bug#18939: 24.4; middle-click sometimes pastes data other than the PRIMARY selection

[Stefan Monnier]

> This occurs very often, and I've finally managed to find a way to
> reproduce the bug:

> 1. Open a file containing a line, say "foo", with "emacs -Q".

> 2. When the cursor is at the beginning, type C-k.

> 3. Select text in some other window.

> 4. Left-click in the initial Emacs window.

> 5. Middle-click in the initial Emacs window.

> Instead of pasting the selected text, this pastes what was cut
> with C-k.

I can't reproduce it here.
I did the following:

% emacs24 -Q    ; That's Debian's Emacs-24.4
M-< C-k
C-x 5 b *Messages*
drag-mouse-1               [ in *Messages*, to select "information" ]
mouse-1                    [ in *scratch* ]
mouse-2                    [ in *scratch* ]

Result: it inserted "information", as it should.


        Stefan