Creating node with path ending in "/" with sequence flag set

In 3.0.1, I could create a sequence node like this:
/nodes/0000001
like this:
string path = "/nodes/";
string value = "data";
int rc = zoo_acreate(zh, path.c_str(), value.c_str(), value.length(), &ZOO_OPEN_ACL_UNSAFE, ZOO_EPHEMERAL | ZOO_SEQUENCE, &czoo_created, &where);

In 3.1.1, this fails with error -8 (ZBADARGUMENTS).

Adding something after the "/" in the path makes the code work fine:
string path = "/nodes/n";

I assume something is checking if the path ends in "/" but not checking the sequence flag.