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));