Yasohiro Matsumoto wrote:
> When passing same Dictionary/List to expand(), it breaks reference counter.
>
> let o = {"a":{"b":"B"}}
> call extend(o, o)
> echo o.a.b <= crash
>
> https://gist.github.com/2578755
>
> Please check and include.
Thanks for the fix! Can you also write a test for this?
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