...func.setUnsafe())
            error("this is the diagnostic regression error");
}


If I understand this correctly the...

...like we do have some kind of regression in GDC here as well. At least...

...the codebase (BTW allowing any kind of regression also make it a lot harder to...

...github.com/dlang/phobos/commit/2f27e58b0e498aeecfdbce5178ad0bb700ab779c Add regression test for issue 16663

https://github.com...

...M std/uni.d

  Log Message:
  -----------
  Add regression test for issue 16663


  Commit: 73b699de123a3f8d2e38f0d63735865fa78c03ce
      https...

BTW, my uncle was a research chemist for a pharmaceutical company in Switzerland. He told...

On the other hand, we cannot progress the language by freezing it. After all, one...

...is created, but comes with it a regression that some unusual (but correct) code is...

That's the point of the flag. It can be done on the user's...

On a more serious note - not breaking things is much more important than fixing things...