Change goto label to avoid compile conflict (GH-3241)

Closes GH-3238

Cython/Utility/ExtensionTypes.c

@@ -166,49 +166,49 @@ static int __Pyx_setup_reduce(PyObject* type_obj) {
     PyObject *setstate_cython = NULL;
 
 #if CYTHON_USE_PYTYPE_LOOKUP
-    if (_PyType_Lookup((PyTypeObject*)type_obj, PYIDENT("__getstate__"))) goto GOOD;
+    if (_PyType_Lookup((PyTypeObject*)type_obj, PYIDENT("__getstate__"))) goto __PYX_GOOD;
 #else
-    if (PyObject_HasAttr(type_obj, PYIDENT("__getstate__"))) goto GOOD;
+    if (PyObject_HasAttr(type_obj, PYIDENT("__getstate__"))) goto __PYX_GOOD;
 #endif
 
 #if CYTHON_USE_PYTYPE_LOOKUP
-    object_reduce_ex = _PyType_Lookup(&PyBaseObject_Type, PYIDENT("__reduce_ex__")); if (!object_reduce_ex) goto BAD;
+    object_reduce_ex = _PyType_Lookup(&PyBaseObject_Type, PYIDENT("__reduce_ex__")); if (!object_reduce_ex) goto __PYX_BAD;
 #else
-    object_reduce_ex = __Pyx_PyObject_GetAttrStr((PyObject*)&PyBaseObject_Type, PYIDENT("__reduce_ex__")); if (!object_reduce_ex) goto BAD;
+    object_reduce_ex = __Pyx_PyObject_GetAttrStr((PyObject*)&PyBaseObject_Type, PYIDENT("__reduce_ex__")); if (!object_reduce_ex) goto __PYX_BAD;
 #endif
 
-    reduce_ex = __Pyx_PyObject_GetAttrStr(type_obj, PYIDENT("__reduce_ex__")); if (unlikely(!reduce_ex)) goto BAD;
+    reduce_ex = __Pyx_PyObject_GetAttrStr(type_obj, PYIDENT("__reduce_ex__")); if (unlikely(!reduce_ex)) goto __PYX_BAD;
     if (reduce_ex == object_reduce_ex) {
 
 #if CYTHON_USE_PYTYPE_LOOKUP
-        object_reduce = _PyType_Lookup(&PyBaseObject_Type, PYIDENT("__reduce__")); if (!object_reduce) goto BAD;
+        object_reduce = _PyType_Lookup(&PyBaseObject_Type, PYIDENT("__reduce__")); if (!object_reduce) goto __PYX_BAD;
 #else
-        object_reduce = __Pyx_PyObject_GetAttrStr((PyObject*)&PyBaseObject_Type, PYIDENT("__reduce__")); if (!object_reduce) goto BAD;
+        object_reduce = __Pyx_PyObject_GetAttrStr((PyObject*)&PyBaseObject_Type, PYIDENT("__reduce__")); if (!object_reduce) goto __PYX_BAD;
 #endif
-        reduce = __Pyx_PyObject_GetAttrStr(type_obj, PYIDENT("__reduce__")); if (unlikely(!reduce)) goto BAD;
+        reduce = __Pyx_PyObject_GetAttrStr(type_obj, PYIDENT("__reduce__")); if (unlikely(!reduce)) goto __PYX_BAD;
 
         if (reduce == object_reduce || __Pyx_setup_reduce_is_named(reduce, PYIDENT("__reduce_cython__"))) {
-            reduce_cython = __Pyx_PyObject_GetAttrStr(type_obj, PYIDENT("__reduce_cython__")); if (unlikely(!reduce_cython)) goto BAD;
-            ret = PyDict_SetItem(((PyTypeObject*)type_obj)->tp_dict, PYIDENT("__reduce__"), reduce_cython); if (unlikely(ret < 0)) goto BAD;
-            ret = PyDict_DelItem(((PyTypeObject*)type_obj)->tp_dict, PYIDENT("__reduce_cython__")); if (unlikely(ret < 0)) goto BAD;
+            reduce_cython = __Pyx_PyObject_GetAttrStr(type_obj, PYIDENT("__reduce_cython__")); if (unlikely(!reduce_cython)) goto __PYX_BAD;
+            ret = PyDict_SetItem(((PyTypeObject*)type_obj)->tp_dict, PYIDENT("__reduce__"), reduce_cython); if (unlikely(ret < 0)) goto __PYX_BAD;
+            ret = PyDict_DelItem(((PyTypeObject*)type_obj)->tp_dict, PYIDENT("__reduce_cython__")); if (unlikely(ret < 0)) goto __PYX_BAD;
 
             setstate = __Pyx_PyObject_GetAttrStr(type_obj, PYIDENT("__setstate__"));
             if (!setstate) PyErr_Clear();
             if (!setstate || __Pyx_setup_reduce_is_named(setstate, PYIDENT("__setstate_cython__"))) {
-                setstate_cython = __Pyx_PyObject_GetAttrStr(type_obj, PYIDENT("__setstate_cython__")); if (unlikely(!setstate_cython)) goto BAD;
-                ret = PyDict_SetItem(((PyTypeObject*)type_obj)->tp_dict, PYIDENT("__setstate__"), setstate_cython); if (unlikely(ret < 0)) goto BAD;
-                ret = PyDict_DelItem(((PyTypeObject*)type_obj)->tp_dict, PYIDENT("__setstate_cython__")); if (unlikely(ret < 0)) goto BAD;
+                setstate_cython = __Pyx_PyObject_GetAttrStr(type_obj, PYIDENT("__setstate_cython__")); if (unlikely(!setstate_cython)) goto __PYX_BAD;
+                ret = PyDict_SetItem(((PyTypeObject*)type_obj)->tp_dict, PYIDENT("__setstate__"), setstate_cython); if (unlikely(ret < 0)) goto __PYX_BAD;
+                ret = PyDict_DelItem(((PyTypeObject*)type_obj)->tp_dict, PYIDENT("__setstate_cython__")); if (unlikely(ret < 0)) goto __PYX_BAD;
             }
             PyType_Modified((PyTypeObject*)type_obj);
         }
     }
-    goto GOOD;
+    goto __PYX_GOOD;
 
-BAD:
+__PYX_BAD:
     if (!PyErr_Occurred())
         PyErr_Format(PyExc_RuntimeError, "Unable to initialize pickling for %s", ((PyTypeObject*)type_obj)->tp_name);
     ret = -1;
-GOOD:
+__PYX_GOOD:
 #if !CYTHON_USE_PYTYPE_LOOKUP
     Py_XDECREF(object_reduce);
     Py_XDECREF(object_reduce_ex);