Handle slice start past the end case. (#3157)

src/ngraph/frontend/onnx_import/op/slice.cpp

@@ -18,6 +18,7 @@
 #include <memory>
 #include <vector>
 
+#include "ngraph/log.hpp"
 #include "ngraph/node.hpp"
 #include "ngraph/op/slice.hpp"
 #include "slice.hpp"
@@ -59,6 +60,15 @@ namespace ngraph
                             get_valid_array_idx(ends.at(idx), data_shape.at(axis));
                     }
 
+                    // Check for cases when start is greater than end and change them to "empty" slice.
+                    for (auto idx = 0; idx < lower_bounds.size(); ++idx)
+                    {
+                        if (lower_bounds.at(idx) > upper_bounds.at(idx))
+                        {
+                            upper_bounds.at(idx) = lower_bounds.at(idx);
+                        }
+                    }
+
                     return {std::make_shared<ngraph::op::Slice>(data, lower_bounds, upper_bounds)};
                 }