Repl in node debug can only be exited using ctrl-c

[srathbun]

Node debug allows you to drop into a repl at your current location using the repl command. To exit this, the only allowed method is to use ctrl-c since .exit does not work. As shown here, the repl listens to SIGINT, but sending it a sigint with kill, breaks the debugger.

I'm not sure, but digging into the repl source seems to indicate that it only pays attention to SIGINT from the attached terminal, instead of in general. This is a problem if the debugger is a child process of a script, and SIGINT on the script causes an exit.

If .exit acted the same as ctrl-c during debugging, this problem would be solved.

[TooTallNate]

Looks like we should be using the repl's exit event there instead of the readline instance's SIGINT event... I'll try to whip up a patch.

[sideshowcoder]

This has been present for quite some time now, and I just ran into typing exit a couple of times again. Is their a way to help move this little annoyance out of the way?

[trevnorris]

@tjfontaine you have any problems with #5637 ?

[jasnell]

New PR opened over in nodejs/node. Will continue to track this discussion from there. nodejs/node#2369