GiST: Bug In gistdoinsert() ?

I'm looking over the code in backends/access/gist, and I noticed this
in gist.c, in gistdoinsert():

instup = (IndexTuple *) palloc(sizeof(IndexTuple));
instup[0] = (IndexTuple) palloc(IndexTupleSize(itup));
memcpy(instup[0], itup, IndexTupleSize(itup));

ret = gistlayerinsert(r, GISTP_ROOT, &instup, &len, res, giststate);
if (ret & SPLITED)
gistnewroot(r, instup, len);

for (i = 0; i < len; i++)
pfree(instup[i]);
pfree(instup);

I only understand maybe 5% of what's going on here, but won't it be a
problem if len > 1 after the call to gistlayerinsert()? It looked like
it might be possible that len > 1 if gistSplit() happens.

--
Itai Zukerman <http://www.math-hat.com/~zukerman/&gt;