Created attachment 543348 [details] Stack trace from GDB Go to File > Document Properties, switch to Properties in the left list, add a custom property name, say "URI", enter anything for the ´Value´ field and press ´Add´: gnumeric crashes. I've tried versions 1.10.35 to 1.10.42 (the most recent at the time of this report). They *all* crash with a segfault in libgobject-*.so.0 . I've also tried with other property names, with existing documents and an empty document: there's a crash every time.
Created attachment 543350 [details] emerge --info
*facepalm* ERRATUM from above description: I've tried with version 1. 12 .x not 1. 10 .x ! Sorry for the noise.
Reproduced and reported upstream.
Problem was fixed in version 1.12.44 by upstream 7 months ago. My bad, didn't follow. I've tested it and it works.