segfault after editing cell text

Got a couple of segfaults editing this spreadsheet today; finally got it to happen semi-reliably.

To reproduce:

1. open attached spreadsheet
2. go to tab 4 of 5
3. change text in cell L28 to "pylon"
4. if no segfault, just redo edit -- don't even have to undo

Seems to segfault 75+% of the time.

Also attached output from running valgrind, triggering bug, then closing spreadsheet. It complains about "Invalid read of size 4" in dependent_queue_recalc_main and "Invalid read of size 8" in dynamic_dep_changed, among other things.

Affected version:

• Gnumeric: 1.12.46
• goffice: 0.10.46
• gtk+: 3.24.16

OS: Gentoo

builds-segfault.gnumeric valgrind.txt