Yes, it's a known bug. GHC just inlines over and over again. It's discussed in "secrets of the GHC inliner". It's quite tiresome to fix without compromising something else, and I have never found a real program (rather than 'russel') that tickles the bug. I'd better document it, though Simon | -----Original Message----- | From: Christian Maeder [mailto:maeder@Informatik.Uni-Bremen.DE] | Sent: 10 October 2002 16:02 | To: glasgow-haskell-users@haskell.org | Subject: non-termination during compilation | | Hi, | | the following example causes ghc to loop (or run rather long): | | --- snip --- | | data U = MkU (U -> Bool) | | russel :: U -> Bool | russel u@(MkU p) = not $ p u | | x :: Bool | x = russel (MkU russel) | | --- snip --- | | I think, a compiler should always terminate, shouldn't it!? | | Compilation succeeds for "russel $ MkU russel" instead of "russel (MkU | russel)". | (Surely, x is bottom and therefore the example is senseless) | | Regards Christian | _______________________________________________ | Glasgow-haskell-users mailing list | Glasgow-haskell-users@haskell.org | http://www.haskell.org/mailman/listinfo/glasgow-haskell-users