Added workaround for the problem that IDEA doesn't allow keywords in cls annotations.

idea/src/org/jetbrains/kotlin/idea/inspections/UnusedSymbolInspection.kt

@@ -123,6 +123,12 @@ public class UnusedSymbolInspection : AbstractKotlinInspection() {
     }
 
     private fun isEntryPoint(declaration: JetNamedDeclaration): Boolean {
+        // TODO Workaround for EA-64030 - IOE: PsiJavaParserFacadeImpl.createAnnotationFromText
+        // This should be fixed on IDEA side: ClsAnnotation should not throw exceptions when annotation class has Java keyword
+        if (declaration is JetNamedFunction) {
+            if (declaration.getAnnotationEntries().any { it.getTypeReference().getText().endsWith("native") }) return false
+        }
+
         val lightElement: PsiElement? = when (declaration) {
             is JetClassOrObject -> declaration.toLightClass()
             is JetNamedFunction -> LightClassUtil.getLightClassMethod(declaration)

idea/testData/inspections/unusedSymbol/function/inspectionData/expected.xml

@@ -51,4 +51,13 @@
     <problem_class severity="WARNING" attribute_key="NOT_USED_ELEMENT_ATTRIBUTES">Unused Symbol</problem_class>
     <description>Function 'unused' is never used</description>
   </problem>
+
+  <problem>
+    <file>withNativeAnnotation.kt</file>
+    <line>3</line>
+    <module>light_idea_test_case</module>
+    <entry_point TYPE="file" FQNAME="temp:///src/withNativeAnnotation.kt" />
+    <problem_class severity="WARNING" attribute_key="NOT_USED_ELEMENT_ATTRIBUTES">Unused Symbol</problem_class>
+    <description>Function 'withNativeAnnotation' is never used</description>
+  </problem>
 </problems>

idea/testData/inspections/unusedSymbol/function/withNativeAnnotation.kt

@@ -0,0 +1,5 @@
+annotation class native
+
+native fun withNativeAnnotation() {
+
+}