Negative doubles or floats in Haskell (macports)

Question

Why do I get a segmentation fault when I try to show a negative double or float? There is no problem for negative integers.

Prelude> let a = 4
Prelude>         


        

Answer 1

GHC on MacPorts seems to be broken. See https://trac.macports.org/ticket/25265

Consider instead installing the Haskell Platform from haskell.org, which includes GHC 6.12.3 and a bundle of Haskelly goodies.

• Info: http://hackage.haskell.org/platform/
• Link: http://hackage.haskell.org/platform/mac.html