patch 8.0.0732: when updating a buffer modeless selection is lost commit https://github.com/vim/vim/commit/80dd3f9d41ce2ff6ab3544cdb266627bbdfc34a6 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jul 19 12:51:52 2017 +0200 patch 8.0.0732: when updating a buffer modeless selection is lost Problem: When updating a buffer for a callback the modeless selection is lost. Solution: Do not insert or delete screen lines when redrawing for a callback and there is a modeless selection.

manual 1 aa
-1
3 cc
1 aa
marker 2
1
1
0
indent 2
1
folding 9 ii
    3 cc
7 gg
8 hh
expr 2
1
2
0
	Test fdm=indent START
	line3
	line4
Test fdm=indent and :move bug END
line2