[Haskell-beginners] main: <<loop>> ....?

[Daniel Fischer]

On Monday 22 August 2011, 09:45:46, Sunil S Nandihalli wrote:
> Hi Benjamin,
>  It was longer than I could post here .. but here it is ..
> 
> https://github.com/sunilnandihalli/is2/blob/master/main.hs

Sorry for the line-mangling:


advanceSweepLineTo front@(rangeToOpenTrapeziaMap,curSweepLineLocation) 
newSweepLineLocation = let delta = newSweepLineLocation - 
curSweepLineLocation
                                                                                                  (expandedTrapezia',_) 
= expandToAdvance front newSweepLineLocation
                                                                                                  expandedTrapezia 
= trace (" expandedTrapezia : "++show expandedTrapezia') 
                                                                                                                     $ 
expandedTrapezia 


There you have an infinite loop of the simple type,

expandedTrapezia = expandedTrapezia

On the right hand side, you're  missing a ', should be expandedTrapezia'

I don't know when you've added the trace calls, so there might well be 
another problem still.