A little fix to allow Wrapped and non-Wrapped descriptors to coexist.

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/inline/DeepCopyIrTreeWithDescriptors.kt

@@ -90,7 +90,7 @@ internal class DeepCopyIrTreeWithSymbolsForInliner(val context: Context,
             }
 
             override fun visitField(declaration: IrField) {
-                (declaration.descriptor as WrappedFieldDescriptor).bind(declaration)
+                (declaration.descriptor as? WrappedFieldDescriptor)?.bind(declaration)
                 declaration.acceptChildrenVoid(this)
             }
 
@@ -1085,4 +1085,4 @@ internal class DescriptorSubstitutorForExternalScope(
 
         return oldExpression.shallowCopy(oldExpression.origin, createFunctionSymbol(newDescriptor), oldExpression.superQualifierSymbol)
     }
-}
+}