bpo-35081: Add Include/internal/pycore_object.h (GH-10640)
Move _PyObject_GC_TRACK() and _PyObject_GC_UNTRACK() from
Include/objimpl.h to Include/internal/pycore_object.h.
diff --git a/Modules/_io/stringio.c b/Modules/_io/stringio.c
index 793fa1e..bb5c373 100644
--- a/Modules/_io/stringio.c
+++ b/Modules/_io/stringio.c
@@ -2,6 +2,7 @@
#include "Python.h"
#include "structmember.h"
#include "pycore_accu.h"
+#include "pycore_object.h"
#include "_iomodule.h"
/* Implementation note: the buffer is always at least one character longer