Fix size calculation in _PyDict_DebugMallocStats

MazinSharaf · web-flow · commit 8dfae59679c9 · 2026-04-07T11:06:12.000+10:00
diff --git a/Objects/dictobject.c b/Objects/dictobject.c
@@ -443,7 +443,7 @@ _PyDict_DebugMallocStats(FILE *out)
 {
     _PyDebugAllocatorStats(out, "free PyDictObject",
                            _Py_FREELIST_SIZE(dicts),
-                           sizeof(PyDictObject));
+                           _PyType_PreHeaderSize(&PyDict_Type) + sizeof(PyDictObject));
     _PyDebugAllocatorStats(out, "free PyDictKeysObject",
                            _Py_FREELIST_SIZE(dictkeys),
                            sizeof(PyDictKeysObject));

Original file line number	Diff line number	Diff line change
`@@ -443,7 +443,7 @@ _PyDict_DebugMallocStats(FILE *out)`
`443`	`443`	`{`
`444`	`444`	`_PyDebugAllocatorStats(out, "free PyDictObject",`
`445`	`445`	`_Py_FREELIST_SIZE(dicts),`
`446`		`- sizeof(PyDictObject));`
	`446`	`+ _PyType_PreHeaderSize(&PyDict_Type) + sizeof(PyDictObject));`
`447`	`447`	`_PyDebugAllocatorStats(out, "free PyDictKeysObject",`
`448`	`448`	`_Py_FREELIST_SIZE(dictkeys),`
`449`	`449`	`sizeof(PyDictKeysObject));`