[INFO] cloning repository https://github.com/Elrohil44/Chat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Elrohil44/Chat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FElrohil44%2FChat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FElrohil44%2FChat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3530bf8acef7cc2c527da831b0fd2f1a0ecbb88d
[INFO] checking Elrohil44/Chat against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FElrohil44%2FChat" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Elrohil44/Chat on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Elrohil44/Chat
[INFO] finished tweaking git repo https://github.com/Elrohil44/Chat
[INFO] tweaked toml for git repo https://github.com/Elrohil44/Chat written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Elrohil44/Chat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a246e98539e2620120d0cb14918359dd920b030d8011796165f2a3f9418a015b
[INFO] running `Command { std: "docker" "start" "-a" "a246e98539e2620120d0cb14918359dd920b030d8011796165f2a3f9418a015b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a246e98539e2620120d0cb14918359dd920b030d8011796165f2a3f9418a015b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a246e98539e2620120d0cb14918359dd920b030d8011796165f2a3f9418a015b", kill_on_drop: false }`
[INFO] [stdout] a246e98539e2620120d0cb14918359dd920b030d8011796165f2a3f9418a015b
[INFO] running `Command { std: "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" "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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3337471047ad3ad1ab112292a3e612f31ef782bec878a70031b08d57335a4895
[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" "3337471047ad3ad1ab112292a3e612f31ef782bec878a70031b08d57335a4895", kill_on_drop: false }`
[INFO] [stderr]     Checking threadpool v1.7.1
[INFO] [stderr]     Checking chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/server.rs:89:37
[INFO] [stdout]    |
[INFO] [stdout] 89 | ...                   let mut clients_locked = clients.lock().unwrap();
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/server.rs:89:37
[INFO] [stdout]    |
[INFO] [stdout] 89 | ...                   let mut clients_locked = clients.lock().unwrap();
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.47s
[INFO] running `Command { std: "docker" "inspect" "3337471047ad3ad1ab112292a3e612f31ef782bec878a70031b08d57335a4895", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3337471047ad3ad1ab112292a3e612f31ef782bec878a70031b08d57335a4895", kill_on_drop: false }`
[INFO] [stdout] 3337471047ad3ad1ab112292a3e612f31ef782bec878a70031b08d57335a4895