Can the "Key must be integer" error message be improved?

Question

The Key must be integer error message often catches me off guard and I forget what it meant.

Could this message be improved so that it is a little more self-describing?

e.g. Tried to assoc a non-integer key to a vector.

Thanks - V

Answer 1

Logged as https://clojure.atlassian.net/browse/CLJ-2710