[cfe-dev] Visit nodes in the order of the user output to create better reports

[Csaba Dabis via cfe-dev]

Hello!

Why does the 'generateVisitorsDiagnostics()' function in BugReporter.cpp
work backwards? It starts from the node of the error and iterate over the
preds.

I have tried to make it to work forward with storing the 'const
ExplodedNode *' nodes in a vector, but 'auto P = V->VisitNode(NextNode,
BRC, *R);' crashes. I just found out the 'LastPiece' checking could be
moved out from the while-loop, that is it for now.

Is it possible to achieve? What is could be problematic with that code
snippet?

Thanks you for the suggestions,
Csaba.
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