SIGSEGV when call `mainthread.Terminate()`

[disktnk]

When call mainthread.Terminate(), start finalizing written in mainthread/init.go and C.Py_Finalize() is called after releasing GIL state.

py/mainthread/init.go

Line 38 in d9ae27c

C.Py_Finalize()

simple repro code

C.Py_Initialize()
C.PyEval_InitThreads()
// .. process is done and start finalizing ...
C.PyEval_ReleaseThread(C.PyGILState_GetThisThreadState())
C.Py_Finalize() // -> SIGSEGV