[Issue 23422] uniq backward iteration has different elements to forward iteration

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23422

FeepingCreature <default_357-line at yahoo.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|uniq loses position when    |uniq backward iteration has
                   |chained to joiner           |different elements to
                   |                            |forward iteration

--