Data constructor not in scope: `:='

[Jan-Friso Evers]

Compilation of an old program (NAS-Benchmark) with ghc 3.x and 4.x
terminates with:

Data constructor not in scope: `:='

Using ghc-0.29 works fine.

The code looks like this:

let
...
   xa = ...

in  
  array (1, n) [i := (xa!i :+ xa!(i+n)) | i <- [1..n]]

How can I fix this problem ?

Jan-Friso Evers