My program entered an absent arg!

[Simon Peyton-Jones]

Jeremy

Thanks for sending the program.  Indeed, it turns out that
5.02.1 has a rarely-occurring bug in the demand analyer.
(My fault, I am sad to say.)

We've fixed the bug, but won't put out a new release until
we've accumulated a few more.  Meanwhile, I gather that
it's not getting in your way, because small changes in 
the code make it go away, right?

Simon


| -----Original Message-----
| From: Jeremy Manson [mailto:jmanson at cs.umd.edu] 
| Sent: 02 November 2001 20:46
| To: glasgow-haskell-bugs at haskell.org
| Subject: My program entered an absent arg!
| 
| 
| 
| Hi folks.  Your FAQ says anytime a program enters an absent 
| arg, it is    
| your fault, so :)...
| 
| I get this message when I run my program (on certain data).  
| I get it in  
| GHC 5.02 and 5.02.1; I never used to get it in 5.00:
| 
| Fail: Oops!  Entered absent arg ww_s7PF [PrelBase.Char{-3o-}]
| 
| My machine is a Sun Ultra 60 running Solaris 2.6.  gcc 2.8.1.
| 
| I am not sure what else to send.  The code itself is about 
| 2500+ lines.  
| I can tar it and send it on, if you like.  It is a little 
| spaghetti-ified, because it was something of a learning 
| experience with me for larger programs in Haskell...
| 
| Anyway, when I run it with certain inputs, I get the above 
| message.  I attach the output from the compiler, if it is of any help.
| 
| 					Jeremy Manson
| 					jmanson at umd.edu
|