pybind / pybind/pybind11

[BUG]: When python3.8 starts a c++ dynamic library containing pybind11, the dynamic library will crash. If you use a C++ process to call this dynamic library, it can run normally

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Description

Required prerequisites
What version (or hash if on master) of pybind11 are you using?

2.11.1

Problem description

When python3.8 starts a c++ dynamic library containing pybind11, the dynamic library will crash. If you use a C++ process to call this dynamic library, it can run normally

Reproducible example code
c++ code       
py::scoped_interpreter python;

        auto scope = py::module_::import("uuid").attr("__dict__");

        pybind11::eval_file("./PythonUnitInterface.py", scope);
Is this a regression? Put the last known working version here if it is.

Not a regression

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the provided py::scoped_interpreter and pybind11::eval_file reproduction, then compare loading the dynamic library from Python 3.8 with calling it from a C++ process. Confirm the crash conditions and environment details, and consider the issue complete only when the failure is reproducible and its cause and fix are covered by appropriate project tests.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp, python
Domain
backend-api-design
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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