[Issue 20354] interface is not supported by CanCAS in core.internal.atomic

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20354

lempiji at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |lempiji at gmail.com
           Severity|major                       |regression

--- Comment #1 from lempiji at gmail.com ---
I have the same problem. It is a regression.

https://issues.dlang.org/show_bug.cgi?id=20354

Is it safe to add 'is (T == interface)' to CanCAS?

https://github.com/dlang/druntime/blob/22169b10f71d401eb058cd040e967664a50e60ad/src/core/internal/atomic.d#L683

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