core-dump setting text position with units=normalized

[Ben Abbott]

On MacOS 10.6.5 (or Ubuntu 10.04 via VirtualBox).

octave:1> ht = text (0, 0, "Hello", "units", "normalized");
octave:2> set (ht, "position", [0.5 0.5])
Assertion failed: (count () == 0), function freerep, file 
../liboctave/dim-vector.h, line 123.
panic: Abort trap -- stopping myself...
attempting to save variables to `octave-core'...
save to `octave-core' complete

In some cases, I don't immediately see a crash. But if I try a second time, I 
get a seg-fault for the text command. Both back-traces are attached.

I made to (trivial?) changes to text objects in the last two days.

        http://hg.savannah.gnu.org/hgweb/octave/rev/3f952c6973f7

        http://hg.savannah.gnu.org/hgweb/octave/rev/521f2bb7c443

I don't see how these could be responsible, but I hadn't seen this before, so 
they may be related.

Any ideas / insight?

Ben

bt.txt
Description: Text document

bt2.txt
Description: Text document