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From 9f63e83b1cec872917647b11155edaffe399d103 Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Sat, 14 Jul 2018 00:46:11 +0900
Subject: [PATCH] Use FLAG_REF always for interned strings
Upstream-Status: Submitted [https://github.com/python/cpython/pull/8226]
Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
---
Python/marshal.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/Python/marshal.c b/Python/marshal.c
index c4538bd..2437160 100644
--- a/Python/marshal.c
+++ b/Python/marshal.c
@@ -298,9 +298,14 @@ w_ref(PyObject *v, char *flag, WFILE *p)
if (p->version < 3 || p->hashtable == NULL)
return 0; /* not writing object references */
- /* if it has only one reference, it definitely isn't shared */
- if (Py_REFCNT(v) == 1)
+ /* If it has only one reference, it definitely isn't shared.
+ * But we use TYPE_REF always for interned string, to PYC file stable
+ * as possible.
+ */
+ if (Py_REFCNT(v) == 1 &&
+ !(PyUnicode_CheckExact(v) && PyUnicode_CHECK_INTERNED(v))) {
return 0;
+ }
entry = _Py_hashtable_get_entry(p->hashtable, v);
if (entry != NULL) {
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