And these would be the expected results after line-breaking the first ligature (the one on the right, since arabic is a right-to-left script):
ع
ربي
or the second ligature (the one to the left):
عرب
ي
Note: I don't understand Arabic, so I don't know what the text above actually means, or if this kind of edit is really useful. But it should, at least not crash Inkscape (even if the user may be typing non-sensical text)!
This was the arabic text used for testing:
عربي
And these would be the expected results after line-breaking the first ligature (the one on the right, since arabic is a right-to-left script):
ع
ربي
or the second ligature (the one to the left):
عرب
ي
Note: I don't understand Arabic, so I don't know what the text above actually means, or if this kind of edit is really useful. But it should, at least not crash Inkscape (even if the user may be typing non-sensical text)!