_PySys_Init(): It's rarely a good idea to size a buffer to the

exact maximum size someone guesses is needed.  In this case, if
we're really worried about extreme integers, then "cp%d" can
actually need 14 bytes (2 for "cp" + 1 for \0 at the end +
11 for -(2**31-1)).  So reserve 128 bytes instead -- nothing is
actually saved by making a stack-local buffer tiny.

Python/sysmodule.c

@@ -1031,7 +1031,7 @@ _PySys_Init(void)
 	PyObject *sysin, *sysout, *syserr;
 	char *s;
 #ifdef MS_WINDOWS
-	char buf[13];
+	char buf[128];
 #endif
 
 	m = Py_InitModule3("sys", sys_methods, sys_doc);