BUG #5769: Problem with SPI_getvalue

The following bug has been logged online:

Bug reference:      5769
Logged by:          Helmar Spangenberg
Email address:      hspangenberg@frey.de
PostgreSQL version: 9.0.1
Operating system:   Linux
Description:        Problem with SPI_getvalue
Details:

Referring to the manual, I can pfree the result returned by SPI_getvalue.
However the backend crashes as soon as I use pfree.

No example uses pfree. Could it be possible, there is a bug in the
documentation?

Thanks,
Helmar