Workaround copied kotlin element happened to be outside the KtFile

Can be reproduced after revert with
IdeLightClassTestGenerated$Local.testDollarsInNameLocal test.

compiler/light-classes/src/org/jetbrains/kotlin/asJava/classes/KtLightClassForLocalDeclaration.kt

@@ -35,9 +35,12 @@ open class KtLightClassForLocalDeclaration(
         KotlinClassInnerStuffCache(
             this,
             with(KotlinModificationTrackerService.getInstance(classOrObject.project)) {
-                listOf(
-                    outOfBlockModificationTracker, fileModificationTracker(classOrObject.containingKtFile)
-                )
+                val file = classOrObject.containingFile
+                if (file is KtFile) {
+                    listOf(outOfBlockModificationTracker, fileModificationTracker(file))
+                } else {
+                    listOf(outOfBlockModificationTracker)
+                }
             }
         )
 

compiler/psi/src/org/jetbrains/kotlin/psi/KtElementImplStub.java

@@ -67,7 +67,8 @@ public class KtElementImplStub<T extends StubElement<?>> extends StubBasedPsiEle
     @Override
     public KtFile getContainingKtFile() {
         PsiFile file = getContainingFile();
-        if(!(file instanceof KtFile))  {
+        if (!(file instanceof KtFile)) {
+            // KtElementImpl.copy() might be the reason for this exception
             String fileString = file.isValid() ? file.getText() : "";
             throw new IllegalStateException("KtElement not inside KtFile: " + file + fileString +
                                             "for element " + this + " of type " + this.getClass() + " node = " + getNode());