[Inkscape-devel] Removing ID attribute from group (XML editor) causes crash

While editing an Inkscape-created document, if I delete the ID attribute of a group (or any other element, on further investigation) using the XML editor, and then select that element in the visual editor, Inkscape crashes.

The ID in question is not referenced elsewhere in the document.

Is it valid SVG to have objects without IDs? It certainly seems like it should be, particularly for hand-crafted SVG.

I can reproduce this trivially in Inkscape's trunk build from 22 Sep 2013 on a blank document with nothing but a plain rectangle.

- Bryan