<div dir="ltr">I didn't investigate your program to be sure it isn't some other bug, but the potential for this kind of bad behavior has always been with us, yes.<div><br></div><div>Robby</div></div><div class="gmail_extra">
<br><br><div class="gmail_quote">On Fri, Feb 22, 2013 at 3:59 PM, Pierpaolo Bernardi <span dir="ltr"><<a href="mailto:olopierpa@gmail.com" target="_blank">olopierpa@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
So, it has always behaved like this? I'm really surprised that I have<br>
never been bitten by this before. 8^)<br>
<div class="HOEnZb"><div class="h5"><br>
<br>
On Fri, Feb 22, 2013 at 10:51 PM, Robby Findler<br>
<<a href="mailto:robby@eecs.northwestern.edu">robby@eecs.northwestern.edu</a>> wrote:<br>
> I think that the lack of information about tail calls can be particularly<br>
> pernicious in the presence of multiple value errors. It would be good to do<br>
> better, but I'm not sure how. The errortrace library contains what we<br>
> currently do so you'd want to experiment there if you have an idea.<br>
><br>
> Robby<br>
><br>
><br>
> On Fri, Feb 22, 2013 at 1:13 PM, Pierpaolo Bernardi <<a href="mailto:olopierpa@gmail.com">olopierpa@gmail.com</a>><br>
> wrote:<br>
>><br>
>> On Fri, Feb 22, 2013 at 4:40 PM, Ryan Culpepper <<a href="mailto:ryanc@ccs.neu.edu">ryanc@ccs.neu.edu</a>> wrote:<br>
>> > The line<br>
>> ><br>
>> > (date-day quando)99<br>
>> ><br>
>> > looks pretty suspicious; with the 99 there, the first branch of the<br>
>> > enclosing 'if' expression returns 8 values but the second branch returns<br>
>> > 7<br>
>> > values.<br>
>><br>
>> Yes, that was the source of the error (a mistake due to me pressing<br>
>> the Num Lock key inadvertently).<br>
>><br>
>> What had me stumped is that DrRacket gives no hint about the location<br>
>> of the error. Not even the right file!<br>
>> _________________________<br>
>> Racket Developers list:<br>
>> <a href="http://lists.racket-lang.org/dev" target="_blank">http://lists.racket-lang.org/dev</a><br>
><br>
><br>
</div></div></blockquote></div><br></div>