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<blockquote><p><i>Sorry, but that makes no sense in relation to what I
+ posted.</i></blockquote>

<p>That's why I asked what you considered to be a bug. My guess: The l
+ack of copying by operators causes other operators to behave differen
+tly than you'd expect.

<p>If you deliberately hide information, you only have yourself to bla
+me for any ensuing confusion

 
<blockquote><p><i>Sorry, but that makes no sense in relation to what I
+ posted.</i></blockquote>

<p>Then what you posted incorrectly assumes lvalue results only affect
+ concatenation.