commit 8852ad4208e34825f74e24945edb5bcf055d94fe
author Victor Stinner <vstinner@python.org> Wed Apr 29 01:28:13 2020 +0200
committer GitHub <noreply@github.com> Wed Apr 29 01:28:13 2020 +0200
tree 157f239ba46634301e136f4662b1646f7258357e
parent 5e8c691594d68925213d36296ce7c4b3e90bcb1d

bpo-40429: PyFrame_GetCode() now returns a strong reference (GH-19773)

Objects/frameobject.c

diff --git a/Objects/frameobject.c b/Objects/frameobject.c
index 6b3559e..533186b 100644
--- a/Objects/frameobject.c
+++ b/Objects/frameobject.c
@@ -1237,5 +1237,6 @@
     assert(frame != NULL);
     PyCodeObject *code = frame->f_code;
     assert(code != NULL);
+    Py_INCREF(code);
     return code;
 }

Objects/typeobject.c

diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index f65f053..8f9ab5c 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -8031,7 +8031,6 @@
         /* Call super(), without args -- fill in from __class__
            and first local variable on the stack. */
         PyFrameObject *f;
-        PyCodeObject *co;
         Py_ssize_t i, n;
         f = PyThreadState_GetFrame(_PyThreadState_GET());
         if (f == NULL) {
@@ -8039,7 +8038,8 @@
                             "super(): no current frame");
             return -1;
         }
-        co = PyFrame_GetCode(f);
+        PyCodeObject *co = PyFrame_GetCode(f);
+        Py_DECREF(co);   // use a borrowed reference
         if (co->co_argcount == 0) {
             PyErr_SetString(PyExc_RuntimeError,
                             "super(): no arguments");