[Issue 20696] Should error when retrieving mangling while the type is not yet final

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20696

Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://issues.dlang.org/sh
                   |                            |ow_bug.cgi?id=17451

--