From: Victor Stinner <victor.stinner@gmail.com>
Date: Mon, 21 Sep 2015 23:01:17 +0000 (+0200)
Subject: _PyUnicodeWriter_PrepareInternal(): make the assertion more strict
X-Git-Tag: v3.6.0a1~1483
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=6174474bea9fe6f5f12f05a16004eabb817ce721;p=python

_PyUnicodeWriter_PrepareInternal(): make the assertion more strict
---

diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 7c079e0799..d0b285abac 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -13307,7 +13307,8 @@ _PyUnicodeWriter_PrepareInternal(_PyUnicodeWriter *writer,
     PyObject *newbuffer;
 
     /* ensure that the _PyUnicodeWriter_Prepare macro was used */
-    assert(maxchar > writer->maxchar || length > 0);
+    assert((maxchar > writer->maxchar && length >= 0)
+           || length > 0);
 
     if (length > PY_SSIZE_T_MAX - writer->pos) {
         PyErr_NoMemory();