Philipp Reisner <philipp(dot)reisner(at)linbit(dot)com> writes:
> If I execute this query several times (I receive the correct result set),
> and then do an explain of the same query, the backend terminates with
> sig 11 !!!
Can you get us a debugger stack trace from the crash?
Also you should specify the platform you're using in reports of this sort.
regards, tom lane