I’m getting a very weird and painful exception while trying to execute tests both with eap-11 and eap-33:

java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.collections.CollectionsKt__IterablesKt.collectionSizeOrDefault, parameter $receiver

	at kotlin.collections.CollectionsKt__IterablesKt.collectionSizeOrDefault(Iterables.kt)
	at my.code.SomeClass.method(deserializers.kt:439)
        ...

click on

deserializers.kt:439

->

Inline function call site

shows me

deserializert.kt:107

, which is

someMap.map { (_, value) ->

. Click on

Inline function body

passes me to

Iterable.map

function source (which really contains a call to

collectionSizeOrDefault

), but both Cmd+click on

.map {

and bytecode show me that

Map.map

function should be / was actually inlined, and it does not contain any calls to

collectionSizeOrDefault

. 🙀

@miha-x64 Please file issue with code snippet/sample

@max.kammerer I’d be glad to do so, but I’m unable to reproduce it from scratch, in a new clean project.