[INFO] updating cached repository https://github.com/realSuffix/sound_server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4a3a54f44ca60d3511771923a0e3858b6b079920
[INFO] testing realSuffix/sound_server against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FrealSuffix%2Fsound_server" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/realSuffix/sound_server on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/realSuffix/sound_server
[INFO] finished tweaking git repo https://github.com/realSuffix/sound_server
[INFO] tweaked toml for git repo https://github.com/realSuffix/sound_server written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/realSuffix/sound_server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b932b2a0c035e030edf60b7adb2d6ecc63cbd02e507a913438df28b6a0fb3b7
[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" "6b932b2a0c035e030edf60b7adb2d6ecc63cbd02e507a913438df28b6a0fb3b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b932b2a0c035e030edf60b7adb2d6ecc63cbd02e507a913438df28b6a0fb3b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b932b2a0c035e030edf60b7adb2d6ecc63cbd02e507a913438df28b6a0fb3b7", kill_on_drop: false }`
[INFO] [stdout] 6b932b2a0c035e030edf60b7adb2d6ecc63cbd02e507a913438df28b6a0fb3b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b1cecbdd945f8955940d42ce63fbd5c619d08b8b2fbb23a5d68d25ac3cb9eaa9
[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" "b1cecbdd945f8955940d42ce63fbd5c619d08b8b2fbb23a5d68d25ac3cb9eaa9", kill_on_drop: false }`
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling cpal v0.11.0
[INFO] [stderr]    Compiling ringbuf v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling thiserror v1.0.20
[INFO] [stderr]    Compiling sound_server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `buffer`
[INFO] [stdout]   --> src/connection_handler.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let mut buffer = [0; 1024];
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_buffer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/connection_handler.rs:15:19
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn handle(mut stream: TcpStream) {
[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/connection_handler.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let mut buffer = [0; 1024];
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.39s
[INFO] running `Command { std: "docker" "inspect" "b1cecbdd945f8955940d42ce63fbd5c619d08b8b2fbb23a5d68d25ac3cb9eaa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1cecbdd945f8955940d42ce63fbd5c619d08b8b2fbb23a5d68d25ac3cb9eaa9", kill_on_drop: false }`
[INFO] [stdout] b1cecbdd945f8955940d42ce63fbd5c619d08b8b2fbb23a5d68d25ac3cb9eaa9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen" "--no-run" "--message-format=json", 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] d23b7dcb5998e06a85c7ef1ff212e07c4b18fd702984a665a4792c04b3b246bd
[INFO] running `Command { std: "docker" "start" "-a" "d23b7dcb5998e06a85c7ef1ff212e07c4b18fd702984a665a4792c04b3b246bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling sound_server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `buffer`
[INFO] [stdout]   --> src/connection_handler.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let mut buffer = [0; 1024];
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_buffer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/connection_handler.rs:15:19
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn handle(mut stream: TcpStream) {
[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/connection_handler.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let mut buffer = [0; 1024];
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "d23b7dcb5998e06a85c7ef1ff212e07c4b18fd702984a665a4792c04b3b246bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d23b7dcb5998e06a85c7ef1ff212e07c4b18fd702984a665a4792c04b3b246bd", kill_on_drop: false }`
[INFO] [stdout] d23b7dcb5998e06a85c7ef1ff212e07c4b18fd702984a665a4792c04b3b246bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] de26f1ac0725b8934c90bb459912fa4e82e8ab7fe912be598637013624cde2d6
[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" "de26f1ac0725b8934c90bb459912fa4e82e8ab7fe912be598637013624cde2d6", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `buffer`
[INFO] [stderr]   --> src/connection_handler.rs:21:13
[INFO] [stderr]    |
[INFO] [stderr] 21 |         let mut buffer = [0; 1024];
[INFO] [stderr]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_buffer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/connection_handler.rs:15:19
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn handle(mut stream: TcpStream) {
[INFO] [stderr]    |                   ----^^^^^^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/connection_handler.rs:21:13
[INFO] [stderr]    |
[INFO] [stderr] 21 |         let mut buffer = [0; 1024];
[INFO] [stderr]    |             ----^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/sound_server-6733c49180bb4b4e
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "de26f1ac0725b8934c90bb459912fa4e82e8ab7fe912be598637013624cde2d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de26f1ac0725b8934c90bb459912fa4e82e8ab7fe912be598637013624cde2d6", kill_on_drop: false }`
[INFO] [stdout] de26f1ac0725b8934c90bb459912fa4e82e8ab7fe912be598637013624cde2d6