In the function Import Customers & Vendors, when both the company and name import data fields are blank, the data row should be ignored.

For that reason, on line 248 of dialog-customer-import.c, the data row is removed from the GtkListStore. But current code does not use the return value of gtk_list_store_remove to set the loop control variable 'valid'.

So 'valid' remains true, the loop continues, and when the next line is read with the iterator pointing to nowhere, GnuCash crashes.