Ok, got it. Fix will land upstream shortly. The problem is that the dragging of the little square (as opposed to dragging of the data) is creating a crazy-tall tooltip that gtk+ cannot handle. You can use copy+paste instead.
Note: you are better off using HYPOT over IMABS+COMPLEX. The latter creates a string and some kind of rounding is therefore involved. -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org