> This can crash at line:414, if either tuple is invalid memory(but I
> think it's not because we have already accessed this memory in above
> if check) or dtup is invalid (this is also not possible because
> brin_new_memtuple has already accessed this).

I was testing with the brin correlation patch [1] applied.  I cannot
crash it without the patch either.  I am sorry for not testing it
before.  The patch make BRIN selectivity estimation function access
more information.


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