Kapt: Fix supertype conversion for DefaultImpls (KT-28306)

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

@@ -425,6 +425,11 @@ class ClassFileToSourceStubConverter(val kaptContext: KaptContextForStubGenerati
         }
 
         val declaration = kaptContext.origins[clazz]?.element as? KtClassOrObject ?: return defaultSuperTypes
+        val declarationDescriptor = kaptContext.bindingContext[BindingContext.CLASS, declaration] ?: return defaultSuperTypes
+
+        if (typeMapper.mapType(declarationDescriptor) != Type.getObjectType(clazz.name)) {
+            return defaultSuperTypes
+        }
 
         val (superClass, superInterfaces) = partitionSuperTypes(declaration) ?: return defaultSuperTypes
 

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

@@ -269,6 +269,11 @@ public class ClassFileToSourceStubConverterTestGenerated extends AbstractClassFi
         runTest("plugins/kapt3/kapt3-compiler/testData/converter/kt27126.kt");
     }
 
+    @TestMetadata("kt28306.kt")
+    public void testKt28306() throws Exception {
+        runTest("plugins/kapt3/kapt3-compiler/testData/converter/kt28306.kt");
+    }
+
     @TestMetadata("lazyProperty.kt")
     public void testLazyProperty() throws Exception {
         runTest("plugins/kapt3/kapt3-compiler/testData/converter/lazyProperty.kt");

plugins/kapt3/kapt3-compiler/testData/converter/kt28306.kt

@@ -0,0 +1,9 @@
+// CORRECT_ERROR_TYPES
+
+package foo
+
+interface InterfaceWithDefaults<T> {
+    fun foo() {}
+}
+
+interface SubInterface<T> : InterfaceWithDefaults<T>

plugins/kapt3/kapt3-compiler/testData/converter/kt28306.txt

@@ -0,0 +1,42 @@
+package foo;
+
+import java.lang.System;
+
+@kotlin.Metadata()
+public abstract interface InterfaceWithDefaults<T extends java.lang.Object> {
+
+    public abstract void foo();
+
+    @kotlin.Metadata()
+    public static final class DefaultImpls {
+
+        public DefaultImpls() {
+            super();
+        }
+
+        public static <T extends java.lang.Object>void foo(foo.InterfaceWithDefaults<T> $this) {
+        }
+    }
+}
+
+////////////////////
+
+package foo;
+
+import java.lang.System;
+
+@kotlin.Metadata()
+public abstract interface SubInterface<T extends java.lang.Object> extends foo.InterfaceWithDefaults<T> {
+
+    @kotlin.Metadata()
+    public static final class DefaultImpls {
+
+        public DefaultImpls() {
+            super();
+        }
+
+        @java.lang.Override()
+        public static <T extends java.lang.Object>void foo(foo.SubInterface<T> $this) {
+        }
+    }
+}