Hello, I'm still experiencing problems with toplevel hangs in 4.02 (it seems it is not fixed in 4.02.1). I use utop with .ocamlinit (pretty similar to http://janestreet.github.io/installation.html), but it is not related to utop. Something wrong with camlp4. The minimal steps to reproduce: $ ocaml OCaml version 4.02.1 # #load "dynlink.cma";; # #load "camlp4o.cma";; Camlp4 Parsing version 4.02.1 # #quit;; ... HANG... I see this on Linux and Mac OS X. Is there any workaround for this? I can't switch to 4.02 due to this issue. Thanks