cljs.core/mod incorrect for negative numbers

Arithmetic functions only operate on numbers, the behavior is undefined for any other input types.

Found a corner case where this implementation of mod fails - if the modulus is a stringified number then it doesn't work. Clearly a string ought not be passed in the first place, but there is no indication other than a wrong result.

compare (rem 10 "4") and (mod 10 "4") and (mod 10 4)
then try (rem 10 "3") and (mod 10 "3") and (mod 10 3)

Some worked examples here: https://gist.github.com/rm-hull/5708459

Should js/parseInt be used in the body of the mod function to coerce to a number ?

fixed, http://github.com/clojure/clojurescript/commit/14bd16ef5894458a3709ebfee3e78a876938bfa6

Attached patch renames cljs.core/mod to cljs.core/js-mod, along with occurrences in cljs.core.

cljs.core/mod is redefined with fix for negative numbers.