Fix audio engine node detach crash

LiveKitClient.podspec

@@ -14,7 +14,7 @@ Pod::Spec.new do |spec|
 
   spec.source_files = "Sources/**/*"
 
-  spec.dependency("LiveKitWebRTC", "= 125.6422.22")
+  spec.dependency("LiveKitWebRTC", "= 125.6422.24")
   spec.dependency("SwiftProtobuf")
   spec.dependency("Logging", "= 1.5.4")
   spec.dependency("DequeModule", "= 1.1.4")

Package.swift

@@ -18,7 +18,7 @@ let package = Package(
     ],
     dependencies: [
         // LK-Prefixed Dynamic WebRTC XCFramework
-        .package(url: "https://github.com/livekit/webrtc-xcframework.git", exact: "125.6422.22"),
+        .package(url: "https://github.com/livekit/webrtc-xcframework.git", exact: "125.6422.24"),
         .package(url: "https://github.com/apple/swift-protobuf.git", from: "1.26.0"),
         .package(url: "https://github.com/apple/swift-log.git", from: "1.5.4"),
         .package(url: "https://github.com/apple/swift-collections.git", from: "1.1.0"),

Package@swift-5.9.swift

@@ -20,7 +20,7 @@ let package = Package(
     ],
     dependencies: [
         // LK-Prefixed Dynamic WebRTC XCFramework
-        .package(url: "https://github.com/livekit/webrtc-xcframework.git", exact: "125.6422.22"),
+        .package(url: "https://github.com/livekit/webrtc-xcframework.git", exact: "125.6422.24"),
         .package(url: "https://github.com/apple/swift-protobuf.git", from: "1.26.0"),
         .package(url: "https://github.com/apple/swift-log.git", from: "1.6.2"), // 1.6.x requires Swift >=5.8
         .package(url: "https://github.com/apple/swift-collections.git", from: "1.1.0"),

Tests/LiveKitTests/AudioEngineTests.swift

@@ -343,6 +343,25 @@ class AudioEngineTests: LKTestCase {
             try? await Task.sleep(nanoseconds: 1 * 100_000_000) // 10ms
         }
     }
+
+    func testFailingPublish() async throws {
+        AudioManager.shared.set(engineObservers: [FailingEngineObserver()])
+        // Should fail
+        // swiftformat:disable redundantSelf hoistAwait
+        await XCTAssertThrowsErrorAsync(try await withRooms([RoomTestingOptions(canPublish: true)]) { rooms in
+            print("Publishing mic...")
+            try await rooms[0].localParticipant.setMicrophone(enabled: true)
+        })
+    }
+}
+
+final class FailingEngineObserver: AudioEngineObserver {
+    var next: (any LiveKit.AudioEngineObserver)?
+
+    func engineWillEnable(_: AVAudioEngine, isPlayoutEnabled _: Bool, isRecordingEnabled _: Bool) -> Int {
+        // Fail
+        -4101
+    }
 }
 
 final class SineWaveNodeHook: AudioEngineObserver {

Tests/LiveKitTests/Support/Xcode14.2Backport.swift

@@ -17,6 +17,15 @@
 import Foundation
 import XCTest
 
+func XCTAssertThrowsErrorAsync(_ expression: @autoclosure () async throws -> some Any) async {
+    do {
+        _ = try await expression()
+        XCTFail("No error was thrown.")
+    } catch {
+        // Pass
+    }
+}
+
 // Support iOS 13
 public extension URLSession {
     func downloadBackport(from url: URL) async throws -> (URL, URLResponse) {