(LightClasses) while looking for accessors we expect them to be taken from single class

compiler/light-classes/src/org/jetbrains/kotlin/asJava/LightClassUtil.kt

@@ -128,10 +128,18 @@ object LightClassUtil {
         return getPsiMethodWrappers(declaration).firstOrNull()
     }
 
-    private fun getPsiMethodWrappers(declaration: KtDeclaration): Sequence<KtLightMethod> =
-            getWrappingClasses(declaration).flatMap { it.methods.asSequence() }
-                    .filterIsInstance<KtLightMethod>()
-                    .filter { it.kotlinOrigin === declaration }
+    private fun getPsiMethodWrappers(declaration: KtDeclaration): Sequence<KtLightMethod> {
+        val classes = getWrappingClasses(declaration)
+        for (clazz in classes) {
+            // the first class with methods found should contain all methods with kotlinOrigin, so no need to look after
+            val methods = clazz.methods
+                .filterIsInstance<KtLightMethod>()
+                .filter { it.kotlinOrigin === declaration }
+            if (methods.isNotEmpty())
+                return methods.asSequence()
+        }
+        return emptySequence()
+    }
 
     private fun getWrappingClass(declaration: KtDeclaration): PsiClass? {
         if (declaration is KtParameter) {