Main thread garbage collected

Compile the following module:

main = interact id

ghc-6.2.1 Test.hs -o test
./test
^C
test: internal error: main thread has been GC'd
    Please report this as a bug to glasgow-haskell-bugs@xxxxxxxxxxx,
    or http://www.sourceforge.net/projects/ghc/

So you run the program, it does nothing as expected. You hit ^C to kill
the program and it it reports the message above.

This appears to have been fixed in 6.3 so just consider this a
regression test.

Duncan