enum_<> and memory leak due to binding

[Wawha]

Hello,

when declaring a py::enum<> adding values, all py objects create inside py::enum_<>::value() seems never destroyed.
I know that Python runtime have lot of leak, but it seems that py::class_<> doesn't generates leak, while enum_<> does.

Perhaps it's due to the usage of .attr() function inside enum_<>.

When embedding the interpreter inside a C++ program, is it something "normal" to have all values declare during py::enum_<>::value(...) never destroyed, or is it a pybind11 bug?