crash: SET DateStyle TO DEFAULT

In the current CVS:

test=# SET DateStyle TO DEFAULT;
pqReadData() -- backend closed the channel unexpectedly.
This probably means the backend terminated abnormally
before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.
!#

in log:

[..cut..]
DEBUG: ProcessUtility: SET DateStyle TO DEFAULT;
/usr/lib/postgresql/bin/postmaster: reaping dead processes...
/usr/lib/postgresql/bin/postmaster: CleanupProc: pid 30063 exited with
status 1
Server process (pid 30063) exited with status 11 at Fri Sep 22 14:35:17 2000
Terminating any active server processes...

Karel

PS. Sorry of this brief info, but I haven't time for detail
exploration now :-(