Andreas Seltenreich <seltenre...@gmx.de> writes: > running sqlsmith on the regression database of REL_12_STABLE at > ff597b656f yielded a crash in mcv_get_match_bitmap. I can reproduce it > with the following query on the regression database: > select filler1 from mcv_lists where a is not null and (select 42) <= c;
Seems to be the same problem I just complained of in the other thread: mcv_get_match_bitmap has an untenable assumption that "is a pseudoconstant" means "is a Const". I notice it's also assuming that the Const must be non-null. It's not really easy to crash it that way, because if you just write "null <= c" that'll get reduced to constant-NULL earlier. But I bet there's a way. regards, tom lane