commit 8cbc51ab3d9be00ddc296513d6f39b06b2d6b1a1
author Serhiy Storchaka <storchaka@gmail.com> Fri Jan 13 08:38:15 2017 +0200
committer Serhiy Storchaka <storchaka@gmail.com> Fri Jan 13 08:38:15 2017 +0200
tree 3e8b654f3593a4371a987e9893fe255d0e896a27
parent a24dca6a90774ed47fcb37bbe4315a7f8121e4a8
parent a6758427fd96741c6a8a1506f933bb0107d2b0a7

Py_SIZE() was misused for dict.

Modules/_json.c

diff --git a/Modules/_json.c b/Modules/_json.c
index d3fb784..941f363 100644
--- a/Modules/_json.c
+++ b/Modules/_json.c
@@ -1609,7 +1609,7 @@
         if (open_dict == NULL || close_dict == NULL || empty_dict == NULL)
             return -1;
     }
-    if (Py_SIZE(dct) == 0)
+    if (PyDict_GET_SIZE(dct) == 0)  /* Fast path */
         return _PyAccu_Accumulate(acc, empty_dict);
 
     if (s->markers != Py_None) {