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I'm using the latest Android Studio (H) and I can see the root cause being displayed (" Kotlin reflection implementation is not found at runtime. Make sure you have kotlin-reflect.jar in the classpath")

I can see you were using Flamingo by the time of the report. Can you please confirm you observe the same behavior in newer Android Studio versions? Thanks!

I just tried on Hedgehog canary 7 using the repro project I attached above (I just changed AGP to 8.2.0-alpha07) and I still have the same experience.

The IDE preview fails, with a message saying "There was problem to load the PreviewParameterProvider defined. Please double-check its constructor and the values property implementation. The IDE logs should contain the full exception stack trace." (Screenshot attached)

If I check the logs there is nothing about kotlin reflection missing, all I see is the stacktrace below.

Additionally, the kotlin reflect library definitely is included as an implementation dependency of this module in my repro project, so it should not be missing regardless. It looks like in the screenshot you shared you are not using my exact repro project?

com.example.composepreviewbugrepro.DataPreviewParameterProvider.$FailToLoadPreviewParameterProvider
java.lang.NoSuchMethodException: com.example.composepreviewbugrepro.DataPreviewParameterProvider.$FailToLoadPreviewParameterProvider
	at androidx.compose.ui.tooling.ComposableInvoker.findComposableMethod(ComposableInvoker.kt:83)
	at androidx.compose.ui.tooling.ComposableInvoker.invokeComposable(ComposableInvoker.kt:190)
	at androidx.compose.ui.tooling.ComposeViewAdapter$init$3$1$composable$1.invoke(ComposeViewAdapter.kt:711)
	at androidx.compose.ui.tooling.ComposeViewAdapter$init$3$1$composable$1.invoke(ComposeViewAdapter.kt:709)
	at androidx.compose.ui.tooling.ComposeViewAdapter$init$3$1.invoke(ComposeViewAdapter.kt:746)
	at androidx.compose.ui.tooling.ComposeViewAdapter$init$3$1.invoke(ComposeViewAdapter.kt:704)
	at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:107)
	at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.jvm.kt:34)
	at androidx.compose.runtime.CompositionLocalKt.CompositionLocalProvider(CompositionLocal.kt:228)

Another reflection issue, probably adjacent (ignore if it's off topic). This code:

  class MyClass {
      var m1 = 1
      var m2 = 2
  }
  
  @Preview()
  @Composable
  fun PropertyEditorPreview() {
      var instance = remember {
          MyClass()
      }
      Surface {
          Column {
  
              instance::class.members.forEach {
                  if (it is KProperty1<*, *>) {
                      Text("${it.getter.call(instance)})
                  }
              }
          }
      }
  }

Yields this exception:

  java.lang.IllegalAccessException: class _layoutlib_._internal_.kotlin.reflect.jvm.internal.calls.CallerImpl$FieldGetter cannot access a member of class MyClass with modifiers "private" 
  at jdk.internal.reflect.Reflection.newIllegalAccessException(Reflection.java:392)
  at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:674)
  at java.lang.reflect.Field.checkAccess(Field.java:1102)
  at java.lang.reflect.Field.get(Field.java:423) 
  at _layoutlib_._internal_.kotlin.reflect.jvm.internal.calls.CallerImpl$FieldGetter.call(CallerImpl.kt:161) 
  at _layoutlib_._internal_.kotlin.reflect.jvm.internal.KCallableImpl.call(KCallableImpl.kt:107)
  ...

Is there any update on this bug? It has been many months and this is preventing my company from using Compose previews for a core part of our workflow with our internal framework.

Thanks for following up. Unfortunately, our team is extremely busy and our backlog for this quarter is full. I'll make sure to add this and the other PreviewParameter related issues for our Q2 backlog. As there is no promise that these issues will be fixed, they'll certainly be looked at and investigated. Thanks!

Hi, Is there any progress on this? My lib, kotlin-faker, is affected due to same issue that's mentioned in comment#5

Hi. No progress yet, but we're planning to at least start an investigation this quarter. We'll keep you posted.

Thank you for your patience while our engineering team worked to resolve this issue. A fix for this issue is now available in:

• Android Studio Meerkat | 2024.3.1 Canary 3
• Android Gradle Plugin 8.9.0-alpha03

We encourage you to try the latest update.

If you notice further issues or have questions, please file a new bug report.

Thank you for taking the time to submit feedback — we really appreciate it!