[umbrello-devel] [umbrello] [Bug 191396] Editing attributes in Entity's "Properties" window and adding foreign key constraint causes a crash [invalid UMLObject::getDoc, ClassifierListPage::slotActivateItem, ..., QListWidget::currentItemChanged]

[Joris Steyn]

https://bugs.kde.org/show_bug.cgi?id=191396

--- Comment #25 from Joris Steyn <jorissteyn at gmail.com> ---
Created attachment 82442
  --> https://bugs.kde.org/attachment.cgi?id=82442&action=edit
Fix crash when adding entity constraints

The root cause of this crash is not checking for a valid index when retrieving
the item from the QList. We should at least check that value before calling
at().

The patch I propose adds this check and also fixes the problem causing the
index to be wrong in the first place (like Arash Abedinzadeh described).

This will solve (duplicate) issues: bug 237992, bug 257540, bug 302120 and bug
322541

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