patch 8.0.0268: may get ml_get error when :luado deletes lines
Problem: May get ml_get error when :luado deletes lines or switches to
another buffer. (Nikolai Pavlov, issue #1421)
Solution: Check the buffer and line every time.
diff --git a/src/testdir/test_lua.vim b/src/testdir/test_lua.vim
new file mode 100644
index 0000000..944ad90
--- /dev/null
+++ b/src/testdir/test_lua.vim
@@ -0,0 +1,22 @@
+" Tests for Lua.
+" TODO: move tests from test85.in here.
+
+if !has('lua')
+ finish
+endif
+
+func Test_luado()
+ new
+ call setline(1, ['one', 'two', 'three'])
+ luado vim.command("%d_")
+ bwipe!
+
+ " Check switching to another buffer does not trigger ml_get error.
+ new
+ let wincount = winnr('$')
+ call setline(1, ['one', 'two', 'three'])
+ luado vim.command("new")
+ call assert_equal(wincount + 1, winnr('$'))
+ bwipe!
+ bwipe!
+endfunc