1.9 could still support the behavior that worked in 1.8 and in CLJS, too, 
or throw a compile time Exception. 

If we had known this change in behavior, fixing it in the codebase wouldn't 
have been much trouble. But a missing default can lead to errors far away 
so it takes time to get to the ground of this.

If there was no (working) other way to provide a default for namespaced 
keys in 1.8 I believe that many people will have tried adding the ns and 
ran with it.


On Wednesday, July 6, 2016 at 2:17:14 PM UTC+2, Alex Miller wrote:
>
> This *is* different than 1.8 (and prior) because it has been buggy since 
> namespaced keys were added (due to a lack of tests - entirely my fault). 
> Nothing was ever documented about this behavior - it was purely accidental 
> and I would consider it in the realm of "unspecified".
>
> In 1.9 I added additional tests and tightened up this code in the process 
> of adding the namespaced key support. 
>

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