downloaded webpki v0.18.1
[INFO] [stderr]   Downloaded derive_more v0.13.0
[INFO] [stderr]   Downloaded tokio-sync v0.1.5
[INFO] [stderr]   Downloaded rumqtt v0.30.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b51a3972fd1053624ff307e127204282e37c01284ba03747bb673972ca53c65e
[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" "b51a3972fd1053624ff307e127204282e37c01284ba03747bb673972ca53c65e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b51a3972fd1053624ff307e127204282e37c01284ba03747bb673972ca53c65e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b51a3972fd1053624ff307e127204282e37c01284ba03747bb673972ca53c65e", kill_on_drop: false }`
[INFO] [stdout] b51a3972fd1053624ff307e127204282e37c01284ba03747bb673972ca53c65e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=forbid" "-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ade40114eb094a42b4b3a1c7bfc05db329b34ae7754760911835f6885affa6d2
[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" "ade40114eb094a42b4b3a1c7bfc05db329b34ae7754760911835f6885affa6d2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling serde v1.0.91
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]    Compiling backtrace v0.3.24
[INFO] [stderr]     Checking tokio-trace-core v0.1.0
[INFO] [stderr]     Checking tokio-sync v0.1.5
[INFO] [stderr]     Checking crossbeam-channel v0.3.8
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking backtrace-sys v0.1.28
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking mio v0.6.18
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]     Checking tokio-threadpool v0.1.14
[INFO] [stderr]     Checking pretty_env_logger v0.2.5
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio v0.1.20
[INFO] [stderr]     Checking sct v0.4.0
[INFO] [stderr]     Checking webpki v0.18.1
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]     Checking rustls v0.14.0
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling serde_derive v1.0.91
[INFO] [stderr]    Compiling derive_more v0.13.0
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking tokio-rustls v0.8.1
[INFO] [stderr]     Checking mqtt311 v0.2.0
[INFO] [stderr]     Checking jsonwebtoken v5.0.1
[INFO] [stderr]     Checking rumqtt v0.30.1
[INFO] [stderr]     Checking mqtt_bridge_prototype v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `SingleBasicRoute`
[INFO] [stdout]   --> src/main.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | struct SingleBasicRoute {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `SingleBasicRouteError`
[INFO] [stdout]   --> src/main.rs:76:6
[INFO] [stdout]    |
[INFO] [stdout] 76 | enum SingleBasicRouteError {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_string`
[INFO] [stdout]   --> src/main.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn from_string(
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `start`
[INFO] [stdout]    --> src/main.rs:208:8
[INFO] [stdout]     |
[INFO] [stdout] 208 |     fn start(mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `SingleBasicRoute`
[INFO] [stdout]   --> src/main.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | struct SingleBasicRoute {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `SingleBasicRouteError`
[INFO] [stdout]   --> src/main.rs:76:6
[INFO] [stdout]    |
[INFO] [stdout] 76 | enum SingleBasicRouteError {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_string`
[INFO] [stdout]   --> src/main.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn from_string(
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `start`
[INFO] [stdout]    --> src/main.rs:208:8
[INFO] [stdout]     |
[INFO] [stdout] 208 |     fn start(mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] running `Command { std: "docker" "inspect" "ade40114eb094a42b4b3a1c7bfc05db329b34ae7754760911835f6885affa6d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ade40114eb094a42b4b3a1c7bfc05db329b34ae7754760911835f6885affa6d2", kill_on_drop: false }`
[INFO] [stdout] ade40114eb094a42b4b3a1c7bfc05db329b34ae7754760911835f6885affa6d2