Problem with using BNF converter tool

[Simon Marlow]

> I am sending this here and not to the bugs list under the 
> assumption that I am 
> doing something wrong...
> 
> I am trying to use the BNF converter tool. When I try it on 
> simple examples, the 
> first step (generation of the .y and .x files) goes through. 
> When I run happy on 
> the generated .y file, I get the following error:
> 
> happy.bin: internal error: stg_ap_pp_ret
>     Please report this as a bug to glasgow-haskell-bugs at haskell.org,
>     or http://www.sourceforge.net/projects/ghc/
> 
> Any help/guidance would be very appreciated.

This should never happen.  Details please:  what version of GHC, did you
compile Happy from source or download binaries, if source: which
version, can you send us the complete .y input to Happy, and anything
else that might be relevant.  Basically anything we need to reproduce
the bug here.

Cheers,
	Simon