[Issue 15647] Casting from one C++ interface in a hierarchy to another is a noop

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15647

--- Comment #1 from Walter Bright <bugzilla at digitalmars.com> ---
https://github.com/D-Programming-Language/dmd/pull/5402

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