PHP has changed (undefined) behaviour from 5.3.2 to 5.3.3: ->{} = , which seems to have been never an officially supported syntax and have never been a valid property name, is no longer allowed and PHP bails.

ext/pdo_mysql/tests/pdo_mysql_stmt_fetchobject.phpt

@@ -39,7 +39,8 @@ try {
 			$this->not_a_magic_one();
 			printf("myclass::__set(%s, -%s-) %d\n",
 				$prop, var_export($value, true), $this->set_calls, self::$static_set_calls);
-			$this->{$prop} = $value;
+			if ("" != $prop) 
+				$this->{$prop} = $value;
 		}
 
 		// NOTE: PDO can call regular methods prior to calling __construct()
@@ -96,4 +97,4 @@ object(myclass)#%d (4) {
   [%u|b%"null"]=>
   NULL
 }
-done!
+done!