[Issue 21546] covariant return checks for functions wrong if returning by ref

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21546

Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|ref returning delegate      |covariant return checks for
                   |circumvents immutable       |functions wrong if
                   |(@safe won't help)          |returning by ref

--