The Hugs Bugs Mailing List

headers Neil Mitchell | 3 Mar 2007 03:00

Hi,

I've just tried to load System.Process and its entirely missing on
WinHugs, should it be there?

Thanks

Neil

On Sat, Mar 03, 2007 at 02:00:20AM +0000, Neil Mitchell wrote:
> I've just tried to load System.Process and its entirely missing on
> WinHugs, should it be there?

It would be useful, but it's not in any version of Hugs
(cf http://cvs.haskell.org/Hugs/pages/libstatus.html).

On 3/3/07, Ross Paterson <ross <at> soi.city.ac.uk> wrote:
> On Sat, Mar 03, 2007 at 02:00:20AM +0000, Neil Mitchell wrote:
> > I've just tried to load System.Process and its entirely missing on
> > WinHugs, should it be there?
>
> It would be useful, but it's not in any version of Hugs
> (cf http://cvs.haskell.org/Hugs/pages/libstatus.html).

Perhaps the documentation should be updated to say that in
System.Process? It lists itself as portable, when it probably only
works on GHC.

http://haskell.org/ghc/docs/latest/html/libraries/base/System-Process.html

#59: missing and/or erroneous output in deteministic function run from WinHUGS
cmd line!
------------------------------------------------+---------------------------
 Reporter:  ettinger <at> elmgate.eclipse.co.uk      |       Owner:  neil  
     Type:  defect                              |      Status:  new   
 Priority:  critical                            |   Milestone:        
Component:  winhugs                             |     Version:  200609
 Keywords:  inconsistent expression evaluation  |  
------------------------------------------------+---------------------------
--(Output showing the bug is appended below.  It isn't part of the
 program).

 --PLEASE run the function called bug.  It will tell you to type a
 --short expression at the WinHUGS command line.
 --Retry the expression ten times.  I do not get the same result every
 time!
 --Do you find the same problem?  Please, please let me know either way.
 --See below for printout of my "impossible" results.

 --The functions os and s below will be used to demonstrate the WinHUGS
 bug:
 os :: Int -> Int -> Double
 os i j = -22.0/7.1
 s :: [[Int]] -> [[Double]]
 s dat = [[
    sum [ fromIntegral (dat!!i!!j) * os i x * os j y
                               | i <-[0..7] , j <-[0..7] ]
               | x <- [0..7] ]
               | y <- [0..7] ]

#59: missing and/or erroneous output in deteministic function run from WinHUGS
cmd line!
---------------------------------------------+------------------------------
  Reporter:  ettinger <at> elmgate.eclipse.co.uk  |       Owner:  neil                              
      Type:  defect                          |      Status:  new                               
  Priority:  critical                        |   Milestone:                                    
 Component:  winhugs                         |     Version:  200609                            
Resolution:                                  |    Keywords:  inconsistent expression evaluation
---------------------------------------------+------------------------------
-- 
Ticket URL: <http://hackage.haskell.org/trac/hugs/ticket/59>
Hugs <http://www.haskell.org/hugs/>
Hugs 98, an interpreter for Haskell
_______________________________________________
Hugs-Bugs mailing list
Hugs-Bugs <at> haskell.org
http://www.haskell.org/mailman/listinfo/hugs-bugs

#60: I attach a notepad file describing the bug I just tried to paste into a
ticket
------------------------------------------------+---------------------------
 Reporter:  ettinger <at> elmgate.eclipse.co.uk      |       Owner:  neil  
     Type:  defect                              |      Status:  new   
 Priority:  critical                            |   Milestone:        
Component:  winhugs                             |     Version:  200609
 Keywords:  inconsistent expression evaluation  |  
------------------------------------------------+---------------------------

-- 
Ticket URL: <http://hackage.haskell.org/trac/hugs/ticket/60>
Hugs <http://www.haskell.org/hugs/>
Hugs 98, an interpreter for Haskell
_______________________________________________
Hugs-Bugs mailing list
Hugs-Bugs <at> haskell.org
http://www.haskell.org/mailman/listinfo/hugs-bugs

#59: missing and/or erroneous output in deteministic function run from WinHUGS
cmd line!
---------------------------------------------+------------------------------
  Reporter:  ettinger <at> elmgate.eclipse.co.uk  |       Owner:                                    
      Type:  defect                          |      Status:  new                               
  Priority:  critical                        |   Milestone:                                    
 Component:  hugs                            |     Version:  200609                            
Resolution:                                  |    Keywords:  inconsistent expression evaluation
---------------------------------------------+------------------------------
Changes (by neil):

  * component:  winhugs => hugs
  * owner:  neil =>

Comment:

 I have tried this on both Hugs and WinHugs Sep 2006 and cannot replicate,
 can you pleave give your version? And your OS, and processor.

 This looks like its floating point rounding errors etc - and is almost
 certainly not a bug in WinHugs, but in the underlying Hugs, so am
 reassigning it.

-- 
Ticket URL: <http://hackage.haskell.org/trac/hugs/ticket/59>
Hugs <http://www.haskell.org/hugs/>
Hugs 98, an interpreter for Haskell
_______________________________________________
Hugs-Bugs mailing list

#60: I attach a notepad file describing the bug I just tried to paste into a
ticket
---------------------------------------------+------------------------------
  Reporter:  ettinger <at> elmgate.eclipse.co.uk  |       Owner:  neil                              
      Type:  defect                          |      Status:  closed                            
  Priority:  critical                        |   Milestone:                                    
 Component:  winhugs                         |     Version:  200609                            
Resolution:  duplicate                       |    Keywords:  inconsistent expression evaluation
---------------------------------------------+------------------------------
Changes (by neil):

  * resolution:  => duplicate
  * status:  new => closed

Comment:

 Moved the attachment to bug 59, where it belongs.

-- 
Ticket URL: <http://hackage.haskell.org/trac/hugs/ticket/60>
Hugs <http://www.haskell.org/hugs/>
Hugs 98, an interpreter for Haskell
_______________________________________________
Hugs-Bugs mailing list
Hugs-Bugs <at> haskell.org
http://www.haskell.org/mailman/listinfo/hugs-bugs

#59: missing and/or erroneous output in deteministic function run from WinHUGS
cmd line!
---------------------------------------------+------------------------------
  Reporter:  ettinger <at> elmgate.eclipse.co.uk  |       Owner:                                    
      Type:  defect                          |      Status:  new                               
  Priority:  critical                        |   Milestone:                                    
 Component:  hugs                            |     Version:  200609                            
Resolution:                                  |    Keywords:  inconsistent expression evaluation
---------------------------------------------+------------------------------
Old description:

> --(Output showing the bug is appended below.  It isn't part of the
> program).
>
> --PLEASE run the function called bug.  It will tell you to type a
> --short expression at the WinHUGS command line.
> --Retry the expression ten times.  I do not get the same result every
> time!
> --Do you find the same problem?  Please, please let me know either way.
> --See below for printout of my "impossible" results.
>
> --The functions os and s below will be used to demonstrate the WinHUGS
> bug:
> os :: Int -> Int -> Double
> os i j = -22.0/7.1
> s :: [[Int]] -> [[Double]]
> s dat = [[
>    sum [ fromIntegral (dat!!i!!j) * os i x * os j y
>                               | i <-[0..7] , j <-[0..7] ]
>               | x <- [0..7] ]

#50: Hugs's implementation of defaulting does not conform to Haskell 98
--------------------------+-------------------------------------------------
  Reporter:  guest        |       Owner:  nobody               
      Type:  defect       |      Status:  new                  
  Priority:  minor        |   Milestone:                       
 Component:  type system  |     Version:  current              
Resolution:               |    Keywords:  top level overloading
--------------------------+-------------------------------------------------
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System.Process lacking on WinHugs

Re: System.Process lacking on WinHugs

Re: System.Process lacking on WinHugs

[Hugs] #59: missing and/or erroneous output in deteministic function run from WinHUGS cmd line!

Re: [Hugs] #59: missing and/or erroneous output in deteministic function run from WinHUGS cmd line!

[Hugs] #60: I attach a notepad file describing the bug I just tried to paste into a ticket

Re: [Hugs] #59: missing and/or erroneous output in deteministic function run from WinHUGS cmd line!

Re: [Hugs] #60: I attach a notepad file describing the bug I just tried to paste into a ticket

Re: [Hugs] #59: missing and/or erroneous output in deteministic function run from WinHUGS cmd line!

Re: [Hugs] #50: Hugs's implementation of defaulting does not conform to Haskell 98