Dominique wrote:

> This command gives an internal error:
> 
>   :echo empty(test_void())
>   E685: Internal error: f_empty(UNKNOWN)
>   1
>   Press ENTER or type command to continue
> 
> Same kind of internal error at least for:
> 
>   :echo empty(test_unknown())
>   :echo type(test_void())
>   :echo type(test_unknown())
> 
> Internal errors should never happen. But I suppose
> that this use of test_void() or test_unknown() does
> not make sense. And that it should not be possible
> to reproduce this internal error without calling test_void()
> or test_unknown(). Correct? or should we fix anything here?

Good point.  I think it's better to give this error without calling
abort().  Otherwise we can't even test how they work.

I'll make a patch.  Are there any others?

-- 
Don't drink and drive.  You might hit a bump and spill your beer.

 /// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net   \\\
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