Crash when string input is empty or just white space.

[joburkho]

Actual: For the attached valid model using operators from onnxruntime-extensions, the onnxruntime crashes when the input_text parameter is an empty string or just whitespace.

Expected: For the attached valid model using operators from onnxruntime-extensions, the onnxruntime should not crash when the input_text parameter is an empty string or just whitespace.

onnx_prefilter_model.extended.optimized.onnx.zip

[wenbingl]

@joburkho , can you share an input example that causes crash.

Actually, the unit test itself has an empty string case

onnxruntime-extensions/test/test_string_ops.py

Line 913 in fb378b7

input = np.array(["a,,b", "", "aa,b,c", "dddddd"])

[joburkho]

@wenbingl : When you run the model that I attached above using an empty string ( such as "" ) or a string that just contains whitespace ( such as " " ), does it crash? If so, then do you need anything else?