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Qt Creator 13.0.x comes with LLVM 17. Just upgrade to https://download.qt.io/official_releases/qtcreator/13.0/
Turns out I was using an old version of crashpad that was explicitly adding in those old libs in the .pri file.
@StudentScripter For the grouping you have to use an adequate data structure.
As for hovering, IIRC, you have to have mouse tracking enabled on the view.
@TheoSys File a bug to Qt and tell them to fix it.