Hello,
I have a question about obtaining a backtrace when
catching errors.
consider the following snippet of code:
;;;;;;;;;;;;;;;;;;;
(defun top ()
(multiple-value-bind (ret err) (ignore-errors (foo))
(when err (format t "Got error <~A>~%" err))
;; HERE
ret))
(defun foo () (bar 0))
(defun bar (x) (/ 1 x)) ;; bar causes an error for x=0
;;;;;;;;;;;;;;;;;;;
This catches and prints a division by 0 error when (top)
is evaluated.
But is there some way to obtain a backtrace leading to
the error (eg, to a string) at the location denoted by "HERE"?
This would be very useful for diagnosing infrequent errors
in server apps, eg.
Obviously, putting in (debug:backtrace) doesn't work because
we are out of the frame (?) where the error occurred.
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