Even such a filter is too often useless. Like, 4 out of 5 times. I rely more on logging and parameter inspection. E.g.:

  (defn foo [a b]
    (def a a)
    (def b b)
    (/ a b))

If the function fails, I have captured its input parameters right before the exception occurred and now I can inspect it from the REPL if 'b' is 0. From the REPL I can change the value of 'b' with simple `(def b 42)` or change the very definition of 'foo' and re-evaluate it again on the REPL with simple `(foo a b)`.

I even made myself an elisp function for inserting the '(def a a)' into the code https://github.com/Bost/corona_cases/blob/master/.dir-locals... (enjoy).