Set line marker on expect constructor '(' if no constructor keyword

idea/src/org/jetbrains/kotlin/idea/highlighter/markers/KotlinLineMarkerProvider.kt

@@ -298,7 +298,12 @@ private fun collectOverriddenPropertyAccessors(properties: Collection<KtNamedDec
 }
 
 private val KtNamedDeclaration.expectOrActualAnchor
-    get() = nameIdentifier ?: (this as? KtConstructor<*>)?.getConstructorKeyword() ?: this
+    get() =
+        nameIdentifier
+        ?: (this as? KtConstructor<*>)?.let {
+            it.getConstructorKeyword() ?: it.getValueParameterList()?.leftParenthesis
+        }
+        ?: this
 
 private fun collectActualMarkers(declaration: KtNamedDeclaration,
                                  result: MutableCollection<LineMarkerInfo<*>>) {

idea/testData/multiModuleLineMarker/fromExpectedAnnotation/common/common.kt

@@ -1,4 +1,4 @@
-expect annotation class <lineMarker>Ann</lineMarker> <lineMarker>constructor</lineMarker>(
+expect annotation class <lineMarker>Ann</lineMarker><lineMarker>(</lineMarker>
         val <lineMarker>x</lineMarker>: Int,
         val <lineMarker>y</lineMarker>: String
 )