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21c9756db6
When estimating the cost/size of a pre-sorted path for a given upper relation using local stats, this function dereferences the passed-in PgFdwPathExtraData pointer without checking that it is not NULL. But that is not a bug as the pointer is guaranteed to be non-NULL in that case; to avoid confusion, add an Assert to ensure that it is not NULL before dereferencing it. Reported-by: Ranier Vilela <ranier.vf@gmail.com> Author: Etsuro Fujita <etsuro.fujita@gmail.com> Reviewed-by: Ranier Vilela <ranier.vf@gmail.com> Discussion: https://postgr.es/m/CAEudQArgiALbV1akQpeZOgim7XP05n%3DbDP1%3DTcOYLA43nRX_vA%40mail.gmail.com