Steps to reproduce

I'm not sure if this is sufficient to reproduce the problem or not, but here is what I did with my existing project:

1. Setup a multi-flavored (Dev, Prod) flutter project along with the associated Schemes in xcode. The Dev scheme supports debugging while the Prod scheme does not.
2. Upgrade to latest MacOS/XCode
3. Upgrade Flutter from 3.27.4 to 3.32.6
4. Build your app (Prod scheme that does not support debugging) that was previously "working fine".
5. Notice the error reported: "An error occurred when adding LLDB Init File: Exception: Failed to find correct customLLDBInitFile in LaunchAction for the Scheme in /Users/user/projects/flutter_app/ios/Runner.xcodeproj/xcshareddata/xcschemes/Prod.xcscheme."

Luckily, the Dev.xcscheme and Prod.xcscheme files are version controlled, so I can see that something made changes to the Dev.xcscheme but not the Prod.xcscheme. The <TestAction> element in the Dev.xcscheme file was modified (I don't know if this was by xcode or by flutter) such that it now contains the following attribute:

Before upgrade:

   <TestAction
      buildConfiguration = "Debug-Dev"
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
      shouldUseLaunchSchemeArgsEnv = "YES">
      <Testables>
      </Testables>
   </TestAction>

After upgrade

   <TestAction
      buildConfiguration = "Debug-Dev"
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
      customLLDBInitFile = "$(SRCROOT)/Flutter/ephemeral/flutter_lldbinit"
      shouldUseLaunchSchemeArgsEnv = "YES">
      <Testables>
      </Testables>
   </TestAction>

Similar changes were made to the <LaunchAction> element except the "selectedLauncherIdentifier" was also changed from Xcode.IDEFoundation.Launcher.PosixSpawn to Xcode.DebuggerFoundation.Launcher.LLDB and the customLLDBInitFile was also added. I don't include the LaunchAction snippets here for brevity, and to exclude project identifiers.

I'm not sure what caused this change to be made. I did not consciously or purposefully make this change. But, this change does cause me stupor of thought and questions. For example, Dev.xcsheme and Prod.xcscheme are committed to version control and now Dev.xcsheme references a resource that I have explicitly added to .gitignore (ie: Flutter/ephemeral/). Maybe I should not be doing that? flutter_lldbinit is an auto generated script (by flutter?) so should flutter_lldbinit be added or excluded from version control? Chat GPT suggests it should be excluded from version control, but it doesn't make sense to me to have Dev.xcsheme (which is version controlled) reference a resource that is excluded from version control. I guess I'm getting side tracked explaining some of my questions and confusion about this customLLDBInitFile configuration. I think it would be really helpful to have good documentation regarding these settings and explicitly stating what should and should not be included in version control.

But, back to this issue. My Prod.xcscheme does not support debugging. That should be optimized for production. So, why does the tool (https://github.com/flutter/flutter/blob/master/packages/flutter_tools/lib/src/migrations/lldb_init_migration.dart#L229) require the customLLDBInitFile for a shared scheme that does not enable debugging?

Expected results

Build your app (Prod scheme that does not support debugging) successfully without reporting that "An error occurred when adding LLDB Init File...".

Should the LLDB Init File be part of the build process if the scheme does not have debugging enabled?

Actual results

An error occurred when adding LLDB Init File:
Exception: Failed to find correct customLLDBInitFile in LaunchAction for the Scheme in /Users/user/projects/flutter_app/ios/Runner.xcodeproj/xcshareddata/xcschemes/Prod.xcscheme.

Code sample

N/A

Screenshots or Video

Logs

N/A

Flutter Doctor output

[✓] Flutter (Channel stable, 3.32.6, on macOS 15.5 24F74 darwin-arm64, locale en-US) [403ms]
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[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0) [1,121ms]
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    • Java version OpenJDK Runtime Environment Temurin-17.0.13+11 (build 17.0.13+11)
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[✓] Xcode - develop for iOS and macOS (Xcode 16.4) [759ms]
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 16F6
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[✓] Chrome - develop for the web [79ms]
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[✓] Android Studio (version 2025.1) [79ms]
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    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
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      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 21.0.6+-13391695-b895.109)

[✓] IntelliJ IDEA Ultimate Edition (version 2025.1.3) [78ms]
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    • Flutter plugin version 86.0.2
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<redacted>

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