Issue 1:
Log:

Resolving dependencies...

Gradle task 'assembleDebug'...

Built build\app\outputs\apk\debug\app-debug.apk.

#timeout waiting for the application to start

#23861

Syncing files to device GT I9300...

I/Process (27308): Sending signal. PID: 27308 SIG: 9

Lost connection to device.

PLEASE HELP ME!!

Issue 2:
Steps to Reproduce

The following may be dependent on the dev machine, but I have no way to test. The following happens on my MacBook Pro (Retina, 15-inch, Mid 2014).

Open Android Studio (v3.2.1, with Flutter plugin 29.1.1 and Dart plugin 181.5656).

Create new Flutter app

Open iOS Simulator.

Debug/Run the app in the Simulator

The debug log shows the following:

Note that the "timeout waiting for the application to start" is red. It stays there for at least a few seconds (probably tens of seconds) before the build finishes, and the next line is printed out.

After that, everything works just fine.

I'm filing this mostly because I've seen this happen to newcomers during codelabs, and they (understandably) assume that the build failed and they should just stop it.

Logs

Launching lib/main.dart on iPhone X in debug mode...
Running pod install...
Starting Xcode build...
timeout waiting for the application to start
Xcode build done. 127.6s
Syncing files to device iPhone X...
[C1.1 E9C3A58A-EFF3-459E-A2C8-C1D461C3C624 192.168.0.14:54760<->172.217.23.202:443]
Connected Path: satisfied (Path is satisfied), interface: en0
Duration: 120.981s, DNS @0.003s took 0.018s, TCP @0.024s took 0.012s, TLS took 0.170s
bytes in/out: 3306/1028, packets in/out: 9/9, rtt: 0.025s, retransmitted packets: 0, out-of-order packets: 0
[C2.1 E0EF4920-9679-45B3-8EDE-B64A67A08769 192.168.0.14:54785<->216.58.201.110:443]
Connected Path: satisfied (Path is satisfied), interface: en0
Duration: 120.488s, DNS @0.000s took 0.001s, TCP @0.003s took 0.010s, TLS took 0.108s
bytes in/out: 3876/1023, packets in/out: 10/9, rtt: 0.022s, retransmitted packets: 1, out-of-order packets: 0
[C3.1 9B325582-F53A-415B-8FAF-BBAFC43598B7 192.168.0.14:54786<->216.58.201.110:443]
Connected Path: satisfied (Path is satisfied), interface: en0
Duration: 121.090s, DNS @0.000s took 0.002s, TCP @0.004s took 0.015s, TLS took 0.121s
bytes in/out: 3588/1165, packets in/out: 9/9, rtt: 0.026s, retransmitted packets: 0, out-of-order packets: 0
[...]

$ flutter analyze
Analyzing baby_names...
No issues found! (ran in 2.7s)

$ flutter doctor -v
[✓] Flutter (Channel beta, v0.9.4, on Mac OS X 10.13.6 17G65, locale en-US)
• Flutter version 0.9.4 at /Users/filiph/dev/flutter
• Framework revision f37c235c32 (5 weeks ago), 2018-09-25 17:45:40 -0400
• Engine revision 74625aed32
• Dart version 2.1.0-dev.5.0.flutter-a2eb050044

[✓] Android toolchain - develop for Android devices (Android SDK 28.0.3)
• Android SDK at /Users/filiph/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_152-release-1136-b06)
• All Android licenses accepted.

[✓] iOS toolchain - develop for iOS devices (Xcode 10.0)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 10.0, Build version 10A255
• ios-deploy 1.9.2
• CocoaPods version 1.5.3

[✓] Android Studio (version 3.2)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 29.1.1
• Dart plugin version 181.5656
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)

[!] IntelliJ IDEA Community Edition (version 2018.1)
• IntelliJ at /Applications/IntelliJ IDEA CE.app
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
• For information about installing plugins, see
https://flutter.io/intellij-setup/#installing-the-plugins

[✓] VS Code (version 1.28.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 2.19.0

[✓] Connected devices (1 available)
• iPhone X • A4DBE660-4C39-4AEA-B258-7755F584BA6E • ios • iOS 12.0 (simulator)

! Doctor found issues in 1 category.