[INFO] cloning repository https://github.com/SuperiorJT/mr-cd-projekt-red
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SuperiorJT/mr-cd-projekt-red" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSuperiorJT%2Fmr-cd-projekt-red", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSuperiorJT%2Fmr-cd-projekt-red'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 257f31bddc08c2423153a699c394df6e4f0e177c
[INFO] checking SuperiorJT/mr-cd-projekt-red against master#af3c6e733a40e671550e0f0f5aeecaa13772ba56 for pr-74989
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSuperiorJT%2Fmr-cd-projekt-red" "/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/SuperiorJT/mr-cd-projekt-red on toolchain af3c6e733a40e671550e0f0f5aeecaa13772ba56
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SuperiorJT/mr-cd-projekt-red
[INFO] finished tweaking git repo https://github.com/SuperiorJT/mr-cd-projekt-red
[INFO] tweaked toml for git repo https://github.com/SuperiorJT/mr-cd-projekt-red written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/SuperiorJT/mr-cd-projekt-red already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "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] e8dedeaec89ac06389c0fff48142d026bc184a37ffb80679c13730192e15c42a
[INFO] running `Command { std: "docker" "start" "-a" "e8dedeaec89ac06389c0fff48142d026bc184a37ffb80679c13730192e15c42a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e8dedeaec89ac06389c0fff48142d026bc184a37ffb80679c13730192e15c42a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8dedeaec89ac06389c0fff48142d026bc184a37ffb80679c13730192e15c42a", kill_on_drop: false }`
[INFO] [stdout] e8dedeaec89ac06389c0fff48142d026bc184a37ffb80679c13730192e15c42a
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "check" "--frozen" "--all" "--all-targets" "--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] e3da8333d60940e0213af04f2fe3ff1159f7270ceb0c06bea1b84af30eb018db
[INFO] running `Command { std: "docker" "start" "-a" "e3da8333d60940e0213af04f2fe3ff1159f7270ceb0c06bea1b84af30eb018db", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling proc-macro2 v1.0.17
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling syn v1.0.27
[INFO] [stderr]     Checking once_cell v1.4.0
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling crc32fast v1.1.2
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]    Compiling rustc-demangle v0.1.14
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.26
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling termcolor v1.0.4
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling proc-macro-hack v0.5.16
[INFO] [stderr]     Checking base64 v0.11.0
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling adler32 v1.0.3
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]     Checking tower-service v0.3.0
[INFO] [stderr]     Checking dtoa v0.4.4
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking utf-8 v0.7.5
[INFO] [stderr]    Compiling serenity v0.8.6 (https://github.com/serenity-rs/serenity.git?branch=next#94d22c3a)
[INFO] [stderr]     Checking fallible-streaming-iterator v0.1.9
[INFO] [stderr]     Checking rust-ini v0.13.0
[INFO] [stderr]     Checking uwl v0.6.0
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking kankyo v0.3.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]    Compiling unicase v2.4.0
[INFO] [stderr]    Compiling regex-syntax v0.6.5
[INFO] [stderr]    Compiling backtrace v0.3.26
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking lru-cache v0.1.2
[INFO] [stderr]     Checking yaml-rust v0.4.2
[INFO] [stderr]     Checking block-padding v0.1.3
[INFO] [stderr]     Checking scheduled-thread-pool v0.2.0
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking smallvec v0.6.8
[INFO] [stderr]    Compiling clang-sys v0.26.4
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]     Checking encoding_rs v0.8.17
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]    Compiling nom v4.2.1
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling lexical-core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]     Checking num-integer v0.1.39
[INFO] [stderr]     Checking generic-array v0.12.0
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking unicode-normalization v0.1.8
[INFO] [stderr]    Compiling hashbrown v0.1.8
[INFO] [stderr]    Compiling libflate v0.1.21
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling filetime v0.2.4
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.9.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]     Checking block-buffer v0.7.0
[INFO] [stderr]     Checking digest v0.8.0
[INFO] [stderr]    Compiling bindgen v0.48.1
[INFO] [stderr]    Compiling ring v0.16.13
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling libsqlite3-sys v0.18.0
[INFO] [stderr]     Checking mime v0.3.13
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling cexpr v0.3.5
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]    Compiling tar v0.4.22
[INFO] [stderr]     Checking threadpool v1.7.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking sha-1 v0.8.1
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking input_buffer v0.2.0
[INFO] [stderr]     Checking r2d2 v0.8.8
[INFO] [stderr]     Checking tokio v0.2.21
[INFO] [stderr]     Checking serde-hjson v0.9.1
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking flate2 v1.0.6
[INFO] [stderr]    Compiling libsodium-sys v0.2.2
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]    Compiling env_logger v0.6.1
[INFO] [stderr]     Checking tungstenite v0.9.2
[INFO] [stderr]     Checking webpki v0.21.2
[INFO] [stderr]     Checking sct v0.6.0
[INFO] [stderr]     Checking webpki-roots v0.18.0
[INFO] [stderr]     Checking rustls v0.17.0
[INFO] [stderr]     Checking ct-logs v0.6.0
[INFO] [stderr]     Checking rustls v0.16.0
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-rustls v0.13.1
[INFO] [stderr]     Checking rustls-native-certs v0.3.0
[INFO] [stderr]     Checking rusqlite v0.23.1
[INFO] [stderr]    Compiling serde_derive v1.0.110
[INFO] [stderr]    Compiling pin-project-internal v0.4.17
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling command_attr v0.2.0 (https://github.com/serenity-rs/serenity.git?branch=next#94d22c3a)
[INFO] [stderr]     Checking r2d2_sqlite v0.16.0
[INFO] [stderr]    Compiling audiopus_sys v0.1.1
[INFO] [stderr]     Checking audiopus v0.1.2
[INFO] [stderr]     Checking pin-project v0.4.17
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking serde v1.0.110
[INFO] [stderr]     Checking h2 v0.2.5
[INFO] [stderr]     Checking hyper v0.13.5
[INFO] [stderr]     Checking serde_json v1.0.37
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking config v0.10.1
[INFO] [stderr]     Checking hyper-rustls v0.20.0
[INFO] [stderr]     Checking reqwest v0.10.4
[INFO] [stderr]     Checking sodiumoxide v0.2.2
[INFO] [stderr]     Checking discord-bot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `SystemTime`, `UNIX_EPOCH`
[INFO] [stdout]  --> src/audio/receiver.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 |     time::{Instant, SystemTime, UNIX_EPOCH},
[INFO] [stdout]   |                     ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serenity::model::id::UserId`
[INFO] [stdout]   --> src/audio/receiver.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use serenity::model::id::UserId;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::DiscordAudioPacket`
[INFO] [stdout]   --> src/audio/receiver.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use super::DiscordAudioPacket;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SystemTime`, `UNIX_EPOCH`
[INFO] [stdout]  --> src/audio/receiver.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 |     time::{Instant, SystemTime, UNIX_EPOCH},
[INFO] [stdout]   |                     ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serenity::model::id::UserId`
[INFO] [stdout]   --> src/audio/receiver.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use serenity::model::id::UserId;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::DiscordAudioPacket`
[INFO] [stdout]   --> src/audio/receiver.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use super::DiscordAudioPacket;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/model/user.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::{Error, Result};
[INFO] [stdout]   |             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/model/user.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::{Error, Result};
[INFO] [stdout]   |             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/commands/voice/join.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut manager_lock = ctx
[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/commands/voice/join.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let mut buffer_lock = ctx
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/commands/voice/join.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut manager_lock = ctx
[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/commands/voice/join.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let mut buffer_lock = ctx
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/audio/buffer_manager.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `mute`
[INFO] [stdout]   --> src/audio/receiver.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     mute: bool,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `instant`
[INFO] [stdout]   --> src/audio/receiver.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     instant: Instant,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/audio/buffer_manager.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `mute`
[INFO] [stdout]   --> src/audio/receiver.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     mute: bool,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `instant`
[INFO] [stdout]   --> src/audio/receiver.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     instant: Instant,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/audio/receiver.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |         buffer.update_track_mix(ssrc, volume);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/audio/receiver.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |         buffer.update_track_mix(ssrc, volume);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6m 22s
[INFO] running `Command { std: "docker" "inspect" "e3da8333d60940e0213af04f2fe3ff1159f7270ceb0c06bea1b84af30eb018db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3da8333d60940e0213af04f2fe3ff1159f7270ceb0c06bea1b84af30eb018db", kill_on_drop: false }`
[INFO] [stdout] e3da8333d60940e0213af04f2fe3ff1159f7270ceb0c06bea1b84af30eb018db
