xbt_die("No collective is valid for '%s'! This is a bug.",name);
name_list = xbt_strdup(table[0].name);
for (int i = 1; table[i].name; i++) {
xbt_die("No collective is valid for '%s'! This is a bug.",name);
name_list = xbt_strdup(table[0].name);
for (int i = 1; table[i].name; i++) {