This bug definitely seems to be related to race conditions as has been suggested before.
You can do the test by hitting F2, entering an new name immediately followed by [ENTER]. Thunar is likely to crash. The same happens when you click OK too fast after entering a new name (put the mouse cursor on the button and press immediately after entering the last character).
When I leave a pause after entering a new name both the enter key and OK-button are much less likely to cause the crash (I have not experienced it yet).
This bug definitely seems to be related to race conditions as has been suggested before.
You can do the test by hitting F2, entering an new name immediately followed by [ENTER]. Thunar is likely to crash. The same happens when you click OK too fast after entering a new name (put the mouse cursor on the button and press immediately after entering the last character).
When I leave a pause after entering a new name both the enter key and OK-button are much less likely to cause the crash (I have not experienced it yet).