bpo-40521: Fix _PyContext_Fini() (GH-21103)

Only clear _token_missing in the main interpreter.

diff --git a/Python/context.c b/Python/context.c
index dc340718847507e9287773559f8cd8ca39f591d4..15d8b8ea4b9b61046761e73746581e807c621e0f 100644 (file)
--- a/Python/context.c
+++ b/Python/context.c
@@ -1302,7 +1302,9 @@ _PyContext_ClearFreeList(PyThreadState *tstate)
 void
 _PyContext_Fini(PyThreadState *tstate)
 {
-    Py_CLEAR(_token_missing);
+    if (_Py_IsMainInterpreter(tstate)) {
+        Py_CLEAR(_token_missing);
+    }
     _PyContext_ClearFreeList(tstate);
 #ifdef Py_DEBUG
     struct _Py_context_state *state = &tstate->interp->context;