patch 9.1.0062: Internal error when :luado/perldo/pydo etc delete lines

Problem:  Internal error when :luado/perldo/pydo etc delete lines
Solution: Test that the line is still valid line number
          (zeertzjq)

closes: #13931

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/if_py_both.h b/src/if_py_both.h
index 42db510..3e5993b 100644
--- a/src/if_py_both.h
+++ b/src/if_py_both.h
@@ -6136,7 +6136,8 @@
 	    goto err;
 
 	// Check that the command didn't switch to another buffer.
-	if (curbuf != was_curbuf)
+	// Check the line number, the command my have deleted lines.
+	if (curbuf != was_curbuf || lnum > curbuf->b_ml.ml_line_count)
 	{
 	    Py_XDECREF(ret);
 	    goto err;