Fix for KT-6722

#KT-6722 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/ImplementationBodyCodegen.java

@@ -1254,7 +1254,7 @@ public class ImplementationBodyCodegen extends ClassBodyCodegen {
         for (KtDeclaration declaration : myClass.getDeclarations()) {
             if (declaration instanceof KtProperty) {
                 KtProperty property = (KtProperty) declaration;
-                KtExpression initializer = property.getInitializer();
+                KtExpression initializer = property.getDelegateExpressionOrInitializer();
                 if (initializer != null) {
                     initializer.accept(visitor);
                 }

compiler/testData/codegen/boxWithStdlib/delegatedProperty/kt6722.kt

@@ -0,0 +1,12 @@
+interface T {
+}
+
+fun box(): String {
+    val a = "OK"
+    val t = object : T {
+        val foo by lazy {
+            a
+        }
+    }
+    return t.foo
+}

compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxWithStdlibCodegenTestGenerated.java

@@ -1456,6 +1456,12 @@ public class BlackBoxWithStdlibCodegenTestGenerated extends AbstractBlackBoxCode
             JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/boxWithStdlib/delegatedProperty"), Pattern.compile("^(.+)\\.kt$"), true);
         }
 
+        @TestMetadata("kt6722.kt")
+        public void testKt6722() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithStdlib/delegatedProperty/kt6722.kt");
+            doTestWithStdlib(fileName);
+        }
+
         @TestMetadata("stackOverflowOnCallFromGetValue.kt")
         public void testStackOverflowOnCallFromGetValue() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithStdlib/delegatedProperty/stackOverflowOnCallFromGetValue.kt");