Re: points and boxes - core dump

Ewald Geschwinde <webmaster(at)geschwinde(dot)net> writes:
> When using the field koord instead of a static box the system will core
> dump:

Hmm, I get garbage answers for the second and later rows, rather than
a core dump.

> Does anybody have an idea why the problem occurs?

I think the guilty party is the pfree() in dist_pb. Given this set of
data close_pb will return its input Point pointer, so the net result is
dist_pb tries to pfree the supplied constant. A bad move :-(.

I am strongly inclined to rip out *all* the pfrees of someone else's
result in geo_ops.c, not only that one. Given the current handling of
memory management they are a waste of cycles and code space, and after
seeing this example I am not inclined to trust them not to be pfreeing
something they shouldn't.

regards, tom lane