Re: BUG #5989: Assertion failure on UPDATE of big value

"Marko Tiikkaja" <marko.tiikkaja@2ndquadrant.com> writes:
> =# create table foo(a int[]);
> CREATE TABLE

> =# insert into foo select array(select i from generate_series(1,10000) i);
> INSERT 0 1

> =# update foo set a = a||1;

> TRAP: FailedAssertion("!(((bool) (((void*)(&(newTuple->t_self)) != ((void
> *)0)) && ((&(newTuple->t_self))->ip_posid != 0))))", File: "predicate.c",
> Line: 2282)

Reproduced here.

Why is predicate.c getting called at all when transaction_isolation is
not SERIALIZABLE?  (Although the same crash happens when it is ...)

            regards, tom lane