if (read_cache() < 0)
die("index file corrupt");
- argv = xcalloc(num_options + 5, sizeof(const char *));
+ /* 4: "fetch" (options) "--submodule-prefix" prefix NULL */
+ argv = xcalloc(num_options + 4, sizeof(const char *));
argv[argc++] = "fetch";
for (i = 0; i < num_options; i++)
argv[argc++] = options[i];