From: Kumar Aditya <kumaraditya@python.org>
Date: Mon, 15 Sep 2025 14:39:15 +0000 (+0530)
Subject: gh-137992: fix `PyRefTracer_SetTracer` to start world before returning  (#138925)
X-Git-Tag: v3.15.0a1~360
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=5c4bb9b7f6a779351afcdd76f390c572b3c1dc06;p=thirdparty%2FPython%2Fcpython.git

gh-137992: fix `PyRefTracer_SetTracer` to start world before returning  (#138925)

fix deadlock in PyRefTracer_SetTracer
---

diff --git a/Objects/object.c b/Objects/object.c
index c9bcc0c7b09e..1f10c2531fea 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -3292,6 +3292,7 @@ int PyRefTracer_SetTracer(PyRefTracer tracer, void *data) {
     if (_PyRuntime.ref_tracer.tracer_func != NULL) {
         _PyReftracerTrack(NULL, PyRefTracer_TRACKER_REMOVED);
         if (PyErr_Occurred()) {
+            _PyEval_StartTheWorldAll(&_PyRuntime);
             return -1;
         }
     }