patch 8.2.4427: getchar() may return modifiers if no character is available Commit: https://github.com/vim/vim/commit/ad6c45f62558e03d3e3a927b3fe4dbaf30a36bef Author: zeertzjq <zeertzjq@outlook.com> Date: Sun Feb 20 19:05:10 2022 +0000 patch 8.2.4427: getchar() may return modifiers if no character is available Problem: getchar() may return modifiers if no character is available. Solution: Do not process modifiers when there is no character. (closes https://github.com/vim/vim/issues/9806)

|i+0&#ffffff0|n|t| >c+0&#ffff4012|a|t|;+0&#ffffff0| @66
|i|n|t| |d|o|g|;| @66
|c+0&#ffff4012|a|t| +0&#ffffff0|=| |d|o|g|;| @64
|~+0#4040ff13&| @73
|~| @73
|~| @73
|~| @73
|~| @73
|~| @73
| +0#0000000&@56|1|,|5| @10|A|l@1|