Task ':explodeCodeSource' uses this output of task ':kspKotlin' without declaring an explicit or implicit dependency

[Mrkchv]

Plugin version
1.31.0

Gradle version
8.4

JDK version
17

Kotlin and Kotlin Gradle Plugin (KGP) version
1.9.20

Android Gradle Plugin (AGP) version
8.3.2

Describe the bug
After bumping to 1.31.0 we get this error:

FAILURE: Build failed with an exception.

* What went wrong:
Some problems were found with the configuration of task ':app:kspGoogleDebugKotlin' (type 'KspTaskJvm').
  - Gradle detected a problem with the following location: '/Users/Developer/StudioProjects/mobilebank-android/app/build/generated/ksp/googleDebug'.
    
    Reason: Task ':app:explodeCodeSourceGoogleDebug' uses this output of task ':app:kspGoogleDebugKotlin' without declaring an explicit or implicit dependency. This can lead to incorrect results being produced, depending on what order the tasks are executed.
    
    Possible solutions:
      1. Declare task ':app:kspGoogleDebugKotlin' as an input of ':app:explodeCodeSourceGoogleDebug'.
      2. Declare an explicit dependency on ':app:kspGoogleDebugKotlin' from ':app:explodeCodeSourceGoogleDebug' using Task#dependsOn.
      3. Declare an explicit dependency on ':app:kspGoogleDebugKotlin' from ':app:explodeCodeSourceGoogleDebug' using Task#mustRunAfter.
    
For more information, please refer to https://docs.gradle.org/8.4/userguide/validation_problems.html#implicit_dependency in the Gradle documentation.

We can specify the dependency of the :explodeCodeSource task on :kspKotlin as follows and it will work:

allprojects.forEach { project ->
        project.tasks.withType<CodeSourceExploderTask>().configureEach {
            dependsOn(*project.tasks.withType<KspTaskJvm>().toTypedArray())
        }
}

Before bumping to 1.31.0 we used 1.25.0 and did not get the error. The error occurs on versions higher than 1.29.0.

[autonomousapps]

Thanks for the issue. Do you have a minimal reproducer?

[Mrkchv]

@autonomousapps Unfortunately I cannot share the code of our project. I also tried to make a test project, but I didn't get the error. Perhaps the logs will be useful project_health_debug_log.txt.zip

[autonomousapps]

My working assumption is that this is another instance of this Gradle bug, except that you say this only appears on 1.30.0 and higher. A reproducer would be very useful.