phobos's circle CI runs a busted version of DMD

[Max Haughton]

On Wednesday, 11 January 2023 at 01:03:33 UTC, deadalnix wrote:
> Sample code:
> ```d
>     ushort ee = 1028;
>     ee <<= 5U;
>     ee >>= 5U;
>     writeln(ee);
> ```
>
> Regular compiler: https://godbolt.org/z/TcbjP76fW (prints 1028)
> Circle CI: 64516 .
>
> Someone, the compiler manages to do a signed arithmetic shift 
> on an unsigned.

https://godbolt.org/z/M3fGE9bqY

"All versions: Success with output: 64516" from run.dlang.io