do not memcpy from NULL

4a757609 · Benjamin Peterson · a1bc246d · 4a757609
Commit 4a757609 authored Sep 06, 2016 by Benjamin Peterson
Hide whitespace changes
Inline Side-by-side

Showing with 2 additions and 1 deletion

Modules/hashtable.c Modules/hashtable.c +2 -1

No files found.
--- a/Modules/hashtable.c
+++ b/Modules/hashtable.c
@@ -327,7 +327,8 @@ _Py_hashtable_set(_Py_hashtable_t *ht, const void *key,
    entry->key_hash = key_hash;
    assert(data_size == ht->data_size);
-    memcpy(_Py_HASHTABLE_ENTRY_DATA(entry), data, data_size);
+    if (data)
+        memcpy(_Py_HASHTABLE_ENTRY_DATA(entry), data, data_size);
    _Py_slist_prepend(&ht->buckets[index], (_Py_slist_item_t*)entry);
    ht->entries++;