module containing GADTs no longer compiles in ghc 6.8.0

Ian Lynagh igloo at
Fri Sep 28 07:03:01 EDT 2007

Hi Daniel,

On Thu, Sep 27, 2007 at 07:45:58PM -0300, Daniel Gorín wrote:
> After replacing them with case statements everything compiles fine.... as long 
> as I don't turn on -O2 optimizations :(
> This boiled-down example illustrates my problem:

Thanks for the testcase! I've trac'ed it here:


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