Fixed bug #65291 - get_defined_constants() crash with __CLASS__ in trait

NEWS

@@ -4,6 +4,8 @@ PHP                                                                        NEWS
 
 - Core.
   . Improve fix for bug #63186 (compile failure on netbsd). (Matteo)
+  . Fixed bug #65291 (get_defined_constants() causes PHP to crash in a very
+    limited case). (Arpad)
 
 - Session:
   . Fixed bug #62129 (rfc1867 crashes php even though turned off). (gxd305 at

Zend/tests/bug65291.phpt

@@ -0,0 +1,24 @@
+--TEST--
+Bug #65291 - get_defined_constants() causes PHP to crash in a very limited case.
+--FILE--
+<?php
+
+trait TestTrait
+{
+	public static function testStaticFunction()
+	{
+		return __CLASS__;
+	}
+}
+class Tester
+{
+	use TestTrait;
+}
+
+$foo = Tester::testStaticFunction();
+get_defined_constants();
+
+echo $foo;
+?>
+--EXPECT--
+Tester

Zend/zend_builtin_functions.c

@@ -1926,6 +1926,11 @@ static int add_constant_info(zend_constant *constant, void *arg TSRMLS_DC)
 	zval *name_array = (zval *)arg;
 	zval *const_val;
 
+	if (!constant->name) {
+		/* skip special constants */
+		return 0;
+	}
+
 	MAKE_STD_ZVAL(const_val);
 	*const_val = constant->value;
 	zval_copy_ctor(const_val);