vim-patch:8.2.1004: line numbers below filler lines not always updated

Problem:    Line numbers below filler lines not always updated.
Solution:   Don't break out of the win_line() loop too early. (Christian
            Brabandt, closes vim/vim#6294, closes vim/vim#6138)
https://github.com/vim/vim/commit/511feec6f0a9e954f1d7353425fa51232b1a8e88

1 files changed, 29 insertions, 0 deletions

diff --git a/src/nvim/testdir/test_diffmode.vim b/src/nvim/testdir/test_diffmode.vim
index 49bbe84869..a1f1dd3bab 100644
--- a/src/nvim/testdir/test_diffmode.vim
+++ b/src/nvim/testdir/test_diffmode.vim
@@ -1,6 +1,7 @@
 " Tests for diff mode
 source shared.vim
 source screendump.vim
+source check.vim
 
 func Test_diff_fold_sync()
   enew!
@@ -801,6 +802,34 @@ func Test_diff_closeoff()
   enew!
 endfunc
 
+func Test_diff_rnu()
+  CheckScreendump
+
+  let content =<< trim END
+    call setline(1, ['a', 'a', 'a', 'y', 'b', 'b', 'b', 'b', 'b'])
+    vnew
+    call setline(1, ['a', 'a', 'a', 'x', 'x', 'x', 'b', 'b', 'b', 'b', 'b'])
+    call setline(1, ['a', 'a', 'a', 'y', 'b', 'b', 'b', 'b', 'b'])
+    vnew
+    call setline(1, ['a', 'a', 'a', 'x', 'x', 'x', 'b', 'b', 'b', 'b', 'b'])
+    windo diffthis
+    setlocal number rnu foldcolumn=0
+  END
+  call writefile(content, 'Xtest_diff_rnu')
+  let buf = RunVimInTerminal('-S Xtest_diff_rnu', {})
+
+  call VerifyScreenDump(buf, 'Test_diff_rnu_01', {})
+
+  call term_sendkeys(buf, "j")
+  call VerifyScreenDump(buf, 'Test_diff_rnu_02', {})
+  call term_sendkeys(buf, "j")
+  call VerifyScreenDump(buf, 'Test_diff_rnu_03', {})
+
+  " clean up
+  call StopVimInTerminal(buf)
+  call delete('Xtest_diff_rnu')
+endfunc
+
 func Test_diff_and_scroll()
   " this was causing an ml_get error
   set ls=2