- 
    Bug 
- 
    Resolution: Fixed
- 
    P1: Critical 
- 
    6.5
- 
        c4fc11671 (dev), 925d60291 (6.5)
This is because builtins are not part of the imports. All non-list builtin types are special-cased using stringToBuiltinType() in QQmlIRBuilder. The lists are not. When we get to the point of trying to look them up in QQmlObjectCreator, they aren't found.