gh-106916: Add missing error check _PyCompile_CleanDoc (#106921)

Eclips4 · serhiy-storchaka · web-flow · commit 85ed1d24427b · 2023-07-21T13:56:58.000+09:00
Co-authored-by: Serhiy Storchaka &lt;storchaka@gmail.com&gt;
diff --git a/Python/compile.c b/Python/compile.c
@@ -8053,6 +8053,12 @@ _PyCompile_CleanDoc(PyObject *doc)
     }
 
     char *buff = PyMem_Malloc(doc_size);
+    if (buff == NULL){
+        Py_DECREF(doc);
+        PyErr_NoMemory();
+        return NULL;
+    }
+
     char *w = buff;
 
     while (p < pend) {
