Internal error upon erasing last symbol of "text on path"

[YellowAfterlife]

Inkscape 0.91 r13725
Windows 8.1 32-bit

GIF of what's happening: http://i.imgur.com/kytExNf.gif
After erasing the last symbol from a "text on path" (sample attached), Inkscape displays an "internal error has occurred" message.
A backup is saved and no changes are lost so it is a low priority issue, but could probably be looked at sometime.

[su_v (suv-lp)]

Thank you for taking the time to report this crash - the issue is known and already tracked in
* Bug #1426879 “Text alignment path and delete text.”
  https://bugs.launchpad.net/inkscape/+bug/1426879

Linking as duplicate to bug #1426879.