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a218babc8d
The enum_type_object type inherits from PyLong_Type which is not tracked
by the GC. Instances doesn't have to be tracked by the GC: remove the
Py_TPFLAGS_HAVE_GC flag.
The Python C API documentation says:
"To create a container type, the tp_flags field of the type object
must include the Py_TPFLAGS_HAVE_GC and provide an implementation of
the tp_traverse handler."
https://docs.python.org/dev/c-api/gcsupport.html
The new exception was introduced in Python 3.11 by:
https://github.com/python/cpython/issues/88429
Synopsis
Welcome to Boost.Python, a C++ library which enables seamless interoperability between C++ and the Python programming language. The library includes support for:
- References and Pointers
- Globally Registered Type Coercions
- Automatic Cross-Module Type Conversions
- Efficient Function Overloading
- C++ to Python Exception Translation
- Default Arguments
- Keyword Arguments
- Manipulating Python objects in C++
- Exporting C++ Iterators as Python Iterators
- Documentation Strings
See the Boost.Python documentation for details.
Hint : Check out the development version of the documentation to see work in progress.
Building 
While Boost.Python is part of the Boost C++ Libraries super-project, and thus can be compiled as part of Boost, it can also be compiled and installed stand-alone, i.e. against a pre-installed Boost package.
Prerequisites
Build
Run
faber
to build the library.
Test
Run
faber test.report
to run the tests.
Build docs
Run
faber doc.html
to build the documentation.