commit https://github.com/vim/vim/commit/9bd547aca41799605c3a3f83444f6725c2d6eda9 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Apr 1 21:00:48 2016 +0200 patch 7.4.1692 Problem: feedkeys('i', 'x') gets stuck, waits for a character to be typed. Solution: Behave like ":normal". (Yasuhiro Matsumoto)

--- a/src/eval.c
+++ b/src/eval.c
@@ -11368,7 +11368,10 @@ f_feedkeys(typval_T *argvars, typval_T *
 
 		/* Avoid a 1 second delay when the keys start Insert mode. */
 		msg_scroll = FALSE;
+
+		++ex_normal_busy;
 		exec_normal(TRUE);
+		--ex_normal_busy;
 		msg_scroll |= save_msg_scroll;
 	    }
 	}