CMake: Conflicting examples in qtdeclarative, qtquick3d

agent:2020/08/21 15:08:48 build.go:302: Call Stack (most recent call first):
agent:2020/08/21 15:08:48 build.go:302:   qtbase/lib/cmake/Qt6Gui/Qt6GuiDependencies.cmake:26 (find_dependency)
agent:2020/08/21 15:08:48 build.go:302:   qtbase/lib/cmake/Qt6Gui/Qt6GuiConfig.cmake:38 (include)
agent:2020/08/21 15:08:48 build.go:302:   qtbase/lib/cmake/Qt6/Qt6Config.cmake:90 (find_package)
agent:2020/08/21 15:08:48 build.go:302:   qtquick3d/examples/quick3d/customgeometry/CMakeLists.txt:19 (find_package)
agent:2020/08/21 15:08:48 build.go:302: CMake Error at qtbase/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:440 (add_executable):
agent:2020/08/21 15:08:48 build.go:302:   add_executable cannot create target "customgeometry" because another target
agent:2020/08/21 15:08:48 build.go:302:   with the same name already exists.  The existing target is an executable
agent:2020/08/21 15:08:48 build.go:302:   created in source directory
agent:2020/08/21 15:08:48 build.go:302:   "/home/qt/work/qt/qt5/qtdeclarative/examples/quick/scenegraph/customgeometry".
agent:2020/08/21 15:08:48 build.go:302:   See documentation for policy CMP0002 for more details.