fix inifite loop caused by divide by zero

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (a654bea) 46.12% compared to head (6fc4afc) 46.12%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #105 +/- ## ======================================= Coverage 46.12% 46.12% ======================================= Files 44 44 Lines 2517 2517 ======================================= Hits 1161 1161 Misses 1356 1356 ```

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