Actually this patch has got some worse problems:
regression=# select '127.0.0.1'::inet + 256;
?column?
-----------
127.0.2.1
(1 row)
which is wrong; if that's not obvious try
regression=# select ('127.0.0.1'::inet + 256) - 256;
?column?
-----------
127.0.1.1
(1 row)
or
regression=# select '127::2'::inet - ('127::2'::inet - 256);
?column?
----------
-65280
(1 row)
I think the overflow checks are wrong, and the current buildfarm
results say there's a portability problem too. Working on it now...
regards, tom lane
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