Hi all, The other day, I wrote the following program in /tmp/test.hs --8<---------------cut here---------------start------------->8--- main = error "An Error message" --8<---------------cut here---------------end--------------->8--- Then I ran the following: ,---- | gds@lithium:/tmp$ runghc ./test.hs `seq 1 100000` | gds@lithium:/tmp$ ghc -o test test.hs | gds@lithium:/tmp$ ./test `seq 1 100000` | test: An Error message | gds@lithium:/tmp$ `---- Notice that when I use runghc, my main function doesn't appear to run at all. But when I run the compiled program, my main function does seem to run, and produce the error message I expected. It seems to me like runghc can't cope with that large a number of arguments or size of argument string, or similar. That seems entirely reasonable, but if so, then might it be a good idea to have an error message when we accidentally hit that limit? I'm using ghc 7.6.2 on Ubuntu 13.04. Thanks! Gareth.