[iOS] ProcessException when stopping app on simulator: "Process exited abnormally with exit code -2"

[khusantoy]

Description

When stopping a Flutter app running on iOS simulator from Android Studio, I get a ProcessException error, even though the app stops successfully.

Steps to Reproduce

1. Open project in Android Studio
2. Run Flutter app on iOS simulator
3. Click Stop button in Android Studio
4. Error appears in console

Expected Behavior

App should stop without showing error message

Actual Behavior

App stops successfully but shows ProcessException error:

Error: Unable to terminate uz.nextbrain.fitcityapp on 24DDCCF7-6C7D-498B-94FC-8142468288EE:
ProcessException: Process exited abnormally with exit code -2:
  Command: /usr/bin/arch -arm64e xcrun simctl terminate 24DDCCF7-6C7D-498B-94FC-8142468288EE uz.nextbrain.fitcityapp

Environment

Flutter version: Flutter 3.38.4 • channel stable • https://github.com/flutter/flutter.git
Framework • revision 66dd93f9a2 (6 days ago) • 2025-12-03 14:56:10 -0800
Engine • hash 360877569ab6632a564a0a8a815b2e0fe5ae294a (revision a5cb96369e) (5 days ago) • 2025-12-03 20:56:06.000Z
Tools • Dart 3.10.3 • DevTools 2.51.1
Android Studio version: Android Studio Otter 2 Feature Drop | 2025.2.2
macOS version: macOS Tahoe 26.1
Xcode version: Xcode 26.1.1

Run: flutter doctor -v and paste output here:

[✓] Flutter (Channel stable, 3.38.4, on macOS 26.1 25B78 darwin-arm64, locale en-UZ) [469ms]
    • Flutter version 3.38.4 on channel stable at /Users/xusanboytursunov/development/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 66dd93f9a2 (6 days ago), 2025-12-03 14:56:10 -0800
    • Engine revision a5cb96369e
    • Dart version 3.10.3
    • DevTools version 2.51.1
    • Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop, enable-windows-desktop, enable-android, enable-ios, cli-animations, enable-native-assets,
      omit-legacy-version-file, enable-lldb-debugging

[✓] Android toolchain - develop for Android devices (Android SDK version 36.1.0-rc1) [2.5s]
    • Android SDK at /Users/xusanboytursunov/Library/Android/sdk
    • Emulator version 36.3.10.0 (build_id 14472402) (CL:N/A)
    • Platform android-36.1, build-tools 36.1.0-rc1
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
      This is the JDK bundled with the latest Android Studio installation on this machine.
      To manually set the JDK path, use: `flutter config --jdk-dir="path/to/jdk"`.
    • Java version OpenJDK Runtime Environment (build 21.0.8+-14196175-b1038.72)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 26.1.1) [995ms]
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 17B100
    • CocoaPods version 1.16.2

[✓] Chrome - develop for the web [5ms]
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Connected device (5 available) [9.3s]
    • iPhone D (wireless) (mobile)        • 00008130-001C61D02138001C            • ios            • iOS 26.1 23B85
    • I.S.K.A.N.D.A.R (wireless) (mobile) • 00008030-000A68513AC3402E            • ios            • iOS 26.1 23B85
    • iPhone 17 Pro Max (mobile)          • 24DDCCF7-6C7D-498B-94FC-8142468288EE • ios            • com.apple.CoreSimulator.SimRuntime.iOS-26-1 (simulator)
    • macOS (desktop)                     • macos                                • darwin-arm64   • macOS 26.1 25B78 darwin-arm64
    • Chrome (web)                        • chrome                               • web-javascript • Google Chrome 143.0.7499.41
    ! Error: Browsing on the local area network for iPhoneB 16. Ensure the device is unlocked and attached with a cable or associated with the same local area network as this Mac.
      The device must be opted into Developer Mode to connect wirelessly. (code -27)
    ! Error: Browsing on the local area network for iPhoneB. Ensure the device is unlocked and attached with a cable or associated with the same local area network as this Mac.
      The device must be opted into Developer Mode to connect wirelessly. (code -27)

[✓] Network resources [496ms]
    • All expected network resources are available.

• No issues found!

Additional Context

• This happens consistently when stopping the app
• App functions normally otherwise
• The error appears to be related to the terminate command trying to stop an already stopped process
• Issue occurs on iOS simulator only

Possible Cause

It seems like Android Studio/Flutter tools might be trying to terminate the app twice, or the app is already stopped when the terminate command runs.