add test for issue #6266

tests/unit/src/unit/issues/Issue6266.hx

@@ -0,0 +1,9 @@
+package unit.issues;
+
+class Issue6266 extends unit.Test {
+
+	function test() {
+		var foo = "foo";
+		eq(Reflect.field(foo, "length"), 3);
+	}
+}