[INFO] cloning repository https://github.com/GoX1337/mqtt-broker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/GoX1337/mqtt-broker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGoX1337%2Fmqtt-broker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGoX1337%2Fmqtt-broker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bbbbe206df87a03f4a6010e7fa92f160c822f7ae
[INFO] checking GoX1337/mqtt-broker against master#7dc9ff5c629753b6930ecfe9a0446538b8e25fb7 for pr-85387
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGoX1337%2Fmqtt-broker" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/GoX1337/mqtt-broker on toolchain 7dc9ff5c629753b6930ecfe9a0446538b8e25fb7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/GoX1337/mqtt-broker
[INFO] finished tweaking git repo https://github.com/GoX1337/mqtt-broker
[INFO] tweaked toml for git repo https://github.com/GoX1337/mqtt-broker written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/GoX1337/mqtt-broker already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4408f860cbb51b4ed242e41aa354195c4b3ed8fe86a110b8796c5ddc0a82ab97
[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" "4408f860cbb51b4ed242e41aa354195c4b3ed8fe86a110b8796c5ddc0a82ab97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4408f860cbb51b4ed242e41aa354195c4b3ed8fe86a110b8796c5ddc0a82ab97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4408f860cbb51b4ed242e41aa354195c4b3ed8fe86a110b8796c5ddc0a82ab97", kill_on_drop: false }`
[INFO] [stdout] 4408f860cbb51b4ed242e41aa354195c4b3ed8fe86a110b8796c5ddc0a82ab97
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 399e1db8e0c09f4e47d78487bc556ecfafb3752728082aed3380e46a94276ac9
[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" "399e1db8e0c09f4e47d78487bc556ecfafb3752728082aed3380e46a94276ac9", kill_on_drop: false }`
[INFO] [stderr]     Checking mqtt-broker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `CONNECTION_ACCEPTED` should have an upper camel case name
[INFO] [stdout]  --> src/mqtt/return_code.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 |    CONNECTION_ACCEPTED,
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `ConnectionAccepted`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `CONNECTION_ACCEPTED` should have an upper camel case name
[INFO] [stdout]  --> src/mqtt/return_code.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 |    CONNECTION_ACCEPTED,
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `ConnectionAccepted`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize`
[INFO] [stdout]   --> src/mqtt/packet.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn serialize(&self) -> Vec<u8> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UNKNOWN`
[INFO] [stdout]  --> src/mqtt/return_code.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 |    UNKNOWN
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_u8`
[INFO] [stdout]  --> src/mqtt/return_code.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn from_u8(value: u8) -> ReturnCode {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `serialize`
[INFO] [stdout]   --> src/mqtt/packet.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn serialize(&self) -> Vec<u8> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UNKNOWN`
[INFO] [stdout]  --> src/mqtt/return_code.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 |    UNKNOWN
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_u8`
[INFO] [stdout]  --> src/mqtt/return_code.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn from_u8(value: u8) -> ReturnCode {
[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 0.40s
[INFO] running `Command { std: "docker" "inspect" "399e1db8e0c09f4e47d78487bc556ecfafb3752728082aed3380e46a94276ac9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "399e1db8e0c09f4e47d78487bc556ecfafb3752728082aed3380e46a94276ac9", kill_on_drop: false }`
[INFO] [stdout] 399e1db8e0c09f4e47d78487bc556ecfafb3752728082aed3380e46a94276ac9