Crash in painting selection overlay

Qt Creator crashes, when find&replace on a selected text

Steps to Reproduce:
1) Open attached file "qtcreator segfault.txt"
2) Select a text, where "test pop" appears. E.g. the whole "StartTestCreateStackTrace_String" function.
3) Press CTRL+F, type in search field "test pop" and in replace field "STRING: test pop" and press the REPLACE-RIGHT button.
-> my qtcreator crashes after pressing the button 4 times

If you don't select a text, it does not crash - but sometimes it crashes when you press CTRL+Z afterwards (hold the key).

(gdb) r segfault.txt
Starting program: /opt/qtcreator-2.0.1/bin/qtcreator segfault.txt
[Thread debugging using libthread_db enabled]
[New Thread 0xb4eccb70 (LWP 26229)]
[Thread 0xb4eccb70 (LWP 26229) exited]
[New Thread 0xb4eccb70 (LWP 26230)]
[New Thread 0xb0dffb70 (LWP 26237)]
[New Thread 0xb05feb70 (LWP 26238)]
[New Thread 0xafdfdb70 (LWP 26240)]
[New Thread 0xaf5b2b70 (LWP 26241)]

Program received signal SIGSEGV, Segmentation fault.
0xb78a124f in QTextLine::naturalTextRect() const () from /opt/qtcreator-2.0.1/bin/../lib/libQtGui.so.4
(gdb)