No question or bug report here, just a gotcha I thought I'd share. I had to whittle a pipeline down to this to realize why it was stalling:
(end /) ... | take 1 | a: chop 10 | b: fanin | ... / a: | b: Of course. Even though there will only ever be one record on its input, CHOP can't know that until after it writes the output to the alternate. I was using FANIN rather than FANINANY to control the order of *other* input streams besides these two. I see two solutions for the general case: * add another TAKE 1 on the primary to sever the stream * add COPY on the alternate to buffer the record In this case, my other inputs will all also have only one record, so I can just change FANIN to GATHER and don't need to add another stage. ¬R
