On Dec 23, 2012, at 8:50 AM, Peter Taoussanis wrote:
> Were any breaking changes made between alpha3 and RC1? I haven't spent much
> time trying to track down causes so it's very possible I'm mistaken, but I
> seem to be running into some weird behavior under RC1.
>
> Specifically, seem to be having trouble with
> `ring.middleware.reload/wrap-reload`:
> Exception in thread "main" java.lang.IllegalArgumentException: contains? not
> supported on type: clojure.lang.LazySeq, compiling:(routes.clj:294:3)
> Line 294 is where the wrap-reload is applied, and this compiles fine under
> alpha3.
Peter:
This exception you show above is new with this commit for CLJ-932:
https://github.com/clojure/clojure/commit/3acb6ee7ec5c295ae14de861d03a5efd115a5968
http://dev.clojure.org/jira/browse/CLJ-932
It appears that somewhere in ring or other code you are using, there is a call
to contains? on a lazy sequence. Before this always silently returned false,
but now it throws an exception, in hopes of catching bugs in code where
contains? is called on collections for which it doesn't make sense.
Andy
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