QtCreator crashes if clicking Search with 'Current File' but file was closed.

When doing "2 Search Results" with Scope: Current File and clicking [Search] button after file was closed, as for example when you forgot that Scope was set to Current File, QtCreator just disappears (crashes) without a warning.

It is noteworthy that if no files are open when you select Current File all the fields and buttons are grayed out as they should be. But if you do a search on an open file, then close the file, the search fields are not grayed out and clicking the Search button causes the crash.