From a8a93042dcfb6673da1a67726e5028c7582099ea Mon Sep 17 00:00:00 2001
From: Benjamin Peterson <benjamin@python.org>
Date: Tue, 30 Sep 2008 02:18:09 +0000
Subject: [PATCH] Merged revisions 66693 via svnmerge from
 svn+ssh://pythondev@svn.python.org/python/trunk

........
  r66693 | benjamin.peterson | 2008-09-29 21:11:07 -0500 (Mon, 29 Sep 2008) | 4 lines

  Victor Stinner's patches to check the return result of PyLong_Ssize_t

  reviewed by Amaury
........
---
 Modules/_bytesio.c | 8 ++++++++
 Modules/_struct.c  | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/Modules/_bytesio.c b/Modules/_bytesio.c
index d7d2667a364..48fe50a0941 100644
--- a/Modules/_bytesio.c
+++ b/Modules/_bytesio.c
@@ -221,6 +221,8 @@ bytesio_read(BytesIOObject *self, PyObject *args)
 
     if (PyLong_Check(arg)) {
         size = PyLong_AsSsize_t(arg);
+        if (size == -1 && PyErr_Occurred())
+            return NULL;
     }
     else if (arg == Py_None) {
         /* Read until EOF is reached, by default. */
@@ -288,6 +290,8 @@ bytesio_readline(BytesIOObject *self, PyObject *args)
 
     if (PyLong_Check(arg)) {
         size = PyLong_AsSsize_t(arg);
+        if (size == -1 && PyErr_Occurred())
+            return NULL;
     }
     else if (arg == Py_None) {
         /* No size limit, by default. */
@@ -332,6 +336,8 @@ bytesio_readlines(BytesIOObject *self, PyObject *args)
 
     if (PyLong_Check(arg)) {
         maxsize = PyLong_AsSsize_t(arg);
+        if (maxsize == -1 && PyErr_Occurred())
+            return NULL;
     }
     else if (arg == Py_None) {
         /* No size limit, by default. */
@@ -415,6 +421,8 @@ bytesio_truncate(BytesIOObject *self, PyObject *args)
 
     if (PyLong_Check(arg)) {
         size = PyLong_AsSsize_t(arg);
+        if (size == -1 && PyErr_Occurred())
+            return NULL;
     }
     else if (arg == Py_None) {
         /* Truncate to current position if no argument is passed. */
diff --git a/Modules/_struct.c b/Modules/_struct.c
index 4a257c00970..ac70f43e640 100644
--- a/Modules/_struct.c
+++ b/Modules/_struct.c
@@ -1786,6 +1786,8 @@ s_pack_into(PyObject *self, PyObject *args)
 
 	/* Extract the offset from the first argument */
 	offset = PyLong_AsSsize_t(PyTuple_GET_ITEM(args, 1));
+	if (offset == -1 && PyErr_Occurred())
+		return NULL;
 
 	/* Support negative offsets. */
 	if (offset < 0)