Oh wow. There I was, about half an hour into a session with an
interactive Haskell program (you can have the source code if you want,
but I can't give you a trace of what I did in that session),
compiled with the very very latest version of GHC (4.03, patchlevel 0,
checked out of the CVS repository yesterday, yes I know this isn't
exactly guaranteed to work), and GHC came to an abrupt end with the above
message.
Also the code I had in that program to handle interrupts no longer works.
(Ctrl/C's are just ignored, even though I've done the relevant
Posix.installHandler. Has anything recently changed in this area?