patch 8.2.4204: screenpos() has non-zero row for invisible text Commit: https://github.com/vim/vim/commit/7924a17791217d50be5a91989a9641bf68e7a735 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Jan 24 16:15:15 2022 +0000 patch 8.2.4204: screenpos() has non-zero row for invisible text Problem: screenpos() has non-zero row for invisible text. Solution: Only add the window row when the text is visible. (closes https://github.com/vim/vim/issues/9618)

Test for writing and reading a file of over 100 Kbyte

1 line: "This is the start"
3001 lines: "This is the leader"
1 line: "This is the middle"
3001 lines: "This is the trailer"
1 line: "This is the end"

STARTTEST
:%d
aThis is the start
This is the leader
This is the middle
This is the trailer
This is the endkY3000p2GY3000p
:w! Xtest
:%d
:e! Xtest
:.w! test.out
3003G:.w >>test.out
6005G:.w >>test.out
:qa!
ENDTEST