Swank server dies with any error in REPL

[bruce li]

Hi, there,
I'm pretty new to ECL. I'm currently considering embedding ECL in a
game engine. When I interactively interrupt the program and drop into
the repl, I load up swank with quicklisp and create swank server with
(swank:create-server :port 4005).  I can connect to it from SLIME. But
any error in the statement, either by deliberately typing sth wrong,
will cause swank server to close instead of dropping into the
debugging environment. I have no idea why this happens. It turns out
that if I start swank on a different thread with
mp:process-run-function, it goes well. But since the game engine is
based on OpenGL, multithreading rendering isn't an option. I wonder if
there is any way to get around the swank server and enable its
debugger when it encounters error.

Thanks,
Bruce