patch 8.0.0270: may get ml_get error when :rubydo deletes lines
Problem: May get ml_get error when :rubydo 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_ruby.vim b/src/testdir/test_ruby.vim
index 106ccb4..174467f 100644
--- a/src/testdir/test_ruby.vim
+++ b/src/testdir/test_ruby.vim
@@ -32,3 +32,20 @@
redir END
call assert_equal(['{"a"=>"foo", "b"=>123}'], split(l:out, "\n"))
endfunc
+
+func Test_rubydo()
+ " Check deleting lines does not trigger ml_get error.
+ new
+ call setline(1, ['one', 'two', 'three'])
+ rubydo Vim.command("%d_")
+ bwipe!
+
+ " Check switching to another buffer does not trigger ml_get error.
+ new
+ let wincount = winnr('$')
+ call setline(1, ['one', 'two', 'three'])
+ rubydo Vim.command("new")
+ call assert_equal(wincount + 1, winnr('$'))
+ bwipe!
+ bwipe!
+endfunc