commit https://github.com/vim/vim/commit/a742e084b677f76c67e9e52c4f9fb9ab24002e20 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Apr 5 21:10:38 2016 +0200 patch 7.4.1711 Problem: When using try/catch in 'statusline' it is still considered an error and the status line will be disabled. Solution: Check did_emsg instead of called_emsg. (haya14busa, closes https://github.com/vim/vim/issues/729)

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