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

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(cherry picked from commit 38a25e9560)

Co-authored-by: neonene <53406459+neonene@users.noreply.github.com>
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Miss Islington (bot) 2024-06-08 13:10:44 +02:00 • committed by GitHub
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Misc/NEWS.d/next/Library/2024-06-08-09-45-31.gh-issue-120244.8o9Dzr.rst Normal file
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@ -0,0 +1 @@
Fix memory leak in :func:`re.sub()` when the replacement string contains backreferences.

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Modules/_sre/sre.c
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@ -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: