On 20/08/2018 12:46, Andres Freund wrote:
> static VacAttrStats *
> examine_attribute(Relation onerel, int attnum, Node *index_expr)
> {
> ...
> /*
> * Create the VacAttrStats struct. Note that we only have a copy of the
> * fixed fields of the pg_attribute tuple.
> */
> stats = (VacAttrStats *) palloc0(sizeof(VacAttrStats));
> stats->attr = (Form_pg_attribute) palloc(ATTRIBUTE_FIXED_PART_SIZE);
> memcpy(stats->attr, attr, ATTRIBUTE_FIXED_PART_SIZE);
>
> Accesses to stats->attr can legitimately assume that the padding at the
> tail end of attr is present (i.e. widening a load / store).
Yeah, that's probably just broken.
--
Peter Eisentraut http://www.2ndQuadrant.com/
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