Memory leak: Temporary std::set is not deleted.

The following program:

#include <set>
#include <iostream>

std::set<std::string> Foo() {

  std::set<std::string> ret;
  ret.insert("test");
  return ret;
}

int main(int argc, char** argv) {

  while (true) {
    for(auto& s : Foo()) {
      // do nothing.
    }
  }

  return 0;
}

Leaks memory and causes my system to swap after a few seconds. This is on Linux x86_64, ICC Version 17.0.1, GCC Version 6.3.0. I compile like this:

icpc -o test test.C

Compiling the same program with g++ does not show this leak. Any ideas? Is there a bug in the compiler?