On Sat, May 23, 2009 at 5:35 PM, Bill St. Clair <billstclair@gmail.com> wrote:

I'm running the latest CVS version of slime, "2009-05-19" in a fairly
recent CCL (OpenMCL), "Version 1.3-r11936 (DarwinX8664)".

I would expect the following code to bring up an SLDB buffer with a
break loop in the repl:

(setq *break-on-signals* t)

(handler-case (error "foo") (error () 1))

Instead, it returns 1. This is not surprising given this in swank-openmcl.lisp:

(defun break-in-sldb (x y &rest args)
(let ((*sldb-stack-top-hint* (or *sldb-stack-top-hint*
(ccl::%get-frame-ptr))))
(apply #'cerror y (if args "Break: ~a" x) args)))

I'm debugging some server code that really needs to catch all errors.
This makes it rather difficult. The only workaround I've discovered is
to set swank-backend::*break-in-sldb* to NIL and use CCL's builtin
debugger. Not my favorite debugging environment.

Clues, anyone?

I could probably fix this myself, and if nobody else has done it, I
may be forced to, but I'd rather make progress on my application code.

-Bill

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