Malli ExceptionInfo is not enough to figure out where the exception occurred

[philoskim]

• malli version: 0.13.0

The following is the test example in clj.

;; malli-test/main.clj
(ns malli-test.main
  (:require [malli.core :as m]
            [malli.instrument :as mi]))

(m/=> power [:=> [:cat :int] [:int {:max 6}]])
(defn power [x] (* x x))

(power 6)
; => 36

;; instrument all registered vars
(mi/instrument!)

(power "6")
;; Error output in REPL
Execution error (ExceptionInfo) at malli.core/-exception (core.cljc:138).
:malli.core/invalid-input

I cannot figure out where the exception occurred.

The following is the test example in cljs by using shadow-cljs.

;; malli_test/main.cljs
(ns malli-test.main
  (:require [malli.core :as m]
            [malli.instrument :as mi]))

(m/=> power [:=> [:cat :int] [:int {:max 6}]])
(defn power [x] (* x x))

(mi/instrument!)

(power "6")
;; Chrome console output
..instrumented malli-test.main/power

cljs$core$ExceptionInfo {message: ':malli.core/invalid-input', data: {…}, cause: null, name: 'Error', description: undefined, …}
  cause : null
  columnNumber : undefined
  data : cljs.core/PersistentArrayMap [count: 3]
  description : undefined
  fileName : undefined
  lineNumber : undefined
  message : ":malli.core/invalid-input"
  name : "Error"
  number : undefined
  stack : "Error: :malli.core/invalid-input\n    at new cljs$core$ExceptionInfo (file:///js/cljs-runtime/cljs.core.js:37369:10)\n    at Function.eval [as cljs$core$IFn$_invoke$arity$3] (file:///js/cljs-runtime/cljs.core.js:37430:9)\n    at Function.eval [as cljs$core$IFn$_invoke$arity$2] (file:///js/cljs-runtime/cljs.core.js:37426:26)\n    at Function.eval [as cljs$core$IFn$_invoke$arity$2] (file:///js/cljs-runtime/malli.core.js:1253:26)\n    at Function.eval [as cljs$core$IFn$_invoke$arity$2] (file:///js/cljs-runtime/malli.core.js:1280:29)\n    at Object.G__28317__delegate (file:///js/cljs-runtime/malli.core.js:12285:48)\n    at Object.G__28317 (file:///js/cljs-runtime/malli.core.js:12310:27)\n    at eval (file:///js/cljs-runtime/malli_test.main.js:8:17)\n    at eval (<anonymous>)\n    at goog.globalEval (file:///Users/philos/work/malli-test/resources/public/js/main.js:434:11)"

I cannot figure out where the exception occurred as well.

How can I figure out where the exception occurred?

[dvingo]

For clojure you can use https://clojuredocs.org/clojure.core/*e

For cljs it looks like you don't have cljs devtools installed, you can find instructions on getting setup here:

https://github.com/metosin/malli/blob/master/docs/clojurescript-function-instrumentation.md

with details on how to find the source of your error in your codebase.

[ikitommi]

How does this look with the new development mode?