Steps to reproduce:
1. Create and save a custom report.
2. Modify the custom report (perhaps at a later time when you when you change
the date range or add a new expense account) and then save the modifed report. 
3. This will create two same-named entries in the saved-reports-1.8 file.
4. The next time you try to run that custom report GnuCash will crash and you
find yourself looking at the Gnome desktop.


Stack trace:
I don't know how to get this because the crash produces no error messasge.

Other information:
I have searched bugzilla for similar bug reports and found 312625 and 168250. I
beleive that all of these problems are being caused by duplicate entries in the
saved-reports-1.8 file. Is there some way that the "Save Report" command can ask
if you want to overwrite an existing report or create a new one? I think that
change would alleviate all these kinds of problems. 

Note: I am running Fedora 4 and GnuCash 1.8.12 is the most recent version
available at the Fedora Updates repository.