Data.isNull return invalid true after proguard

[MiguelAngelLV]

Environment details

1. Kotlin Multiplatform Project
2. Compose Multiplatform
3. Youtube API

Steps to reproduce

1. Configure Youtube API
2. Create request a videos list using setMine(true)
3. Apply proguard/r8
4. Get error

Code example

// example

Stack trace

Field: mine , value: true, isNull: true
Field: part, value [contentDetails], isNull: false

Generated URL: https://youtube.googleapis.com/youtube/v3/channels?part=contentDetails


Exception in thread "AWT-EventQueue-0" com.google.api.client.googleapis.json.GoogleJsonResponseException: 400 Bad Request
GET https://youtube.googleapis.com/youtube/v3/channels?part=contentDetails
{
  "code": 400,
  "errors": [
    {
      "domain": "youtube.parameter",
      "location": "parameters.",
      "locationType": "other",
      "message": "No filter selected. Expected one of: mySubscribers, forUsername, forHandle, categoryId, id, mine, managedByMe",
      "reason": "missingRequiredParameter"
    }
  ],
  "message": "No filter selected. Expected one of: mySubscribers, forUsername, forHandle, categoryId, id, mine, managedByMe"
}
	at com.google.api.client.googleapis.json.GoogleJsonResponseException.from(GoogleJsonResponseException.java:145)
	at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError(AbstractGoogleJsonClientRequest.java:118)
	at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError(AbstractGoogleJsonClientRequest.java:37)
	at com.google.api.client.googleapis.services.AbstractGoogleClientRequest$3.interceptResponse(AbstractGoogleClientRequest.java:479)
	at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:1111)
	at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:565)
	at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:506)
	at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:616)
	at org.malv.youtube.services.YoutubeService$getVideos$2.invokeSuspend(YoutubeService.kt:49)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:100)
	at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:124)
	at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:89)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:586)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:1820)
	Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [StandaloneCoroutine{Cancelling}@38fc853c, Dispatchers.Main.immediate]

External references such as API reference guides

isNull method

public static boolean isNull(Object object) { // don't call nullOf because will throw IllegalArgumentException if cannot create instance 
   return object != null && object == NULL_CACHE.get(object.getClass()); 
}

Any additional information below

I think the problem is that, after ProGuard, Boolean object is converted to primitives, so, "true" are the same object in NULL_CACHE and it return isNull. If the value is "false" return that is not null.

[diegomarquezp]

Hi @MiguelAngelLV, thanks for reporting this issue and the steps to reproduce. Would you mind enhancing your reproduction steps by providing a simple snippet or project to demonstrate the failure?

Additionally, the error proposes a missing filter field. How are you setting this in your code?

Also, please note that for fast response times, you can refer to our Support Hub if you have a support plan with Google Cloud.

[MiguelAngelLV]

A simple way to check if:

if (Data.NULL_BOOLEAN === true)
     println("Equals: Proguard")
else
     println("Not equals, no proguard")

I set the filter with:

        val channels = youtube.channels()
            .list(listOf("contentDetails"))
            .setMine(true) // This value
            .execute()
            .items

My actual workaround is a horrible fix but it works...

    fun init {
        runCatching {
            val dataClass = Class.forName("com.google.api.client.util.Data")
            val nullCacheField: Field = dataClass.getDeclaredField("NULL_CACHE")
            nullCacheField.isAccessible = true
            val nullCache = nullCacheField.get(null) as ConcurrentHashMap<*, *>
            nullCache.clear()
        }
    }