#3981: Value of function differs for arguments of the same value
------------------------+---------------------------------------------------
Reporter: kirstin | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 6.12.1 | Keywords:
Os: Linux | Testcase:
Architecture: x86 | Failure: Incorrect result at runtime
------------------------+---------------------------------------------------
I'm getting a different result from the same function depending on whether
I pass a value or a function that returns that value. This
happens with ghci and ghc.
I would expect to the the same result.
Given:
{{{
x = [(),(),(),(),(),(),(),(),(),(),(),(),(),(),()]
choose 0 _ = 0
choose _ 0 = 0
choose n m = factorial n `div` (factorial (n - m) * factorial m)
factorial n = product [1..n]
}}}
Then:
{{{
> length x
=> 15
> choose (length x) 2
=> -5
> choose 15 2
=> 105
}}}
Info:
Debian Squeeze: {{{Linux velox 2.6.32-trunk-686 #1 SMP Sun Jan 10 06:32:16
UTC 2010 i686 GNU/Linux}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3981>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
_______________________________________________
Glasgow-haskell-bugs mailing list
[email protected]
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
