c – clang-check的垃圾值是多少

test.cpp:14:25: warning: The right operand of '/' is a garbage value
    return (std::abs(a) / sizE) > 10;
                        ^ ~~~~

对于这段代码：

#include <algorithm>
#include <complex>
#include <vector>
#include <iostream>

using namespace std;
double
pitchDetect(const std::vector<std::complex<double>> &dft,unsigned int samplingRatE) noexcept {
  if (dft.empty())
    return 0.0;
  auto it = find_if(begin(dft),end(dft),[size = dft.size()](const std::complex<double> &a) {
    return (std::abs(a) / sizE) > 10;
  });
  return 0.0;
}

我不明白是什么问题！