is MySQL bug #44373 really a bug?

[Zardosht Kasheff]

Hello,

Some time back, I filed MySQL bug #44373
(http://bugs.mysql.com/bug.php?id=44373), because comments in the
Handler API led me to believe it is a bug. However, I was never really
sure. I may be misunderstanding the intended API contracts. What I am
wondering is this. Is my understanding correct, and this is a bug, or
is my understanding of the behavior of column_bitmaps_signal with
respect to the handler::position API not correct?

Thanks
-Zardosht