gh-97943: PyFunction_GetAnnotations should return a borrowed reference. (GH-97949)

(cherry picked from commit 6bfb0be80486c614cd60dce44c9fe7b3e6c76e3b)

Co-authored-by: larryhastings <larry@hastings.org>

diff --git a/Misc/NEWS.d/next/Core and Builtins/2022-10-05-17-02-22.gh-issue-97943.LYAWlE.rst b/Misc/NEWS.d/next/Core and Builtins/2022-10-05-17-02-22.gh-issue-97943.LYAWlE.rst
new file mode 100644 (file)
index 0000000..9b4a421
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2022-10-05-17-02-22.gh-issue-97943.LYAWlE.rst
@@ -0,0 +1,2 @@
+Bugfix: :func:`PyFunction_GetAnnotations` should return a borrowed
+reference. It was returning a new reference.

diff --git a/Objects/funcobject.c b/Objects/funcobject.c
index 32b4155c03e6ae01a06822386a8406a7cd613a55..63074634747fa2791198c0c4144866b54b0f59f5 100644 (file)
--- a/Objects/funcobject.c
+++ b/Objects/funcobject.c
@@ -300,7 +300,6 @@ func_get_annotation_dict(PyFunctionObject *op)
         }
         Py_SETREF(op->func_annotations, ann_dict);
     }
-    Py_INCREF(op->func_annotations);
     assert(PyDict_Check(op->func_annotations));
     return op->func_annotations;
 }
@@ -532,7 +531,11 @@ func_get_annotations(PyFunctionObject *op, void *Py_UNUSED(ignored))
         if (op->func_annotations == NULL)
             return NULL;
     }
-    return func_get_annotation_dict(op);
+    PyObject *d = func_get_annotation_dict(op);
+    if (d) {
+        Py_INCREF(d);
+    }
+    return d;
 }
 
 static int