App crash on iOS versions 18.3.4 and below when using gma_mediation_pangle with iOS Deployment Target set to 15

[khjde1207]

[REQUIRED] Step 1: Describe your environment

Plugin Version

This issue occurs on iOS versions 18.4 and below. It does not occur on version 18.5 (latest version).
This issue has not been observed on simulators and only occurs on actual devices.

Plugin Versions

flutter --version :

Flutter 3.29.2 • channel stable • [https://github.com/flutter/flutter.git](https://www.google.com/url?sa=E&q=https%3A%2F%2Fgithub.com%2Fflutter%2Fflutter.git)
Framework • revision c236373904 (4 weeks ago) • 2025-03-13 16:17:06 -0400
Engine • revision 18b71d647a
Tools • Dart 3.7.2 • DevTools 2.42.3

Plugin Version :

google_mobile_ads: ^5.3.1
gma_mediation_pangle: ^2.1.0

[REQUIRED] Step 2: Describe the problem

Steps to Reproduce

I am using gma_mediation_meta, gma_mediation_applovin, and gma_mediation_pangle through mediation.
This issue only occurs with gma_mediation_pangle.

To find this error, I meticulously removed dozens of dependencies one by one and discovered that adding gma_mediation_pangle causes the app to crash.

Subsequently, I compared the configurations with a newly created project step by step and found that the issue is related to the iOS Deployment Target version.

1. flutter create test

2. edit pubspec.yaml

google_mobile_ads: ^5.3.1
gma_mediation_pangle: ^2.1.0

3. cd ios && pod install

4. edit info.plist
   https://developers.google.com/ad-manager/mobile-ads-sdk/ios/quick-start?hl=ko#update_your_infoplist
   add GADApplicationIdentifier

5. open in xcode - Runner(project) - Build Settings - iOS Deployment Target - edit iOS 15

6. run

7. You can observe that the app crashes. When running in debug mode, you can check the error location in Xcode.

8. When running in release mode, you will see a crash due to termination.

[✓] Flutter (Channel stable, 3.29.2, on macOS 15.4 24E248 darwin-arm64, locale ko-KR) [380ms]
    • Flutter version 3.29.2 on channel stable at /Users/khjde/development/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision c236373904 (4 weeks ago), 2025-03-13 16:17:06 -0400
    • Engine revision 18b71d647a
    • Dart version 3.7.2
    • DevTools version 2.42.3

[✗] Android toolchain - develop for Android devices [315ms]
    • Android SDK at /Users/khjde/Library/Android/sdk
    ✗ cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.

[!] Xcode - develop for iOS and macOS (Xcode 16.3) [1,990ms]
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 16E140
    ! CocoaPods 1.15.2 out of date (1.16.2 is recommended).
        CocoaPods is a package manager for iOS or macOS platform code.
        Without CocoaPods, plugins will not work on iOS or macOS.
        For more info, see https://flutter.dev/to/platform-plugins
      To update CocoaPods, see https://guides.cocoapods.org/using/getting-started.html#updating-cocoapods

[✓] Chrome - develop for the web [10ms]
    • Chrome at /Applications/Google [Chrome.app/Contents/MacOS/Google](http://chrome.app/Contents/MacOS/Google) Chrome

[!] Android Studio (not installed) [9ms]
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/to/macos-android-setup for detailed instructions).

[✓] VS Code (version 1.99.0) [9ms]
    • VS Code at /Applications/Visual Studio [Code.app/Contents](http://code.app/Contents)
    • Flutter extension version 3.108.0

[✓] Connected device (4 available) [6.3s]
    • 홍현준의 iPhone (mobile)            • 00008030-000949111A63802E • ios            • iOS 18.3.2 22D82
    • macOS (desktop)                 • macos                     • darwin-arm64   • macOS 15.4 24E248 darwin-arm64
    • Mac Designed for iPad (desktop) • mac-designed-for-ipad     • darwin         • macOS 15.4 24E248 darwin-arm64
    • Chrome (web)                    • chrome                    • web-javascript • Google Chrome 135.0.7049.42

[✓] Network resources [492ms]
    • All expected network resources are available.

[malandr2]

Hi @khjde1207, I'm unable to replicate this using our mediation_example and adding gma_mediation_pangle: ^2.1.0 to the project. I can run the project just fine. I'm using Xcode version 16.2.

Are you able to replicate using our example project?

[khjde1207]

Hello,
I am unable to reproduce the issue in the mediation_example project. I have compared it with a newly created project, but I haven't been able to identify any differences.

https://github.com/khjde1207/pangle_test

This project was created using Flutter version 3.29.2 with a fresh flutter create, and I only added the ad functionality and modified the SDK version.
My Xcode version is 16.3.
If the issue is not reproducible with the provided project, it might be related to the Xcode version.
The app build deployed in March worked fine, but this issue is occurring only in the app versions deployed around April 7th. Xcode was automatically updated in early April.

Thank you.

[malandr2]

ACK. It's possible it's related to Xcode version. Suggest to pry more into that. At this time closing this out as we've determined it's not something that can be directly addressed in the google_mobile_ads flutter plugin our the mediation plugins. Thanks!