I'm still getting an internal compiler error on inline method after updating to Kotlin 1.2.10. Is this a known issue?

org.jetbrains.kotlin.codegen.CompilationException: Back-end (JVM) Internal error: Couldn't inline method call 'addTooltip' into
@org.junit.Test public final fun `should add Tooltip with init block`(): kotlin.Unit defined in ktx.scene2d.TooltipFactoriesTest

(...)

Cause: addTooltip$default (Lcom/badlogic/gdx/scenes/scene2d/Actor;Ljava/lang/String;Lcom/badlogic/gdx/scenes/scene2d/ui/Skin;Lcom/badlogic/gdx/scenes/scene2d/ui/TooltipManager;Lkotlin/jvm/functions/Function2;ILjava/lang/Object;)Lcom/badlogic/gdx/scenes/scene2d/ui/Tooltip;:
  @Lorg/jetbrains/annotations/NotNull;() // invisible

(...)

The root cause was thrown at: SMAPAndMethodNode.kt:38
	at org.jetbrains.kotlin.codegen.inline.InlineCodegen.throwCompilationException(InlineCodegen.kt:132)

@czyzby Are you using inline lambdas default values feature?

Yes. Without the

inline

keyword, the function works as expected.

So I already reported a similar error. Will make it public and will share you the link later

@czyzby What was the version of Kotlin before you have upgraded to 1.2.10?

It did not work in 1.2.0 as well. Adding default funtional parameters to an inline method broke it, I temporarily converted it to a non-inlined function. Without the default functional parameter, it worked as expected.

@ilya.gorbunov In my similar case, I got the issue on both 1.20 and 1.2.10