"Rename Symbol under Cursor" sees removed files in rename dialog

Reproduce:

1. Start with a Console Project (Wizard with qmake)
2. add a new class ClassB
3. add a class ClassD derived from ClassB
4. remove the file classd.cpp with "remove" in project tree panel, permanently delete.
5. accept that the classd.h file is also removed.
6. Refactor ClassB name with "Rename Symbol under Cursor".
7. Give ClassB a new Name: ClassB2

The rename dialog offers file classd.h:

At least it is not selected by default.

The classd.h file seems to be still open, even though it was removed and is not part of the project anymore, and it is not existing in the file system anymore.

Maybe it should be removed from the open documents to solve this hickup?