[INFO] cloning repository https://github.com/marverlous811/simple-rtp-engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/marverlous811/simple-rtp-engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarverlous811%2Fsimple-rtp-engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarverlous811%2Fsimple-rtp-engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9efe308227f9a6a575848aacf64547ab203360fc
[INFO] checking marverlous811/simple-rtp-engine against try#438eb4c1a1c3841523d7f672601e8adbe04cff28 for pr-147589-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarverlous811%2Fsimple-rtp-engine" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/marverlous811/simple-rtp-engine
[INFO] finished tweaking git repo https://github.com/marverlous811/simple-rtp-engine
[INFO] tweaked toml for git repo https://github.com/marverlous811/simple-rtp-engine written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/marverlous811/simple-rtp-engine on toolchain 438eb4c1a1c3841523d7f672601e8adbe04cff28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+438eb4c1a1c3841523d7f672601e8adbe04cff28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/marverlous811/simple-rtp-engine 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" "+438eb4c1a1c3841523d7f672601e8adbe04cff28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+438eb4c1a1c3841523d7f672601e8adbe04cff28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c65bdade28580f99a4649230b69460cd92b773d19dff6e20077fac1b4f5b7e80
[INFO] running `Command { std: "docker" "start" "-a" "c65bdade28580f99a4649230b69460cd92b773d19dff6e20077fac1b4f5b7e80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c65bdade28580f99a4649230b69460cd92b773d19dff6e20077fac1b4f5b7e80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c65bdade28580f99a4649230b69460cd92b773d19dff6e20077fac1b4f5b7e80", kill_on_drop: false }`
[INFO] [stdout] c65bdade28580f99a4649230b69460cd92b773d19dff6e20077fac1b4f5b7e80
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+438eb4c1a1c3841523d7f672601e8adbe04cff28" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f2d0eb76b7e63d2f02e32656577a05ea23c2b41f36798e78eabbf87a2a5a07b
[INFO] running `Command { std: "docker" "start" "-a" "4f2d0eb76b7e63d2f02e32656577a05ea23c2b41f36798e78eabbf87a2a5a07b", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.203
[INFO] [stderr]    Compiling syn v2.0.67
[INFO] [stderr]    Compiling cc v1.0.99
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking unicode-normalization v0.1.23
[INFO] [stderr]    Compiling rustix v0.38.34
[INFO] [stderr]     Checking is_terminal_polyfill v1.70.0
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]     Checking anstyle v1.0.7
[INFO] [stderr]     Checking colorchoice v1.0.1
[INFO] [stderr]     Checking anstyle-query v1.1.0
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]    Compiling substring v1.4.5
[INFO] [stderr]     Checking linux-raw-sys v0.4.14
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]     Checking indexmap v2.2.6
[INFO] [stderr]     Checking hash32 v0.3.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde_json v1.0.118
[INFO] [stderr]     Checking idna v0.5.0
[INFO] [stderr]     Checking dirs-sys v0.4.1
[INFO] [stderr]     Checking signal-hook v0.3.17
[INFO] [stderr]     Checking anstream v0.6.14
[INFO] [stderr]     Checking directories v5.0.1
[INFO] [stderr]     Checking url v2.5.2
[INFO] [stderr]    Compiling openssl-sys v0.9.102
[INFO] [stderr]     Checking regex v1.10.5
[INFO] [stderr]    Compiling openssl v0.10.64
[INFO] [stderr]    Compiling native-tls v0.2.12
[INFO] [stderr]     Checking env_filter v0.1.0
[INFO] [stderr]     Checking env_logger v0.11.3
[INFO] [stderr]     Checking http-body-util v0.1.2
[INFO] [stderr]    Compiling convert-enum v0.1.0
[INFO] [stderr]     Checking polling v3.7.2
[INFO] [stderr]    Compiling tokio-macros v2.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.203
[INFO] [stderr]    Compiling thiserror-impl v1.0.61
[INFO] [stderr]    Compiling pin-project-internal v1.1.5
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling derive_more v0.99.18
[INFO] [stderr]    Compiling async-trait v0.1.81
[INFO] [stderr]    Compiling maybe-async v0.2.10
[INFO] [stderr]     Checking tokio v1.38.0
[INFO] [stderr]     Checking pin-project v1.1.5
[INFO] [stderr]     Checking thiserror v1.0.61
[INFO] [stderr]     Checking sdp v0.6.2
[INFO] [stderr]     Checking sans-io-runtime v0.1.0 (https://github.com/8xFF/sans-io-runtime.git?rev=1be9705b4fe9852b7c1ac66dc610fedf94a83971#1be9705b)
[INFO] [stderr]     Checking tokio-util v0.7.11
[INFO] [stderr]     Checking tower v0.4.13
[INFO] [stderr]     Checking tokio-native-tls v0.3.1
[INFO] [stderr]     Checking pubsub v0.1.0 (/opt/rustwide/workdir/packages/pubsub)
[INFO] [stderr]     Checking h2 v0.4.5
[INFO] [stderr]     Checking serde_bytes v0.11.14
[INFO] [stderr]     Checking media v0.1.0 (/opt/rustwide/workdir/packages/media)
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stdout] warning: unused import: `sans_io_runtime::backend`
[INFO] [stdout]  --> packages/media/src/runtime/store.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use sans_io_runtime::backend;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:214:15
[INFO] [stdout]     |
[INFO] [stdout] 214 |   ) -> Option<(WorkerInnerOutput<'a, OwnerType, ExtOut, ChannelId, RtpEvent, SCfg>)> {
[INFO] [stdout]     |               ^                                                                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 214 -   ) -> Option<(WorkerInnerOutput<'a, OwnerType, ExtOut, ChannelId, RtpEvent, SCfg>)> {
[INFO] [stdout] 214 +   ) -> Option<WorkerInnerOutput<'a, OwnerType, ExtOut, ChannelId, RtpEvent, SCfg> > {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking serde_bencode v0.2.4
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:177:7
[INFO] [stdout]     |
[INFO] [stdout] 177 |       _ => WorkerInnerOutput::Ext(
[INFO] [stdout]     |       ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:177:7
[INFO] [stdout]     |
[INFO] [stdout] 140 |       MediaRpcCmd::Call(call_id, leg_id, sdp) => {
[INFO] [stdout]     |       --------------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 159 |       MediaRpcCmd::End(call_id) => {
[INFO] [stdout]     |       ------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 170 |       MediaRpcCmd::Ping => WorkerInnerOutput::Ext(
[INFO] [stdout]     |       ----------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 177 |       _ => WorkerInnerOutput::Ext(
[INFO] [stdout]     |       ^ collectively making this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `now`
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:265:23
[INFO] [stdout]     |
[INFO] [stdout] 265 |   fn spawn(&mut self, now: std::time::Instant, cfg: SCfg) {}
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cfg`
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:265:48
[INFO] [stdout]     |
[INFO] [stdout] 265 |   fn spawn(&mut self, now: std::time::Instant, cfg: SCfg) {}
[INFO] [stdout]     |                                                ^^^ help: if this is intentional, prefix it with an underscore: `_cfg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:290:7
[INFO] [stdout]     |
[INFO] [stdout] 273 |       WorkerInnerInput::Net(_owner, BackendIncoming::UdpListenResult { bind: _, result }) => match result {
[INFO] [stdout]     |       ----------------------------------------------------------------------------------- matches all the relevant values
[INFO] [stdout] ...
[INFO] [stdout] 290 |       WorkerInnerInput::Net(_owner, BackendIncoming::UdpListenResult { bind: _, result }) => match result {
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no value can reach this
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:338:9
[INFO] [stdout]     |
[INFO] [stdout] 337 |         ExtInput::Rpc(req) => Some(self.process_rpc_request(req)),
[INFO] [stdout]     |         ------------------ matches all the relevant values
[INFO] [stdout] 338 |         _ => None,
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `channel`
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:319:54
[INFO] [stdout]     |
[INFO] [stdout] 319 |       WorkerInnerInput::Bus(BusEvent::Channel(owner, channel, event)) => match (owner, event) {
[INFO] [stdout]     |                                                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_channel`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `now`
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:371:5
[INFO] [stdout]     |
[INFO] [stdout] 371 |     now: std::time::Instant,
[INFO] [stdout]     |     ^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_backend_by_task` is never used
[INFO] [stdout]   --> packages/media/src/runtime/store.rs:80:10
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl CallMediaStore {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 80 |   pub fn get_backend_by_task(&self, task_id: &TaskId) -> Option<&usize> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `switcher` and `shutdown` are never read
[INFO] [stdout]   --> packages/media/src/runtime/worker.rs:93:3
[INFO] [stdout]    |
[INFO] [stdout] 87 | pub struct RtpEngineMediaWorker {
[INFO] [stdout]    |            -------------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 93 |   switcher: TaskSwitcher,
[INFO] [stdout]    |   ^^^^^^^^
[INFO] [stdout] 94 |   shutdown: bool,
[INFO] [stdout]    |   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sans_io_runtime::backend`
[INFO] [stdout]  --> packages/media/src/runtime/store.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use sans_io_runtime::backend;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:214:15
[INFO] [stdout]     |
[INFO] [stdout] 214 |   ) -> Option<(WorkerInnerOutput<'a, OwnerType, ExtOut, ChannelId, RtpEvent, SCfg>)> {
[INFO] [stdout]     |               ^                                                                   ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 214 -   ) -> Option<(WorkerInnerOutput<'a, OwnerType, ExtOut, ChannelId, RtpEvent, SCfg>)> {
[INFO] [stdout] 214 +   ) -> Option<WorkerInnerOutput<'a, OwnerType, ExtOut, ChannelId, RtpEvent, SCfg> > {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:177:7
[INFO] [stdout]     |
[INFO] [stdout] 177 |       _ => WorkerInnerOutput::Ext(
[INFO] [stdout]     |       ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:177:7
[INFO] [stdout]     |
[INFO] [stdout] 140 |       MediaRpcCmd::Call(call_id, leg_id, sdp) => {
[INFO] [stdout]     |       --------------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 159 |       MediaRpcCmd::End(call_id) => {
[INFO] [stdout]     |       ------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 170 |       MediaRpcCmd::Ping => WorkerInnerOutput::Ext(
[INFO] [stdout]     |       ----------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 177 |       _ => WorkerInnerOutput::Ext(
[INFO] [stdout]     |       ^ collectively making this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `now`
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:265:23
[INFO] [stdout]     |
[INFO] [stdout] 265 |   fn spawn(&mut self, now: std::time::Instant, cfg: SCfg) {}
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cfg`
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:265:48
[INFO] [stdout]     |
[INFO] [stdout] 265 |   fn spawn(&mut self, now: std::time::Instant, cfg: SCfg) {}
[INFO] [stdout]     |                                                ^^^ help: if this is intentional, prefix it with an underscore: `_cfg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:290:7
[INFO] [stdout]     |
[INFO] [stdout] 273 |       WorkerInnerInput::Net(_owner, BackendIncoming::UdpListenResult { bind: _, result }) => match result {
[INFO] [stdout]     |       ----------------------------------------------------------------------------------- matches all the relevant values
[INFO] [stdout] ...
[INFO] [stdout] 290 |       WorkerInnerInput::Net(_owner, BackendIncoming::UdpListenResult { bind: _, result }) => match result {
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no value can reach this
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:338:9
[INFO] [stdout]     |
[INFO] [stdout] 337 |         ExtInput::Rpc(req) => Some(self.process_rpc_request(req)),
[INFO] [stdout]     |         ------------------ matches all the relevant values
[INFO] [stdout] 338 |         _ => None,
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `channel`
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:319:54
[INFO] [stdout]     |
[INFO] [stdout] 319 |       WorkerInnerInput::Bus(BusEvent::Channel(owner, channel, event)) => match (owner, event) {
[INFO] [stdout]     |                                                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_channel`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `now`
[INFO] [stdout]    --> packages/media/src/runtime/worker.rs:371:5
[INFO] [stdout]     |
[INFO] [stdout] 371 |     now: std::time::Instant,
[INFO] [stdout]     |     ^^^ help: if this is intentional, prefix it with an underscore: `_now`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_backend_by_task` is never used
[INFO] [stdout]   --> packages/media/src/runtime/store.rs:80:10
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl CallMediaStore {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 80 |   pub fn get_backend_by_task(&self, task_id: &TaskId) -> Option<&usize> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `switcher` and `shutdown` are never read
[INFO] [stdout]   --> packages/media/src/runtime/worker.rs:93:3
[INFO] [stdout]    |
[INFO] [stdout] 87 | pub struct RtpEngineMediaWorker {
[INFO] [stdout]    |            -------------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 93 |   switcher: TaskSwitcher,
[INFO] [stdout]    |   ^^^^^^^^
[INFO] [stdout] 94 |   shutdown: bool,
[INFO] [stdout]    |   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ng_control v0.1.0 (/opt/rustwide/workdir/packages/ng_control)
[INFO] [stderr]     Checking hyper v1.3.1
[INFO] [stdout] error: zero-sized fields in `repr(transparent)` cannot contain external non-exhaustive types
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/hyper-1.3.1/src/proto/h2/mod.rs:430:5
[INFO] [stdout]     |
[INFO] [stdout] 430 |     impossible: Impossible,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this field contains `Impossible`, which is not inhabited, and makes it not a breaking change to become non-zero-sized in the future.
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hyper` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "4f2d0eb76b7e63d2f02e32656577a05ea23c2b41f36798e78eabbf87a2a5a07b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f2d0eb76b7e63d2f02e32656577a05ea23c2b41f36798e78eabbf87a2a5a07b", kill_on_drop: false }`
[INFO] [stdout] 4f2d0eb76b7e63d2f02e32656577a05ea23c2b41f36798e78eabbf87a2a5a07b
