Repository: flutter
Issue: flutter run stuck on "Installing and launching" if the iOS app crashes on launch
Labels: platform-ios,tool,P3,team-ios,triaged-ios

## Steps to Reproduce

1. `flutter create test_run`
2. Replace `ios/Runner/AppDelegate.swift` with asserting code:
```swift
import UIKit
import Flutter

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?
  ) -> Bool {
    GeneratedPluginRegistrant.register(with: self)
    assert(false, "Crashing for no reason");
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
}
```
3. `flutter run -d <>`

See the app crash on the device but `flutter run` never exits and is stuck on "Installing and launching".

## Logs

```
$ flutter run -d d83d5bc53967baa0ee18626ba87b6254b2ab5418 
Launching lib/main.dart on Flutter iOS Device in debug mode...
Automatically signing iOS for device deployment using specified development team in Xcode project: S8QB4VV633
Running pod install...                                              1.8s
Running Xcode build...                                                  
                                                   
 ├─Assembling Flutter resources...                           2.7s
 └─Compiling, linking and signing...                         6.8s
Xcode build done.                                           12.8s
Installing and launching...                                            ⣯
```

```
$ flutter doctor -v
[✓] Flutter (Channel master, v1.12.1-pre.59, on Mac OS X 10.14.6 18G87, locale en-US)
    • Flutter version 1.12.1-pre.59 at /Users/m/Projects/flutter
    • Framework revision 6cb6857f92 (2 hours ago), 2019-11-14 16:50:17 -0500
    • Engine revision 77c3512ec8
    • Dart version 2.7.0

 
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    • Android SDK at /Users/m/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.2)
    • Xcode at /Users/m/Applications/Xcode-11_2.app/Contents/Developer
    • Xcode 11.2, Build version 11B41
    • CocoaPods version 1.8.4

[✓] Android Studio (version 3.5)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 40.2.2
    • Dart plugin version 191.8593
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)

[✓] IntelliJ IDEA Community Edition (version 2019.2.3)
    • IntelliJ at /Applications/IntelliJ IDEA CE.app
    • Flutter plugin version 41.1.3
    • Dart plugin version 192.7402

[✓] VS Code (version 1.39.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.6.0

[✓] Connected device (2 available)
    • Flutter iOS Device • d83d5bc53967baa0ee18626ba87b6254b2ab5418 • ios • iOS 13.1.3
    • iPhone 11 Pro Max  • 389148FB-E436-4F8B-B37A-8564AF1627C0     • ios • com.apple.CoreSimulator.SimRuntime.iOS-13-2 (simulator)

• No issues found!
```