Fix calling order of PyEval_InitThreads. (GH-4602)

mrkn · benjaminp · commit 9e61066355b4 · 2019-09-10T11:29:56.000+01:00
As described in Doc/c-api/init.rst, PyEval_InitThreads() cannot be called
before Py_Initialize() function.
diff --git a/Modules/_ctypes/callbacks.c b/Modules/_ctypes/callbacks.c
@@ -422,8 +422,8 @@ CThunkObject *_ctypes_alloc_callback(PyObject *callable,
 static void LoadPython(void)
 {
     if (!Py_IsInitialized()) {
-        PyEval_InitThreads();
         Py_Initialize();
+        PyEval_InitThreads();
     }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -422,8 +422,8 @@ CThunkObject _ctypes_alloc_callback(PyObject callable,`
`422`	`422`	`static void LoadPython(void)`
`423`	`423`	`{`
`424`	`424`	`if (!Py_IsInitialized()) {`
`425`		`- PyEval_InitThreads();`
`426`	`425`	`Py_Initialize();`
	`426`	`+ PyEval_InitThreads();`
`427`	`427`	`}`
`428`	`428`	`}`
`429`	`429`