>> I am very confused that ctrl+z didn't teminate the input of >> console,it result in a dead loop. > > I think this is a library bug, I noticed it some times, but I > didn't file it. Maybe it's worth filing in Bugzilla. I have added this bug report, is this the issue you are seeing/having? http://d.puremagic.com/issues/show_bug.cgi?id=10467 Bye, bearophile