What are the breaking changes in clojure 1.3?

Question

I have been having trouble keeping up with the list of changes in 1.3 and most importantly the changes that require me to change my code.

• What has changed,
• what is about to change,
• where can I get up to date lists of these?

Answer 1

Breaking changes to date:

• Math ops no longer promote into bignums.

• Math ops no longer narrow the result to the smallest type that can hold them.

• Vars will no longer default to being dynamically bindable. Add ^:dynamic when needed.