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Date: Sat, 19 Jul 2008 11:15:41 +0900 (JST)
Message-Id: <20080719.111541.241450042.garrigue@math.nagoya-u.ac.jp>
To: jeremy.yallop@ed.ac.uk
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] Troublesome nodes
From: Jacques Garrigue <garrigue@math.nagoya-u.ac.jp>
In-Reply-To: <20080718.225528.233096504.garrigue@math.nagoya-u.ac.jp>
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X-Spam: no; 0.00; nodes:01 expansions:01 caml-list:01 int:01 int:01 loops:02 garrigue:03 garrigue:03 jacques:03 jacques:03 let:03 nagoya-u:04 nagoya-u:04 side-effect:04 problem:05 

From: Jacques Garrigue <garrigue@math.nagoya-u.ac.jp>

> This is now fixed. I just hope this does not break anything...
> It should be ok, but please report any new non-termination problem
> immediately :-)

OK, my first solution was not correct, and caused infinite loops with

  type t = <a:u; b:int> and u = private t
  let f x = (x : t :> <a:'a; b:int> as 'a)

This is now fixed by distinguishing public and private expansions in
the expansion cache. This time I see no side-effect.

Jacques Garrigue