GHC and GHCi hang when compiling simple program
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When interpreting the following four-line program using GHCi on Windows, GHCi hangs, never completing compilation and giving no output: data Paradox = Roll (Paradox -> Int) unroll (Roll x) = x selfapply x = unroll x x uhoh = selfapply (Roll selfapply) If I add a simple main method of the form 'main = do print (fst ("Hello world", uhoh))', and then compile with GHC, it hangs as well. However, if I use a main method which does not mention uhoh, such as 'main = do print "Hello world"', and then compile with GHC, compilation is successful. However, in this case, compilation with GHCi still hangs. As it happens, I have seen this bug in both versions 6.4 and 6.4.1 of GHC for Windows. -Sridhar Ramesh, [email protected]
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