test_doctest are leaked

[Eclips4]

Tried on current main.

 ./python -m test -R 3:3 test_doctest
Running Debug|x64 interpreter...
0:00:00 Run tests sequentially
0:00:00 [1/1] test_doctest
beginning 6 repetitions
123456
<frozen importlib._bootstrap>:824: ImportWarning: TestImporter.exec_module() not found; falling back to load_module()
.<frozen importlib._bootstrap>:824: ImportWarning: TestImporter.exec_module() not found; falling back to load_module()
.<frozen importlib._bootstrap>:824: ImportWarning: TestImporter.exec_module() not found; falling back to load_module()
.<frozen importlib._bootstrap>:824: ImportWarning: TestImporter.exec_module() not found; falling back to load_module()
.<frozen importlib._bootstrap>:824: ImportWarning: TestImporter.exec_module() not found; falling back to load_module()
.<frozen importlib._bootstrap>:824: ImportWarning: TestImporter.exec_module() not found; falling back to load_module()
.
test_doctest leaked [34, 34, 34] memory blocks, sum=102
test_doctest failed (reference leak) in 34.8 sec

== Tests result: FAILURE ==

1 test failed:
    test_doctest

Total duration: 34.9 sec
Tests result: FAILURE

Linked PRs

• gh-106843: fix memleak in _PyCompile_CleanDoc #106846

[Eclips4]

Bisected to #106411
cc @methane

[sunmy2019]

This fixes the problem.

diff --git a/Python/compile.c b/Python/compile.c
index b80f7c01bcd..6a144f30164 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -8060,7 +8060,9 @@ _PyCompile_CleanDoc(PyObject *doc)
     }
 
     Py_DECREF(doc);
-    return PyUnicode_FromStringAndSize(buff, w - buff);
+    PyObject* res = PyUnicode_FromStringAndSize(buff, w - buff);
+    PyMem_Free(buff);
+    return res;
 }
 

[methane]

thanks