I'm getting an error when trying to call a multimethod in a certain
scenario. I'm unfortunately not able to reproduce this when running it
as a test case with v8. But, I was able to trim it down to the following
test case which fails for me in a browser (with a connected repl).
(defmulti foo (fn [a b] [(:foo a) (:foo b)]))
(defmethod foo [:foo :bar] [a b] :foobar)
(defmethod foo :default [a b] :default)
;; this fails with an error - expecting default case
(foo {} {})
;; succeeds -> :foobar
(foo {:foo :foo} {:foo :bar})
However, with slight modifications, it works for me.
(defmulti bar (fn [& args] (vec (map :foo args))))
(defmethod bar [:foo :bar] [a b] :foobar)
(defmethod bar :default [a b] :default)
;; succeeds -> default case
(bar {} {})
Interestingly enough, it works with this variation too:
(defmulti baz (fn [a b] (vector (:foo a) (:foo b))))
(defmethod baz [:foo :bar] [a b] :foobar)
(defmethod baz :default [a b] :default)
;; also succeeds -> default case
(baz {} {})
The error that I'm getting when it fails is:
obj is undefined
return obj[goog.UID_PROPERTY_] || (obj[goog.UID_PROPERTY_] = ++goog.uidCounter_
(This is in the definition of goog.getUid)
I tried to debug a little bit, and it looks like it's failing when
looking up the multimethod in the cache. The obj is undefined at that
point.
Robert
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