UAST: Fix for unsafe cast for class initializer (EA-109918)

plugins/uast-kotlin/src/org/jetbrains/uast/kotlin/KotlinAbstractUElement.kt

@@ -103,7 +103,7 @@ fun doConvertParent(element: UElement, parent: PsiElement?): UElement? {
     if (parent is KtClassInitializer) {
         val containingClass = parent.containingClassOrObject
         if (containingClass != null) {
-            val containingUClass = KotlinUastLanguagePlugin().convertElementWithParent(containingClass, null) as KotlinUClass?
+            val containingUClass = KotlinUastLanguagePlugin().convertElementWithParent(containingClass, null) as? KotlinUClass
             containingUClass?.methods?.filterIsInstance<KotlinPrimaryConstructorUMethod>()?.firstOrNull()?.let {
                 return it.uastBody
             }

plugins/uast-kotlin/tests/KotlinDetachedUastTest.kt

@@ -74,6 +74,23 @@ class KotlinDetachedUastTest : KotlinLightCodeInsightFixtureTestCase() {
 
     }
 
+    fun testLiteralInClassInitializerFromFactory() {
+
+        val detachedClass = KtPsiFactory(project).createClass("""
+        class MyAnnotation(){
+            init {
+                "default"
+            }
+        }
+        """)
+
+        val literalInside = detachedClass.findUElementByTextFromPsi<UElement>("default")
+        generateSequence(literalInside, { it.uastParent }).count().let {
+            TestCase.assertTrue("it should have some parents $it actually", it > 1)
+        }
+
+    }
+
 }
 
 fun <T> T?.orFail(msg: String): T = this ?: error(msg)