>
>         hash = (text *)palloc(hlen+1);

??? palloc(hlen + VARHDRSZ)

>
>         memset(VARDATA(hash), 0, hlen);
>         SHA512(VARDATA(plain), hlen, VARDATA(hash));


++ VARATT_SIZEP (hash) = VARHDRSZ + ....;

>         PG_RETURN_TEXT_P(hash);
> }
>
> ---------------------------(end of broadcast)---------------------------
> TIP 3: Have you checked our extensive FAQ?
>
>                http://www.postgresql.org/docs/faq
>

---------------------------(end of broadcast)---------------------------
TIP 2: Don't 'kill -9' the postmaster

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