patch 9.0.0294: crash when 'cmdheight' is 0 and popup_clear() used Commit: https://github.com/vim/vim/commit/43568648dfefe5796dc3fe8fe711135eb20d9eb6 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Aug 28 13:02:45 2022 +0100 patch 9.0.0294: crash when 'cmdheight' is 0 and popup_clear() used Problem: Crash when 'cmdheight' is 0 and popup_clear() used. Solution: Reset "message_win" when the message popup is cleared. Close the popup when 'cmdheight' is non-zero. Add a screendump test.

|x+0&#ffffff0@4>x@1| |1+0&#ffff4012|2|3| +0&#ffffff0|x| @61
|x@5| |1+0&#ffff4012|2|3| +0&#ffffff0|x| @62
|x@4| |1+0&#ffff4012|2|3| +0&#ffffff0|x| @63
|x@4|1+0&#ffff4012|2|3| +0&#ffffff0|x| @64
|x@4|2+0&#ffff4012|3| +0&#ffffff0|x| @65
|x@3| |3+0&#ffff4012| +0&#ffffff0|x@1| @65
|x@2| |1+0&#ffff4012| +0&#ffffff0|x@2| @65
|x@1| |1+0&#ffff4012|2|x+0&#ffffff0@3| @65
|x| |1+0&#ffff4012|2|3|x+0&#ffffff0@3| @65
@1|1+0&#ffff4012|2|3| +0&#ffffff0|x@3| @65
|~+0#4040ff13&| @73
| +0#0000000&@56|1|,|6| @10|A|l@1|