Dataflow: Propagate provenance correctly for flow-through wrappers. #17108
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I expect this to mostly affect edges that have a corresponding subpaths-tuple, so it won't have much effect on the actual path explanations, but if you somehow provide a modeled library function with through-flow as a call-back argument to another library function, which then results in a combined through-flow, then it could be relevant.
In any case, it's a small correctness bug that's easy to fix. And we should see plenty of test coverage of this in the recorded
edges
relations in qltests.