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)

>1+0&#ffffff0| @73
|2| @73
|3| @73
|4| @27|6+0#0000001#ffd7ff255@5| @9| +0#0000000#a8a8a8255| +0&#ffffff0@28
|5| @27|7+0#0000001#ffd7ff255@4| @10| +0#0000000#a8a8a8255| +0&#ffffff0@28
|6| @27|8+0#0000001#ffd7ff255@2| @12| +0#0000000#0000001| +0&#ffffff0@28
|7| @27|9+0#0000001#ffd7ff255@15| +0#0000000#0000001| +0&#ffffff0@28
|8| @73
|9| @73
|:| @55|1|,|1| @10|T|o|p|