BUG #5846: Segfault Postgresql Built with --lib-libedit-preferred

The following bug has been logged online:

Bug reference:      5846
Logged by:          David E. Wheeler
Email address:      david@kineticode.com
PostgreSQL version: 9.0.1
Operating system:   Mac OS X 10.6.6
Description:        Segfault Postgresql Built with --lib-libedit-preferred
Details:

Been meaning to report this for a while.

* Build PostgreSQL on Mac OS X using --with-libedit-preferred.
* Connect to the server from psql
* type "\d feat<tab>", where "<tab>" is the tab key, an attempt to
autocomplete
 * Output for me:

try=# \d mls_fepsql(69838) malloc: *** error for object 0x6: pointer being
freed was not allocated
*** set a breakpoint in malloc_error_break to debug
zsh: abort      psql corp_schema

YOW! I *assume* it's something funky with libedit, but in case you can't
reproduce it with just the libedit option, I configure my server with:

    ./configure --with-libedit-preferred --with-bonjour --with-perl
PERL=$PERL \
    --with-openssl --with-pam --with-krb5 --with-libxml --with-ldap \
    --with-ossp-uuid --with-includes=/usr/local/include \
    --enable-integer-datetimes --with-zlib \
    --with-libs=/usr/local/lib

Best,

David