commit 0e4a5e96f011989736bde824ab817146bd7c9cfc
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Fri May 08 04:28:38 2020 -0700
committer GitHub <noreply@github.com> Fri May 08 04:28:38 2020 -0700
tree 888ace0c55e2da9010ec7791da9149b040647e40
parent bce4ddafdd188cc6deb1584728b67b9e149ca6a4

[3.8] bpo-40559: Add Py_DECREF to _asynciomodule.c:task_step_impl() (GH-19990)

This fixes a possible memory leak in the C implementation of
asyncio.Task.
(cherry picked from commit d2c349b190bcba21a4a38e6520a48ad97a9f1529)

Co-authored-by: Chris Jerdonek <chris.jerdonek@gmail.com>

Modules/_asynciomodule.c

diff --git a/Modules/_asynciomodule.c b/Modules/_asynciomodule.c
index 5ba2bc4..8e1cd4f 100644
--- a/Modules/_asynciomodule.c
+++ b/Modules/_asynciomodule.c
@@ -2626,6 +2626,10 @@
     coro = task->task_coro;
     if (coro == NULL) {
         PyErr_SetString(PyExc_RuntimeError, "uninitialized Task object");
+        if (clear_exc) {
+            /* We created 'exc' during this call */
+            Py_DECREF(exc);
+        }
         return NULL;
     }