phobos's circle CI runs a busted version of DMD

[Salih Dincer]

On Wednesday, 11 January 2023 at 23:22:04 UTC, Walter Bright 
wrote:
> On 1/11/2023 12:55 PM, Paul Backus wrote:
>> If we rewrite deadalnix's example using this equivalence, we 
>> get the following code:
>> 
>>      ushort ee = 1028;
>>      ee = cast(ushort)(ee << 5U);
>>      ee = cast(ushort)(ee >> 5U);
>>      writeln(ee);
>> 
>> ...which prints 1028. So the behavior of the original example 
>> is unambiguously a violation of the language spec.
>
> That's right. It also happens for ubyte operations.

```d
     ubyte u = 128;
     u.writef!"%08b: "; writeln(u);
     typeof(u >> 1U).stringof.writeln;
     u >>= 1U;
     u.writef!"%08b: "; writeln(u);

     byte b = -128;
     b.writef!"%08b: "; writeln(b);
     typeof(b >> 1U).stringof.writeln;
     b >>= 1U;
     b.writef!"%08b: "; writeln(b);
```

The problem is that it shift via int first.  Then the type is 
converted to whatever it is, right?  I think there is no error 
because >>> should be used instead of >>

```d
     u >>>= 1U;
     assert( u == 64 );
```

SDB at 79