Fix segfault

diff --git a/main/output.c b/main/output.c
index 954a6ad5a4778e27338efcc845e4376c4d40b96b..8012d8088df6b7138a1f7966d21883ab4e7339f4 100644 (file)
--- a/main/output.c
+++ b/main/output.c
@@ -408,7 +408,7 @@ PHPAPI int php_ob_init_conflict(char *handler_new, char *handler_set TSRMLS_DC)
  */
 static int php_ob_init_named(uint initial_size, uint block_size, char *handler_name, zval *output_handler, uint chunk_size, zend_bool erase TSRMLS_DC)
 {
-       if (!zend_is_callable(output_handler, 0, NULL)) {
+       if (output_handler && !zend_is_callable(output_handler, 0, NULL)) {
                return FAILURE;
        }
        if (OG(ob_nesting_level)>0) {