DIP 1021--Argument Ownership and Function Calls--Final Review

[Olivier FAURE]

On Monday, 16 September 2019 at 10:06:55 UTC, Walter Bright wrote:
> DIP 1021 can be experimented with as the code is now in the 
> compiler and enabled with -preview=useDIP1021. I'd expect some 
> trouble with it as it doesn't have much wear on the tires.

Sincere question: do you want people to experiment with it? If 
so, in what way? People have already come up with holes in your 
proposal, and you've essentially said that you didn't mind them; 
so what would people confirming that these holes still exist in 
the preview implementation change?