Can someone tell me what the compiler thought I was trying to do?

[mw]

On Wednesday, 19 October 2022 at 01:38:27 UTC, Adam D Ruppe wrote:
> On Wednesday, 19 October 2022 at 01:34:54 UTC, mw wrote:
>> Is there any (design) doc about this?
>
> scroll up, click the link from this very thread.
>
> https://github.com/dlang/DIPs/blob/master/DIPs/accepted/DIP1038.md#design-goals-and-possible-alternatives

"""
Rather than make either sacrifice, this DIP proposes a design 
that allows both rigor and simplicity to be maintained, and 
reserves the possibility for a future DIP to allow @mustUse as a 
function attribute.
"""

Another future DIP? I think this DIP is flawed for not using 
"@mustUse as a function attribute"