What does test status postponed for a patch on d.o mean?
The problem is that the current Rules branch is currently failing an already commited test. While this should obviously not be possible, as tests should be green before they are commited, rare circumstances will cause this to happen from time to time.

Since an already existing test does fail, we know that testing with your new patch will also fail, whether your patch is correct or not. Thus all tests are postponed until the existing and breaking test is fixed.