IR. Create IrAnonymousInitializerSymbolImpl using a class symbol

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/MoveCompanionObjectFieldsLowering.kt

@@ -107,7 +107,7 @@ class MoveCompanionObjectFieldsLowering(val context: CommonBackendContext) : Cla
     ): IrAnonymousInitializer =
         with(oldInitializer) {
             IrAnonymousInitializerImpl(
-                startOffset, endOffset, origin, IrAnonymousInitializerSymbolImpl(newParent.descriptor),
+                startOffset, endOffset, origin, IrAnonymousInitializerSymbolImpl(newParent.symbol),
                 isStatic = true
             ).apply {
                 parent = newParent

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/symbols/impl/IrSymbolBase.kt

@@ -62,7 +62,9 @@ class IrExternalPackageFragmentSymbolImpl(descriptor: PackageFragmentDescriptor)
 
 class IrAnonymousInitializerSymbolImpl(descriptor: ClassDescriptor) :
     IrBindableSymbolBase<ClassDescriptor, IrAnonymousInitializer>(descriptor),
-    IrAnonymousInitializerSymbol
+    IrAnonymousInitializerSymbol {
+    constructor(irClassSymbol: IrClassSymbol) : this(irClassSymbol.descriptor) {}
+}
 
 class IrClassSymbolImpl(descriptor: ClassDescriptor) :
     IrBindableSymbolBase<ClassDescriptor, IrClass>(descriptor),