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Magne Sjaastad
f0d6081448
Delta ensembles were located by scanning the summary case main collection for objects referring to a given ensemble, and the dependent ensembles were visited by unguarded recursion. A dependency cycle, which is constructible through the UI, made that recursion run forever, and an ensemble used as both source 1 and source 2 was reported twice. Add dependentDeltaEnsembles(), deltaEnsemblesInUpdateOrder() and wouldCreateDependencyCycle() to RimSummaryEnsembleTools. The traversal uses the PDM back references, deduplicates, is iterative with visited and on-path sets, and returns the delta ensembles in topological order so a delta ensemble is always visited before the delta ensembles using it as a source. Back edges are logged instead of traversed. Reimplement updateDependentDeltaEnsembles on top of the new traversal and replace RimDeltaSummaryEnsemble::findReferringEnsembles() with dependentDeltaEnsembles() at its four call sites. Back references also find a delta ensemble that is detached from the project tree, which the previous ancestor scan did not.