std::stringstream unexpected behavior when use pybind11 module in jupyter cell which the module was staticlly linked with stdc++（linux only）

[buchengsyh]

the demo code below:

#include "pybind11/pybind11.h"
#include <iostream>
#include <sstream>


std::string str() {
  std::string str = "str>" + std::to_string(3.14);
  return str;
}

std::string ss() {
  std::stringstream ss;
  ss << "ss>" << 3.15;
  return ss.str();
}

PYBIND11_MODULE(example, m) {
  m.def("str", &str);
  m.def("ss", &ss);
}

The necessary step to reproduce the problem is to add the -static-libstdc++ link flag when compiling example shared library.

copy the python test code to run inside of jupyter cell:

import example

print(example.ss())
print(example.str())

You will see a strange result that the output of the ss() function is missing the number 3.14

But if executed directly from the terminal, it works fine and is not lost

Can anyone give me some advice and/or tips？