From: james.d.masters@...
Date: 2007-06-08T02:25:05+09:00
Subject: Re: #<Object:0x2c1c8f0> <--- why is the displayed number == object_id*2

On Jun 6, 8:21 am, s...@seebs.net (Peter Seebach) wrote:
> (The reason, presumably, is that the ID is left-shifted by one, because
> objects with a 1 in the low-order bit are fixnums.)

When I came across this behavior, this was also my best guess as the
reason.