c# - TPL Dataflow block never completes on PropagateCompletion -


since last alteration propagated-completion pipeline, 1 of buffer blocks never completes. let me summarize working , isn't anymore:

previously working:

a.linkto(b, propagatecompletion); b.linkto(c, propagatecompletion); c.linkto(d, propagatecompletion); d.receive();  // completes

no longer working:

a.linkto(b, propagatecompletion); c.linkto(d, propagatecompletion);  await a.completion; somewriteonceblock.post(b.count); // b.complete(); commented on purpose b.linkto(c, propagatecompletion);  d.receive();  // reaches completion // b remains in 'waiting activation' // c executes never completes since b doesn't either

if uncomment commented line, works, line should not necessary.

somehow bufferblock b never reaches completion, though block linked to completed , propagates completion, , block linked from receives buffered items.

by awaiting completion of none of remaining code executed until completes. that's how await works - code after wrapped in continuation ready completion of awaited code. in scenario b linked after completes completion not propagated think.


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