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Fixes both "hung merge" and "broadcastThrough identity". The
unlessA
breaks monadic tail recursion.For posterity, here's how I found this one:
Stream.merge
but none of the changes there changed the "shape" of streams besides swapping inChannel
forQueue
MemoryLeakSpec
, I noticed theBindBind
chains contained lots of references toPull.eval(...).flatMap
, so I searchedChannel.scala
forPull.eval
-- there were only 2 matches, one of which had theunlessA