patch 8.2.1677: memory access errors when calling setloclist() in autocommand Commit: https://github.com/vim/vim/commit/4d170af0a9379da64d67dc3fa7cc7297956c6f52 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Sep 13 22:21:22 2020 +0200 patch 8.2.1677: memory access errors when calling setloclist() in autocommand Problem: Memory access errors when calling setloclist() in an autocommand. Solution: Give an error if the list was changed unexpectedly. (closes https://github.com/vim/vim/issues/6946)

/*
 * An extremely simple program to make the cursor blink in an xterm.
 * This is useful when the cursor is hard to spot in a highlighted file.
 * Start in the background: "blink&"  Stop by killing it.
 * Bram Moolenaar  980109  (based on an idea from John Lange).
 */

#include <stdio.h>
#include <unistd.h>

	int
main(void)
{
	while (1)
	{
		printf("\e[?25h");
		fflush(stdout);
		usleep(400000);		/* on time */
		printf("\e[?25l");
		fflush(stdout);
		usleep(250000);		/* off time */
	}
	return 0;
}