File "/data/user/0/org.electrum.electrum/files/app/crystax_python/site-packages/kivy/core/window/window_sdl2.py", line 727, in mainloop
    self._mainloop()
  File "/data/user/0/org.electrum.electrum/files/app/crystax_python/site-packages/kivy/core/window/window_sdl2.py", line 662, in _mainloop
    self.modifiers):
  File "kivy/_event.pyx", line 703, in kivy._event.EventDispatcher.dispatch
  File "kivy/_event.pyx", line 1214, in kivy._event.EventObservers.dispatch
  File "kivy/_event.pyx", line 1138, in kivy._event.EventObservers._dispatch
  File "/data/user/0/org.electrum.electrum/files/app/crystax_python/site-packages/kivy/core/window/__init__.py", line 162, in _on_window_key_down
    return self.dispatch('on_key_down', keycode, text, modifiers)
  File "kivy/_event.pyx", line 703, in kivy._event.EventDispatcher.dispatch
  File "kivy/_event.pyx", line 1214, in kivy._event.EventObservers.dispatch
  File "kivy/_event.pyx", line 1138, in kivy._event.EventObservers._dispatch
  File "/data/user/0/org.electrum.electrum/files/app/crystax_python/site-packages/kivy/uix/textinput.py", line 2468, in keyboard_on_key_down
    self._key_down(key)
  File "/data/user/0/org.electrum.electrum/files/app/crystax_python/site-packages/kivy/uix/textinput.py", line 2291, in _key_down
    self.delete_selection()
  File "/data/user/0/org.electrum.electrum/files/app/crystax_python/site-packages/kivy/uix/textinput.py", line 1250, in delete_selection
    self._set_unredo_delsel(a, b, v[a:b], from_undo)