Fix false flag name clash

Signed-off-by: Wilko Manger <wilko@dotlin.org>

compiler/src/main/kotlin/org/dotlin/compiler/backend/steps/ir2ast/ir/IrUtils.kt

@@ -261,7 +261,7 @@ fun IrType.isNullableDouble() = isNullableType(IdSignatureValues._double)
 fun IrType.isNullableChar() = isNullableType(IdSignatureValues._char)
 
 val IrDeclarationWithVisibility.isPrivate
-    get() = visibility == DescriptorVisibilities.PRIVATE
+    get() = visibility == DescriptorVisibilities.PRIVATE || visibility == DescriptorVisibilities.PRIVATE_TO_THIS
 
 inline fun <reified T : IrDeclarationWithName> Iterable<IrDeclaration>.withNameOrNull(name: String): T? =
     filterIsInstance<T>().firstOrNull { it.name == Name.identifier(name) }

compiler/src/test/kotlin/compile/NameMangling.kt

@@ -162,4 +162,31 @@ class NameMangling : BaseTest {
             """
         )
     }
+
+    @Test
+    fun `class with lateinit property and method with the same name`() = assertCompile {
+        kotlin(
+            """
+            class Test<out T> {
+                private lateinit var next: T
+
+                fun next() {}
+            }
+            """
+        )
+
+        dart(
+            """
+            import 'package:meta/meta.dart';
+
+            @sealed
+            class Test<T> {
+              @nonVirtual
+              late T _next;
+              @nonVirtual
+              void next() {}
+            }
+            """
+        )
+    }
 }