[metapost] Error on using implicit suffix parameter (mpost 1.504)

[Nicola]

In article <4E6F3DDD.3000901 at elvenkind.com>,
 Taco Hoekwater <taco at elvenkind.com> wrote:

> On 09/13/2011 12:53 PM, Nicola wrote:
> >
> > I'm pretty sure that this used to work previously. Can anyone confirm and/or
> > reproduce this? The bug only occurs under the following conditions:
> >
> > - incr (or decr) is used in a for loop with upto or downto;
> > - incr/decr's argument is enclosed in parentheses.
> >
> > Both incr #@ and (incr(#@)) are ok.
> 
> Same problem here (and in 1.211 the code works fine). I've added a bug
> here: http://tracker.luatex.org/view.php?id=715

Ok, I've posted a follow-up there.
Nicola