1. Open a CMake-based Qt Quick Application project.
   You can take the defaults from Creator's project wizard.
2. In a .qml file, add a trivial item, e.g. "TextEdit {}"
3. Right-click onto the item's name and select "Refactoring" -> "Move Component into Separate File".
4. In the following dialog, click "OK".
   The item is being moved to a separate file.
5. Run the project.
   In Application Output, you can read that the component you created "is not a type".

This fails because the new component was not added to CMakeLists.txt. Adding its filename to "QML_FILES" in "qt_add_qml_module" fixes the issue.

Found and tested by Squish test tst_QMLS04