Fix use of cleared global variables in concurrent.interpreters.

Author: ZeroIntensity

Lib/concurrent/interpreters/__init__.py

@@ -149,12 +149,14 @@ def __del__(self):
     def __reduce__(self):
         return (type(self), (self._id,))
 
-    def _decref(self):
+    # gh-135729: Globals might be destroyed by the time this is called, so we
+    # need to keep references ourself
+    def _decref(self, InterpreterNotFoundError=InterpreterNotFoundError, _interp_decref=_interpreters.decref):
         if not self._ownsref:
             return
         self._ownsref = False
         try:
-            _interpreters.decref(self._id)
+            _interp_decref(self._id)
         except InterpreterNotFoundError:
             pass