Affects Version/s: None
Fix Version/s: None
The docstring for alts! reads:
ports is a set of channel endpoints, which
can be either a channel to take from or a vector of
[channel-to-put-to val-to-put], in any combination.
However, trying to use an actual set yields the following exception:
java.lang.UnsupportedOperationException: nth not supported on this type: PersistentHashSet