patch 8.2.4338: an error from an expression mapping messes up the display Commit: https://github.com/vim/vim/commit/74a0a5b26d0180f3ea89e9495dff6a26f0df23cb Author: Bram Moolenaar <Bram@vim.org> Date: Thu Feb 10 14:07:41 2022 +0000 patch 8.2.4338: an error from an expression mapping messes up the display Problem: An error from an expression mapping messes up the display. Solution: When the expression results in an empty string return K_IGNORE. In cmdline mode redraw the command line. (closes #9726)

>x+0&#ffffff0@36|+| @36
|(+0#ffffff16#e000002|x+0#0000000#ffffff0@36|)| @35
|~+0#4040ff13&| @73
|~| @73
|~| @73
|~| @73
|~| @73
|~| @73
|~| @73
| +0#0000000&@56|1|,|1| @10|A|l@1|