[INFO] cloning repository https://github.com/chinmaykumar021/rustmqtt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chinmaykumar021/rustmqtt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchinmaykumar021%2Frustmqtt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchinmaykumar021%2Frustmqtt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b2ae0b3f80e694e79530962ae7c0e7037c75ca08
[INFO] checking chinmaykumar021/rustmqtt against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchinmaykumar021%2Frustmqtt" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/chinmaykumar021/rustmqtt
[INFO] finished tweaking git repo https://github.com/chinmaykumar021/rustmqtt
[INFO] tweaked toml for git repo https://github.com/chinmaykumar021/rustmqtt written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/chinmaykumar021/rustmqtt on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/chinmaykumar021/rustmqtt 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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 14484b0d49fbf4767870fb91f04a1df97145c6e134729144ea9d7043b11efcb9
[INFO] running `Command { std: "docker" "start" "-a" "14484b0d49fbf4767870fb91f04a1df97145c6e134729144ea9d7043b11efcb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14484b0d49fbf4767870fb91f04a1df97145c6e134729144ea9d7043b11efcb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14484b0d49fbf4767870fb91f04a1df97145c6e134729144ea9d7043b11efcb9", kill_on_drop: false }`
[INFO] [stdout] 14484b0d49fbf4767870fb91f04a1df97145c6e134729144ea9d7043b11efcb9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 048d9b16184d9a18fe26577950109756948bacff76e57e367eb5c1d96c1eb36f
[INFO] running `Command { std: "docker" "start" "-a" "048d9b16184d9a18fe26577950109756948bacff76e57e367eb5c1d96c1eb36f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling cc v1.0.88
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling pkg-config v0.3.30
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]    Compiling thiserror v1.0.57
[INFO] [stderr]     Checking event-listener v2.5.3
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking futures-timer v3.0.3
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]     Checking concurrent-queue v2.4.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.11
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking async-channel v1.9.0
[INFO] [stderr]    Compiling cmake v0.1.50
[INFO] [stderr]    Compiling syn v2.0.51
[INFO] [stderr]    Compiling openssl-sys v0.9.101
[INFO] [stderr]    Compiling paho-mqtt-sys v0.9.0 (https://github.com/eclipse/paho.mqtt.rust.git?branch=master#a8618882)
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling thiserror-impl v1.0.57
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking paho-mqtt v0.13.0-pre.0 (https://github.com/eclipse/paho.mqtt.rust.git?branch=master#a8618882)
[INFO] [stderr]     Checking demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/pub/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut cli = mqtt::Client::new(create_opts).unwrap_or_else(|err| {
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/sub/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut cli = mqtt::Client::new(create_opts).unwrap_or_else(|err| {
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/pub/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut cli = mqtt::Client::new(create_opts).unwrap_or_else(|err| {
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/sub/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut cli = mqtt::Client::new(create_opts).unwrap_or_else(|err| {
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.14s
[INFO] running `Command { std: "docker" "inspect" "048d9b16184d9a18fe26577950109756948bacff76e57e367eb5c1d96c1eb36f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "048d9b16184d9a18fe26577950109756948bacff76e57e367eb5c1d96c1eb36f", kill_on_drop: false }`
[INFO] [stdout] 048d9b16184d9a18fe26577950109756948bacff76e57e367eb5c1d96c1eb36f