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-rw-r--r--Zend/zend_variables.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/Zend/zend_variables.c b/Zend/zend_variables.c
index c7901085f8..2b2ca0f2d1 100644
--- a/Zend/zend_variables.c
+++ b/Zend/zend_variables.c
@@ -40,6 +40,8 @@ ZEND_API void _zval_dtor_func(zval *zvalue ZEND_FILE_LINE_DC)
TSRMLS_FETCH();
if (zvalue->value.ht && (zvalue->value.ht != &EG(symbol_table))) {
+ /* break possible cycles */
+ Z_TYPE_P(zvalue) = IS_NULL;
zend_hash_destroy(zvalue->value.ht);
FREE_HASHTABLE(zvalue->value.ht);
}