bpo-40429: PyThreadState_GetFrame() returns a strong ref (GH-19781)

The PyThreadState_GetFrame() function now returns a strong reference
to the frame.

2 files changed, 6 insertions, 4 deletions

diff --git a/Python/errors.c b/Python/errors.c
index db00770..9e53d05 100644
--- a/Python/errors.c
+++ b/Python/errors.c
@@ -1372,7 +1372,7 @@ _PyErr_WriteUnraisableMsg(const char *err_msg_str, PyObject *obj)
     }
 
     if (exc_tb == NULL) {
-        struct _frame *frame = tstate->frame;
+        PyFrameObject *frame = tstate->frame;
         if (frame != NULL) {
             exc_tb = _PyTraceBack_FromFrame(NULL, frame);
             if (exc_tb == NULL) {
diff --git a/Python/pystate.c b/Python/pystate.c
index d6f5882..dd95750 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -1042,11 +1042,13 @@ PyThreadState_GetInterpreter(PyThreadState *tstate)
 }
 
 
-struct _frame*
+PyFrameObject*
 PyThreadState_GetFrame(PyThreadState *tstate)
 {
     assert(tstate != NULL);
-    return tstate->frame;
+    PyFrameObject *frame = tstate->frame;
+    Py_XINCREF(frame);
+    return frame;
 }
 
 
@@ -1165,7 +1167,7 @@ _PyThread_CurrentFrames(void)
     for (i = runtime->interpreters.head; i != NULL; i = i->next) {
         PyThreadState *t;
         for (t = i->tstate_head; t != NULL; t = t->next) {
-            struct _frame *frame = t->frame;
+            PyFrameObject *frame = t->frame;
             if (frame == NULL) {
                 continue;
             }