Wrong completion popup in the middle of float value

1. Have the ClangCodeModel plugin enabled.
2. Have this line in your code:

   float f = 2.
   

3. Place the cursor behind the "." and press Ctrl+Space.
   A code completion popup will appear showing local variables, functions' names and classnames.

The only valid completions in this place are the digits 0 to 9. The completion popup should not be shown. With the built-in code model, this works correctly.

This is similar to QTCREATORBUG-16188 but not a duplicate.