Crash happen when checking for "event.string" in "treeview_keypress" function in "gramps/gui/widgets/interactivesearchbox.py" Note that https://lazka.github.io/pgi-docs/Gdk-3.0/classes/EventKey.html#Gdk.EventKey says it is deprecated and should never be used. Gdk.keyval_to_unicode return the corresponding unicode character, or 0 if there is no corresponding character. Fixes #9130. (cherry picked from commit bc1724533171fe69a6a775101d8d4318ba05b396)