"Convert to Stack Variable" generates invalid code

1. Open a C++-file with the following lines:

   QString *s = new QString();
   s->length();
   

   This is valid C++.

2. Right-click on the declaration of s and select "Refactor" -> "Convert to Stack Variable" from the context menu.
   The code will be changed to:

   QString s = ;
   s.length();
   

   This is invalid code.

The code should remain valid. It could be change to this instead:

QString s;
s.length();

It's strange that this works correctly when s is declared as auto s instead of QString *s.