[OT] OT: Null checks.

[Kagamin]

On Tuesday, 6 May 2025 at 06:11:29 UTC, Walter Bright wrote:
> What you can do is override the default assert behavior by 
> inserting your own assert handler by calling 
> `core.exception.assertHandler()`. Be sure to set 
> `-checkaction=D`
>
> Then you can have assert() behave however you want.

https://github.com/dlang/dlang.org/pull/2702
> To have a nice message, use checkaction to change it to what is 
> desired.

As I understand, these functions are checkaction implementation, 
e.g. dmd doesn't call them by default.