PVS-Studio warning V607 for Eigen

template<typename MatrixType> void miscMatrices(
  const MatrixType& m)
{
  ....
  VectorType v1 = VectorType::Random(rows);
  v1[0];
  ....
}

This suspicious code was found in Eigen project by PVS-Studio static code analyzer.
Warning message is:
V607 Ownerless expression 'v1[0]'. miscmatrices.cpp 28

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