I'd say that's a bug with 1.8 rather than 1.9

> On 6 Jul 2016, at 13:01, Leon Grapenthin <grapenthinl...@gmail.com> wrote:
> 
> @Alex Miller: Please reconsider. What you state does not apply to 1.8, i. e. 
> the ns is required in :or and such code is broken in 1.9
> 
> 1.8/1.9 differences:
> (let [{:keys [a/b] :or {b 42}} {}]
>   b)
> =>
> 1.8: nil
> 1.9: 42(let [{:keys [a/b] :or {a/b 42}} {}]
>   b)
> =>
> 1.8: 42
> 1.9: nil
> 
> 
> 
> 
> On Wednesday, July 6, 2016 at 1:43:46 PM UTC+2, Alex Miller wrote:
> This is the correct behavior. The :or map keys are always the local names 
> being bound (not the keys being looked up in the map).
> 
> > On Jul 6, 2016, at 4:40 AM, Leon Grapenthin <grapent...@gmail.com> wrote:
> >
> > Another small bug report:
> >
> > (let [{:keys [a/b] :or {a/b 42}} {}]
> >   b)
> >
> > Evaluates to nil, but should evaluate to 42
> >
> > (let [{:keys [a/b] :or {b 42}} {}]
> >    b)
> >
> > Evaluates to 42, but should evaluate to nil.
> 
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