Added test

ext/opcache/tests/preload.inc

@@ -22,3 +22,18 @@ abstract class c {
 class x extends c implements a, b {
 	function foo() { }
 }
+
+trait T1 {
+	static function foo() {
+		var_dump(__METHOD__);
+	}
+}
+trait T2 {
+	use T1;
+	static function bar() {
+		var_dump(__METHOD__);
+	}
+}
+class Y {
+	use T2;
+}

ext/opcache/tests/preload_003.phpt

@@ -0,0 +1,19 @@
+--TEST--
+Preloading classes linked with traits
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.optimization_level=-1
+opcache.preload={PWD}/preload.inc
+--SKIPIF--
+<?php require_once('skipif.inc'); ?>
+--FILE--
+<?php
+Y::foo();
+Y::bar();
+?>
+OK
+--EXPECT--
+string(7) "T1::foo"
+string(7) "T2::bar"
+OK