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[yanyongyu]

resolve #862

[codecov]

Codecov Report

Merging #863 (871f72c) into master (e2fcfa9) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #863   +/-   ##
=======================================
  Coverage   76.41%   76.41%           
=======================================
  Files          42       42           
  Lines        3083     3083           
=======================================
  Hits         2356     2356           
  Misses        727      727           

Flag	Coverage Δ
unittests	76.41% <ø> (ø)

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[github-actions]

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