Oleksandr Shulgin <oleksandr(dot)shulgin(at)zalando(dot)de> writes:
> feikesteenbergen(at)gmail(dot)com writes:
>> When installing a sql-only extension, my backend crashes taking the cluster
>> with it.
> I did a quick debugging session on this and I believe that the cast_hash
> logic in pl_exec.c is to blame.
I've pushed a fix for that. Thanks for the report!
regards, tom lane