M Z <jm80008@gmail.com> writes:
> The thing is, why it doesn't crash on 8.3.8 but crash on 8.4.2? Any idea?
Pure luck. Memory-clobber bugs like these are notoriously
nondeterministic. Any minor, logically unrelated change could make them
visible or not visible, because the clobber happens to clobber data that
is or is not in active use at the moment.
regards, tom lane