bug#6637: 24.0.50; kill ring being seriously polluted

[Chong Yidong]

Tim Van Holder <tim.vanholder@gmail.com> writes:

> The following is something I do a lot as part of code editing:
>  1) copy/kill something
>  2) yank the copied/kill text
>  3) select certain portions and replace them as needed for that copy
>  4) go back to step 2) if needed
> The new behaviour interferes with this (and I don't see how it can do
> anything but interfere when pc-selection-mode is active).

Your description is too vague.  Please provide a step by step recipe
demonstrating the problem, starting with `emacs -Q'.