diff --git a/Lib/test/test_warnings.py b/Lib/test/test_warnings.py
--- a/Lib/test/test_warnings.py
+++ b/Lib/test/test_warnings.py
@@ -5,7 +5,7 @@
 import sys
 import unittest
 from test import support
-from test.script_helper import assert_python_ok
+from test.script_helper import assert_python_ok, assert_python_failure
 
 from test import warning_tests
 
@@ -862,6 +862,32 @@
         # of the script
         self.assertEqual(err, b'__main__:7: UserWarning: test')
 
+    def test_issue22898(self):
+        # Should not crash when interp->sysdict is NULL at the end of Python
+        # finalization.
+        code = """if 1:
+            import sys, traceback
+
+            class MyException(Exception):
+                def __init__(self, *args):
+                    1/0
+
+            def gen():
+                f = open('%s')
+                yield
+
+            g = gen()
+            next(g)
+            recursionlimit = sys.getrecursionlimit()
+            sys.setrecursionlimit(len(traceback.extract_stack()))
+            try:
+                g.throw(MyException)
+            finally:
+                sys.setrecursionlimit(recursionlimit)
+        """ % __file__
+        rc, out, err = assert_python_failure("-c", code)
+        # Check that the program does not fail with SIGSEV or SIGABRT.
+        self.assertEqual(rc, 1)
 
 def setUpModule():
     py_warnings.onceregistry.clear()
diff --git a/Python/_warnings.c b/Python/_warnings.c
--- a/Python/_warnings.c
+++ b/Python/_warnings.c
@@ -520,26 +520,37 @@
 
     *module = NULL;
 
-    /* Setup registry. */
-    assert(globals != NULL);
-    assert(PyDict_Check(globals));
-    *registry = PyDict_GetItemString(globals, "__warningregistry__");
-    if (*registry == NULL) {
-        int rc;
+    /* during Python finalization, warnings may be emited after interp->sysdict
+       is cleared: see issue #22898 */
+    if (globals != NULL) {
+        /* Setup registry. */
+        assert(PyDict_Check(globals));
+        *registry = PyDict_GetItemString(globals, "__warningregistry__");
+        if (*registry == NULL) {
+            int rc;
 
-        *registry = PyDict_New();
-        if (*registry == NULL)
-            return 0;
+            *registry = PyDict_New();
+            if (*registry == NULL)
+                return 0;
 
-         rc = PyDict_SetItemString(globals, "__warningregistry__", *registry);
-         if (rc < 0)
-            goto handle_error;
+             rc = PyDict_SetItemString(globals, "__warningregistry__", *registry);
+             if (rc < 0)
+                goto handle_error;
+        }
+        else
+            Py_INCREF(*registry);
+
+        /* Setup module. */
+        *module = PyDict_GetItemString(globals, "__name__");
     }
-    else
-        Py_INCREF(*registry);
+    else {
+        /* Set module to None to ignore the warning and do nothing. */
+        *module = Py_None;
+        Py_INCREF(*module);
+        *registry = NULL;
+        return 0;
+    }
 
-    /* Setup module. */
-    *module = PyDict_GetItemString(globals, "__name__");
     if (*module == NULL) {
         *module = PyUnicode_FromString("<string>");
         if (*module == NULL)
@@ -665,7 +676,7 @@
     res = warn_explicit(category, message, filename, lineno, module, registry,
                         NULL);
     Py_DECREF(filename);
-    Py_DECREF(registry);
+    Py_XDECREF(registry);
     Py_DECREF(module);
     return res;
 }