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Showing content from https://lists.gnu.org/archive/html/emacs-devel/2022-11/msg00204.html below:

Re: [PATCH] On the nasty "ghost key" problem on NS


On Nov 4, 2022, at 08:32, Po Lu <luangruo@yahoo.com> wrote:


Kai Ma <justksqsf@gmail.com> writes:

I am sorry, but this patch breaks compose processing.  So we're


certainly not installing anything like this in Emacs 29.

I will try to figure out a way to reproduce the bug and why it actually


happens.

Thanks!

I’ve narrowed the problem further to [firstRectForCharRange]. Some calls never return. Activating an input method makes Emacs issue excessive calls to this method. Specifically, the following code gets stuck somewhere.

  if (WINDOWP (echo_area_window) && ! NILP (call0 (intern ("ns-in-echo-area"))))

    win = XWINDOW (echo_area_window);

  else

    win = XWINDOW (FRAME_SELECTED_WINDOW (emacsframe));


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