Source code fix: exposed visibility in object members

core/descriptors.runtime/src/org/jetbrains/kotlin/load/java/components/RuntimeSourceElementFactory.kt

@@ -28,5 +28,5 @@ object RuntimeSourceElementFactory : JavaSourceElementFactory {
         override fun getContainingFile(): SourceFile = SourceFile.NO_SOURCE_FILE
     }
 
-    override fun source(javaElement: JavaElement) = RuntimeSourceElement(javaElement as ReflectJavaElement)
+    override fun source(javaElement: JavaElement): JavaSourceElement = RuntimeSourceElement(javaElement as ReflectJavaElement)
 }

core/descriptors/src/org/jetbrains/kotlin/builtins/KotlinBuiltIns.java

@@ -937,7 +937,7 @@ public abstract class KotlinBuiltIns {
         if (!BUILT_INS_PACKAGE_NAME.equals(first(segments))) return false;
 
         String shortName = last(segments).asString();
-        return BuiltInFictitiousFunctionClassFactory.parseClassName(shortName, BUILT_INS_PACKAGE_FQ_NAME) != null;
+        return BuiltInFictitiousFunctionClassFactory.isFunctionClassName(shortName, BUILT_INS_PACKAGE_FQ_NAME);
     }
 
     @Nullable

core/descriptors/src/org/jetbrains/kotlin/builtins/functions/BuiltInFictitiousFunctionClassFactory.kt

@@ -35,7 +35,7 @@ class BuiltInFictitiousFunctionClassFactory(
     private data class KindWithArity(val kind: Kind, val arity: Int)
 
     companion object {
-        @JvmStatic fun parseClassName(className: String, packageFqName: FqName): KindWithArity? {
+        private fun parseClassName(className: String, packageFqName: FqName): KindWithArity? {
             val kind = FunctionClassDescriptor.Kind.byPackage(packageFqName) ?: return null
 
             val prefix = kind.classNamePrefix
@@ -47,6 +47,9 @@ class BuiltInFictitiousFunctionClassFactory(
             return KindWithArity(kind, arity)
         }
 
+        @JvmStatic fun isFunctionClassName(className: String, packageFqName: FqName) =
+                parseClassName(className, packageFqName) != null
+
         private fun toInt(s: String): Int? {
             if (s.isEmpty()) return null