Fix invalid free()

[Russiancold]

Я не сварщик, но тут не так должно быть?

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.83%. Comparing base (dbe090c) to head (e830e2c).

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Additional details and impacted files

@@           Coverage Diff           @@
##           master      #65   +/-   ##
=======================================
  Coverage   80.83%   80.83%           
=======================================
  Files           1        1           
  Lines         334      334           
=======================================
  Hits          270      270           
  Misses         45       45           
  Partials       19       19           

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