Class objects also can have delegated members

compiler/testData/loadKotlin/classObject/Delegation.kt

@@ -0,0 +1,11 @@
+package test
+
+trait T {
+    fun foo(): Int
+}
+
+class A : T {
+    override fun foo() = 42
+
+    class object : T by A()
+}

compiler/testData/loadKotlin/classObject/Delegation.txt

@@ -0,0 +1,15 @@
+package test
+
+internal final class A : test.T {
+    /*primary*/ public constructor A()
+    internal open override /*1*/ fun foo(): jet.Int
+    
+    internal class object <class-object-for-A> : test.T {
+        /*primary*/ private constructor <class-object-for-A>()
+        internal open override /*1*/ /*delegation*/ fun foo(): jet.Int
+    }
+}
+
+internal trait T {
+    internal abstract fun foo(): jet.Int
+}