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Fix SeeedStudio recv crash on empty serial read#2072
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Summary of Changes
Fix Seeed Studio CAN interface handling of empty reads.
Related Issues / Pull Requests
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Checklist
tox).Additional Notes
This fixes the crash described in #2024 by guarding against empty reads before trying to parse the returned data. I reproduced the failure path, confirmed that an empty read could be returned, and updated the receive logic so empty data is skipped instead of being treated as a valid frame.