From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Sat, 8 Jun 2024 11:10:44 +0000 (+0200)
Subject: [3.12] gh-120244: Fix re.sub() reference leak (GH-120245) (GH-120265)
X-Git-Tag: v3.12.5~245
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=46e69f8c2568ce7cc6041f8a601478e39d01efb1;p=thirdparty%2FPython%2Fcpython.git

[3.12] gh-120244: Fix re.sub() reference leak (GH-120245) (GH-120265)

(cherry picked from commit 38a25e9560cf0ff0b80d9e90bce793ff24c6e027)

Co-authored-by: neonene <53406459+neonene@users.noreply.github.com>
---

diff --git a/Misc/NEWS.d/next/Library/2024-06-08-09-45-31.gh-issue-120244.8o9Dzr.rst b/Misc/NEWS.d/next/Library/2024-06-08-09-45-31.gh-issue-120244.8o9Dzr.rst
new file mode 100644
index 000000000000..d21532f22a1d
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2024-06-08-09-45-31.gh-issue-120244.8o9Dzr.rst
@@ -0,0 +1 @@
+Fix memory leak in :func:`re.sub()` when the replacement string contains backreferences.
diff --git a/Modules/_sre/sre.c b/Modules/_sre/sre.c
index 0547390454a3..8ef35d0658c7 100644
--- a/Modules/_sre/sre.c
+++ b/Modules/_sre/sre.c
@@ -1572,6 +1572,7 @@ _sre_template_impl(PyObject *module, PyObject *pattern, PyObject *template)
         }
         self->items[i].literal = Py_XNewRef(literal);
     }
+    PyObject_GC_Track(self);
     return (PyObject*) self;
 
 bad_template: