suppress duplicate @Override annotations

plugins/kapt3/kapt3-compiler/src/org/jetbrains/kotlin/kapt3/stubs/ClassFileToSourceStubConverter.kt

@@ -1008,7 +1008,12 @@ class ClassFileToSourceStubConverter(val kaptContext: KaptContextForStubGenerati
         invisibleAnnotations: List<AnnotationNode>?,
         descriptorAnnotations: Annotations
     ): JCModifiers {
+        var seenOverride = false
         fun convertAndAdd(list: JavacList<JCAnnotation>, annotation: AnnotationNode): JavacList<JCAnnotation> {
+            if (annotation.desc == "Ljava/lang/Override;") {
+                if (seenOverride) return list  // KT-34569: skip duplicate @Override annotations
+                seenOverride = true
+            }
             val annotationDescriptor = descriptorAnnotations.singleOrNull { checkIfAnnotationValueMatches(annotation, AnnotationValue(it)) }
             val annotationTree = convertAnnotation(annotation, packageFqName, annotationDescriptor) ?: return list
             return list.prepend(annotationTree)

plugins/kapt3/kapt3-compiler/test/org/jetbrains/kotlin/kapt3/test/ClassFileToSourceStubConverterTestGenerated.java

@@ -288,6 +288,11 @@ public class ClassFileToSourceStubConverterTestGenerated extends AbstractClassFi
         runTest("plugins/kapt3/kapt3-compiler/testData/converter/kt28306.kt");
     }
 
+    @TestMetadata("kt34569.kt")
+    public void testKt34569() throws Exception {
+        runTest("plugins/kapt3/kapt3-compiler/testData/converter/kt34569.kt");
+    }
+
     @TestMetadata("lazyProperty.kt")
     public void testLazyProperty() throws Exception {
         runTest("plugins/kapt3/kapt3-compiler/testData/converter/lazyProperty.kt");

plugins/kapt3/kapt3-compiler/testData/converter/kt34569.kt

@@ -0,0 +1,4 @@
+class T : Runnable {
+    @Override
+    public override fun run() {}
+}

plugins/kapt3/kapt3-compiler/testData/converter/kt34569.txt

@@ -0,0 +1,13 @@
+import java.lang.System;
+
+@kotlin.Metadata()
+public final class T implements java.lang.Runnable {
+
+    @java.lang.Override()
+    public void run() {
+    }
+
+    public T() {
+        super();
+    }
+}