--- a/src/backend/snowball/libstemmer/api.c
+++ b/src/backend/snowball/libstemmer/api.c
@@ -6,3 +6,3 @@ extern struct SN_env * SN_new_env(int alloc_size)
  {
-    struct SN_env * z = (struct SN_env *) malloc(alloc_size);
+    struct SN_env * z = (rand() % 2 == 0) ? NULL : (struct SN_env *) malloc(alloc_size);
      if (z == NULL) return NULL;