patch 9.0.0053: E1281 not tested with the old regexp engine Commit: https://github.com/vim/vim/commit/3a393790a4fd7a5edcafbb55cd79438b6e641714 Author: Dominique Pelle <dominique.pelle@gmail.com> Date: Thu Jul 14 17:40:49 2022 +0100 patch 9.0.0053: E1281 not tested with the old regexp engine Problem: E1281 not tested with the old regexp engine. Solution: Loop over the values of 'regexp'. (Dominique Pell?, closes https://github.com/vim/vim/issues/10695)

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