psql regression in CVS HEAD

I'm seeing this:

Welcome to psql 7.4devel, the PostgreSQL interactive terminal.

Type: \copyright for distribution terms
\h for help with SQL commands
\? for help on internal slash commands
\g or terminate with semicolon to execute query
\q to quit

nconway=> \d
nconway=> create table a (b int);
CREATE TABLE
nconway=> \d
nconway=> \dS
nconway=> \d a
nconway=>

(i.e. all the slash commands seem to be returning no output: the server
log show the queries are being sent to the backend, but no output is
produced by psql).

That's with current CVS, on Linux with libreadline4.3

Cheers,

Neil
--
Neil Conway <neilc(at)samurai(dot)com> || PGP Key ID: DB3C29FC