robustness: remove unwrap to prevent potential panics

[pi-pi-miao]

• Improves error handling in core modules
• Prevents potential panics in edge cases

[google-cla]

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[PiotrSikora]

Hi @pi-pi-miao, this repository is owned and copyrighted by Google, so a signed CLA is needed before anyone can look at this PR.

Also, I don't believe that any of the other contributors and/or reviewers speak Chinese, so it would be great if you could stick to English. Thanks!

[pi-pi-miao]

Hi @pi-pi-miao, this repository is owned and copyrighted by Google, so a signed CLA is needed before anyone can look at this PR.

Also, I don't believe that any of the other contributors and/or reviewers speak Chinese, so it would be great if you could stick to English. Thanks!

ok,thank you ,I will use English for future commits.