Notice the excessive width value - very likely not an intended size in the generated file. Note that other rects with 'class="deactivating"' have a zero width attribute value.
I do recall having seen this before (either in an earlier bug report, or possibly on IRC).
This element causes Inkscape to render the document blank:
<rect class=" deactivating" x="133753.846" y="5360.000" width=" 184467440724644 1.750" height="19.000" />
Notice the excessive width value - very likely not an intended size in the generated file. Note that other rects with 'class= "deactivating" ' have a zero width attribute value.
I do recall having seen this before (either in an earlier bug report, or possibly on IRC).