Created attachment 84881 [details]
Example

Hello,
My Calc file was crashed when do this steps. Please, try to do the same steps to be sure that this is really bug:

1. Open file Undo (attached below)
2. Do not makes any changes, just click button “Delete“
3. On toolbar Drawing click on icon Rectangle to make similar rectangle
4. When you finished with new rectangle, press again button „Delete“
5. My file crashes when I performing this.

Next what I found:
1. Open file Undo
2. Do not makes any changes, just click button “Delete“
3. Close the file
4. In my case, there is no window to ask me to save changes!

I am using Apache OpenOffice 4.1.1 on WIn 7 Home edition 64