[clisp-list] capturing backtraces and continuing

[Scott W. <or...@gm...>]

(with-output-to-string (s)
  (let ((*error-output* s))
    (abort-on-error (error "foo"))))
=>

I can see that clisp aborts to the toplevel without finishing
with-output-to-string, which is why the form returns nothing. I confess
to knowing little about common lisp conditions and error handling. How
do I wrap a function call so that any errors that occur during the
function trigger a backtrace printed to a string, and execution
continues as though the function had returned?