Fri Jan 18 09:17:54 PST 2008 simonpj at microsoft.com
* Wibble to SetLevels.abstractVars
I've gotten this wrong more than once. Hopefully this has it nailed.
The issue is that in float-out we must abstract over the correct
variables.
M ./compiler/simplCore/FloatOut.lhs -1 +1
M ./compiler/simplCore/SetLevels.lhs -5 +7