I wrote:
> (Just offhand, it rather looks like dict_int and dict_xsyn are both
> assuming that palloc will give back zeroed space, which is bogus...)
Yeah, this is definitely broken. Patches committed; thanks for the
report.
http://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=e3e3087d8717c26cd1c4581ba29274ac214eb816
regards, tom lane