Avoid DECREF calls on None.

nascheme · nascheme · commit 1c02b7e7f82d · 2025-02-19T09:48:51.000-08:00
diff --git a/Python/_warnings.c b/Python/_warnings.c
@@ -285,7 +285,6 @@ get_warnings_context_filters(PyInterpreterState *interp)
         return NULL;
     }
     if (ctx == Py_None) {
-        Py_DECREF(ctx);
         Py_RETURN_NONE;
     }
     PyObject *context_filters = PyObject_GetAttr(ctx, &_Py_ID(_filters));
@@ -509,7 +508,6 @@ get_filter(PyInterpreterState *interp, PyObject *category,
     }
     if (context_filters == Py_None) {
         use_global_filters = true;
-        Py_DECREF(context_filters);
     } else {
         PyObject *context_action = NULL;
         if (!filter_search(interp, category, text, lineno, module, "_warnings_context _filters",

Original file line number	Diff line number	Diff line change
`@@ -285,7 +285,6 @@ get_warnings_context_filters(PyInterpreterState *interp)`
`285`	`285`	`return NULL;`
`286`	`286`	`}`
`287`	`287`	`if (ctx == Py_None) {`
`288`		`- Py_DECREF(ctx);`
`289`	`288`	`Py_RETURN_NONE;`
`290`	`289`	`}`
`291`	`290`	`PyObject *context_filters = PyObject_GetAttr(ctx, &_Py_ID(_filters));`
`@@ -509,7 +508,6 @@ get_filter(PyInterpreterState interp, PyObject category,`
`509`	`508`	`}`
`510`	`509`	`if (context_filters == Py_None) {`
`511`	`510`	`use_global_filters = true;`
`512`		`- Py_DECREF(context_filters);`
`513`	`511`	`} else {`
`514`	`512`	`PyObject *context_action = NULL;`
`515`	`513`	`if (!filter_search(interp, category, text, lineno, module, "_warnings_context _filters",`