PVS-Studio warning V501 for Chromium

Vector3dF
Matrix3F::SolveEigenproblem(Matrix3F* eigenvectors) const
{
  // The matrix must be symmetric.
  const float epsilon = std::numeric_limits<float>::epsilon();
  if (std::abs(data_[M01] - data_[M10]) > epsilon ||
      std::abs(data_[M02] - data_[M02]) > epsilon ||
      std::abs(data_[M12] - data_[M21]) > epsilon) {
    NOTREACHED();
    return Vector3dF();
  }
  ....
}

This suspicious code was found in Chromium project by PVS-Studio static code analyzer.
Warning message is:
V501 There are identical sub-expressions to the left and to the right of the '-' operator: data_[M02] - data_[M02] matrix3_f.cc 128

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/