Procedure on an already built project using CMake :

• Set Working Directory in the Runs Settings to %{CurrentRun:Executable:Path}
• Press Run => Segmentation fault
• Open again QtCreator
• Select the project => Segmentation fault

So two possibilities :

• We cannot use such variables for the Working Directory (which is not very clear)
• QtCreator fails at running the executable from the given path

In any case, QtCreator crashes...