> Does this mean you see the problem in stock Emacs 28 built from the
> emacs-28 branch of the upstream Emacs repository on Savannah?
But it doesn't apply any custom changes, and to build emacs manually I'd anyway have to get the same environment where it's built and do almost the same things - nixos is a bit more complex system than usual linux.
> Can you type C-g and show the backtrace?
Tried to do it with (toggle-debug-on-quit), but just got 'Debugger entered--Lisp error: (quit)'
С уважением, Курневский Евгений.